U.S. patent application number 11/942220 was filed with the patent office on 2008-09-11 for phytase variants.
This patent application is currently assigned to Novozymes A/S. Invention is credited to Dirk Kostrewa, Soren Flensted Lassen, Martin Lehmann, Luis Pasamontes, Allan Svendsen, Andrea Tomschy, Adolphus Van Loon, Kurt Vogel, Markus Wyss.
Application Number | 20080219965 11/942220 |
Document ID | / |
Family ID | 27576013 |
Filed Date | 2008-09-11 |
United States Patent
Application |
20080219965 |
Kind Code |
A1 |
Svendsen; Allan ; et
al. |
September 11, 2008 |
Phytase Variants
Abstract
The present invention relates to phytase variants, their
preparation and uses, which phytase variants, when aligned
according to FIG. 1, are amended as compared to a model phytase in
at least one of a number of positions. Preferred model phytases are
basidiomycete and ascomycete phytases, such as Peniophora phytase
and Aspergillus phytases. Preferred phytase variants exhibits
amended activity characteristics, such as improved specific
activity and/or improved thermostability.
Inventors: |
Svendsen; Allan; (Birkerod,
DK) ; Lassen; Soren Flensted; (Kobenhavn O, DK)
; Kostrewa; Dirk; (Freiburg, DE) ; Pasamontes;
Luis; (Montclair, NJ) ; Lehmann; Martin;
(Princeton, NJ) ; Tomschy; Andrea;
(Grenzach-Wyhlen, DE) ; Van Loon; Adolphus;
(Rheinfelden, CH) ; Vogel; Kurt; (Basel, CH)
; Wyss; Markus; (Liestal, CH) |
Correspondence
Address: |
NOVOZYMES NORTH AMERICA, INC.
500 FIFTH AVENUE, SUITE 1600
NEW YORK
NY
10110
US
|
Assignee: |
Novozymes A/S
Bagsvaerd
DK
|
Family ID: |
27576013 |
Appl. No.: |
11/942220 |
Filed: |
November 19, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10734510 |
Dec 12, 2003 |
7326554 |
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11942220 |
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10083452 |
Feb 26, 2002 |
6689358 |
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10734510 |
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09273871 |
Mar 22, 1999 |
6514495 |
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10083452 |
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60080129 |
Mar 31, 1998 |
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60090675 |
Jun 25, 1998 |
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60101642 |
Sep 24, 1998 |
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60117677 |
Jan 28, 1999 |
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Current U.S.
Class: |
424/94.6 ;
435/195 |
Current CPC
Class: |
C12N 9/16 20130101; A23K
10/14 20160501; Y10S 435/911 20130101; Y10S 435/916 20130101; A23K
20/189 20160501; C12N 15/8257 20130101; C12N 15/8243 20130101; C12N
15/8242 20130101 |
Class at
Publication: |
424/94.6 ;
435/195 |
International
Class: |
A61K 38/46 20060101
A61K038/46; C12N 9/14 20060101 C12N009/14 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 23, 1998 |
DK |
PA 1998 00407 |
Jun 19, 1998 |
DK |
PA 1998 00806 |
Sep 18, 1998 |
DK |
PA 1998 01176 |
Jan 22, 1999 |
DK |
PA 1999 00091 |
Claims
1-85. (canceled)
86. A modified phytase comprising a mutation in an amino acid
sequence of a phytase, wherein the modified phytase has phytase
activity and the mutation is at one or more positions selected from
the group consisting of 24; 27; 31; 33; 39; 40; 41; 42; 46; 49; 56;
59; 68; 69; 70; 71; 72; 73; 74; 75; 76; 77; 78; 81; 82; 84; 116;
117; 119; 120; 121; 122; 123; 124; 125; 127; 128; 132; 149; 150;
151; 152; 155; 156; 157; 158; 159; 160; 161; 162; 163; 170f; 170g;
171; 184; 185; 187; 190; 191; 192; 193; 194; 200; 201; 201a; 201b;
201c; 201d; 201f; 202; 223; 228; 232; 233; 235; 236; 237; 239; 243;
246; 253; 256; 271; 272; 274; 275; 276; 277; 279; 280; 283; 285;
287; 288; 292, 293; 304; 332; 333; 334; 335; 336; 338; 341; 342;
343; 348; 349; 362; 364; 367; 368; 369; 370; 371; 372; 374; 375;
376; 387; 393; 394; 396; 409; 412; 413; 421; and 431, wherein each
position corresponds to the position of the amino acid sequence of
the mature P. lycii phytase (SEQ ID NO: 7).
87. The modified phytase of claim 86, wherein the mutation is
selected from the group consisting of: 24C; 27P; 31Y; 33C; 39H,S,Q;
40L,N; 42S,G; 49P; 56P; 58D,K,A; 59G; 69Q; 75W,F; 78D,S; 81A,G,Q,E;
82T; 84I,Y,Q,V; 116S; 119E; 120L; 122A; 123N,Q,T; 125M,S; 127Q,E,N;
128A,S,T; 132F,I,L; 151A,S; 152G; 157V; 158D,A; 159T; 160A,S;
161T,N; 162N; 163W; 170fH; 170gA; 171N; 184Q,S,P; 185S; 187A;
190A,P; 193S; 194S,T; 200G,V; 201D,E; 201a( ); 201b( ); 201c( );
201d( ); 201f( ); 202S,A; 223H,D; 228N; 232T; 233E; 235Y,L,T;
236Y,N; 237F; 246V; 253P; 256D; 271D,N; 275F,Y; 280A,P; 283P;
287A,T; 288L,I,F; 292F,Y; 293A,V; 304P,A; 332F; 336S; 338I;
343A,S,F,I,L; 348Y; 349P; 362P; 364W,F; 367A,K; 368K; 369I,L; 370V;
374S,A; 375H; 376M; 387P; 393V; 396R; 409R; 412R; 421F,Y; and
431E.
88. The modified phytase of claim 86, wherein the phytase is an
ascomycete phytase.
89. The modified phytase of claim 88, wherein the phytase is an
Aspergillus phytase.
90. The modified phytase of claim 89, wherein the phytase is an
Aspergillus ficuum, Aspergillus fumigatus, Aspergillus nidulans,
Aspergillus niger, or Aspergillus terreus phytase.
91. The modified phytase of claim 90, wherein the phytase is an
Aspergillus terreus, CBS 116.46 phytase.
92. The modified phytase of claim 86, wherein the phytase is a
Myceliophthora thermophila, Talaromyces thermophilus, or
Thermomyces lanuginosus phytase.
93. The modified phytase of claim 92, wherein the phytase is a
Myceliophthora thermophila, ATCC 34625 or ATCC 74340 phytase.
94. The modified phytase of claim 88, wherein the phytase is a
Talaromyces thermophilus, ATCC 20186 or ATCC 74338 phytase.
95. The modified phytase of claim 88, wherein the phytase is a
Thermomyces lanuginosus, NRRL B21527 phytase.
96. The modified phytase of claim 86, wherein the phytase is an
ascomycete consensus phytase sequence.
97. The modified phytase of claim 86, wherein the phytase is a
basidiomycete phytase.
98. The modified phytase of claim 97, wherein the phytase is an
Agrocybe pediades, Paxillus involutus, Peniophora lycii, or
Trametes pubescens phytase.
99. The modified phytase of claim 98, wherein the phytase is a
Paxillus involutus, CBS 100231 phytase.
100. The modified phytase of claim 99, wherein the phytase is a
Paxillus involutus, CBS 100231 Phy-A2 phytase.
101. The modified phytase of claim 98, wherein the phytase is a
Trametes pubescens, CBS 100232 phytase.
102. A feed or food comprising a modified phytase of claim 86.
103. A composition comprising a modified phytase of claim 86.
104. A process for reducing phytate levels in animal manure
comprising feeding an animal with an effective amount of the feed
of claim 102.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 10/734,510 filed Dec. 12, 2003, which is a divisional of U.S.
application Ser. No. 10/083,452 filed Feb. 26, 2002, now U.S. Pat.
No. 6,689,358, which is a continuation of U.S. application Ser. No.
09/273,871 filed Mar. 22, 1999, now U.S. Pat. No. 6,514,495, which
claims priority or the benefit of Danish application nos. PA 1998
00407, PA 1998 00806, PA 1998 01176, and PA 1999 00091 filed Mar.
23, 1998, Jun. 19, 1998, Sep. 18, 1998 and Jan. 22, 1999,
respectively, and U.S. provisional application Nos. 60/080,129,
60/090,675, 60/101,642 and 60/117,677 filed Mar. 31, 1998, Jun. 25,
1998, Sep. 24, 1998 and Jan. 28, 1999, respectively, the contents
of which are fully incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] This invention relates to variants of phytases, in
particular variants of ascomycete phytases and variants of
basidiomycete phytases, the corresponding cloned DNA sequences, a
method of producing such phytase variants, and the use thereof for
a number of industrial applications.
[0004] 2. Description of Related Art
[0005] Phytic acid or myo-inositol 1,2,3,4,5,6-hexakis dihydrogen
phosphate (or for short myo-inositol hexakisphosphate) is the
primary source of inositol and the primary storage form of
phosphate in plant seeds. Phytin is a mixed potassium, magnesium
and calcium salt of inositol.
[0006] The phosphate moieties of phytic acid chelates divalent and
trivalent cations such as metal ions, i.a. the nutritionally
essential ions of calcium, iron, zinc and magnesium as well as the
trace minerals manganese, copper and molybdenum.
[0007] Phytic acid and its salts, phytates, are often not
metabolized, i.e., neither the phosphorous thereof, nor the
chelated metal ions are nutritionally available.
[0008] Accordingly, food and feed preparations need to be
supplemented with inorganic phosphate and often also the
nutritionally essential ions such as iron and calcium, must be
supplemented.
[0009] Still further, the phytate phosphorus passes through the
gastrointestinal tract of such animals and is excreted with the
manure, resulting in an undesirable phosphate pollution of the
environment resulting e.g., in eutrophication of the water
environment and extensive growth of algae.
[0010] Phytic acid or phytates, said terms being, unless otherwise
indicated, in the present context used synonymously or at random,
are degradable by phytases.
[0011] The production of phytases by plants as well as by
microorganisms has been reported. Amongst the microorganisms,
phytase producing bacteria as well as phytase producing fungi are
known.
[0012] There are several descriptions of phytase producing
filamentous fungi belonging to the fungal phylum of Ascomycota
(ascomycetes). In particular, there are several references to
phytase producing ascomycetes of the Aspergillus genus such as
Aspergillus terreus (Yamada et al., 1986, Agric. Biol. Chem.
322:1275-1282). Also, the cloning and expression of the phytase
gene from Aspergillus niger var. awamori has been described
(Piddington et al., 1993, Gene 133:55-62). EP 0420358 describes the
cloning and expression of a phytase of Aspergillus ficuum (niger).
EP 0684313 describes the cloning and expression of phytases of the
ascomycetes Aspergillus niger, Myceliophthora thermophila,
Aspergillus terreus. Still further, some partial sequences of
phytases of Aspergillus nidulans, Talaromyces thermophilus,
Aspergillus fumigatus and another strain of Aspergillus terreus are
given.
[0013] The cloning and expression of a phytase of Thermomyces
lanuginosus is described in WO 97/35017.
[0014] There is a current need for phytases of amended properties
or characteristics, e.g., phytases of increased thermostability,
altered pH optimum (a high pH optimum being desirable for in-vitro
processing, a low for in-vivo processing in the gastro-intestinal
tract), and/or of a higher specific activity.
SUMMARY OF THE INVENTION
[0015] In a first aspect, the invention provides phytase variants,
the characteristics of which are amended--as compared to a
so-called model phytase.
[0016] Any model phytase, which is of a certain similarity to
thirteen herein specifically disclosed model phytases, can be made
the model of such variants.
[0017] In another aspect, the invention relates to a novel phytase
derived from Cladorrhinum foecundissimum.
[0018] In still another aspect, the invention provides DNA
sequences encoding these phytase variants and this phytase, and
methods of their production.
[0019] Finally, the invention also relates generally to the use of
the phytase and the phytase variants for liberating phosphorous
from any phytase substrate, in particular inorganic phosphate from
phytate or phytic acid.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In the detailed description of the invention below,
reference is made to the drawings, of which
[0021] FIGS. 1A, 1B, 1C, and 1D show an alignment of thirteen
specific phytase sequences (a multiple sequence alignment according
to the program PileUp; GapWeight: 3.000; GapLengthWeight: 0.100)
(SEQ ID NOS: 3-15);
[0022] FIG. 2 shows the amino acid and DNA sequence of a phytase
("C.sub.--foecundissimum") derived from strain CBS 427.97 of
Cladorrhinum foecundissimum (SEQ ID NOS: 1 and 2) which was
deposited on 23 Jan. 1997; the expression plasmid pYES 2.0
comprising the full length cDNA sequence was transformed into E.
coli strain DSM 12742 which was deposited on 17 Mar. 1999;
[0023] FIG. 3 shows an alignment of the phytase
C.sub.--foecundissimum (SEQ ID NO: 2) with the model phytase
M.sub.--thermophila (SEQ ID NO: 15), using the program GAP gcg (Gap
Weight 3.000; Length Weight 0.100); and
[0024] FIGS. 4A, 4B, 4C and 4D show how the C.sub.--foecundissimum
phytase can be pasted onto the alignment of FIG. 1 (SEQ ID NOS:
2-15).
DETAILED DISCLOSURE OF THE INVENTION
[0025] Phytase
[0026] In the present context a phytase is an enzyme which
catalyzes the hydrolysis of phytate (myo-inositol hexakisphosphate)
to (1) myo-inositol and/or (2) mono-, di-, tri-, tetra- and/or
penta-phosphates thereof and (3) inorganic phosphate. In the
following, for short, the above compounds are sometimes referred to
as IP6, I, IP1, IP2, IP3, IP4, IP5 and P, respectively. This means
that by action of a phytase, IP6 is degraded into P+one or more of
the components IP5, IP4, IP3, IP2, IP1 and I. Alternatively,
myo-inositol carrying in total n phosphate groups attached to
positions p, q, r, . . . is denoted Ins(p,q,r, . . . )Pn. For
convenience Ins(1,2,3,4,5,6)P6 (phytic acid) is abbreviated PA.
[0027] According to the Enzyme nomenclature database ExPASy (a
repository of information relative to the nomenclature of enzymes
primarily based on the recommendations of the Nomenclature
Committee of the International Union of Biochemistry and Molecular
Biology (IUBMB) describing each type of characterized enzyme for
which an EC (Enzyme Commission) number has been provided), two
different types of phytases are known: A so-called 3-phytase
(myo-inositol hexaphosphate 3-phosphohydrolase, EC 3.1.3.8) and a
so-called 6-phytase (myo-inositol hexaphosphate 6-phosphohydrolase,
EC 3.1.3.26). The 3-phytase hydrolyzes first the ester bond at the
D-3-position, whereas the 6-phytase hydrolyzes first the ester bond
at the D-6- or L-6-position.
[0028] The expression "phytase" or "polypeptide or enzyme
exhibiting phytase activity" is intended to cover any enzyme
capable of effecting the liberation of inorganic phosphate or
phosphorous from various myo-inositol phosphates. Examples of such
myo-inositol phosphates (phytase substrates) are phytic acid and
any salt thereof, e.g., sodium phytate or potassium phytate or
mixed salts. Also any stereoisomer of the mono-, di-, tri-, tetra-
or penta-phosphates of myo-inositol might serve as a phytase
substrate. A preferred phytase substrate is phytic acid and salts
thereof.
[0029] In accordance with the above definition, the phytase
activity can be determined using any assay in which one of these
substrates is used. In the present context (unless otherwise
specified) the phytase activity is determined in the unit of FYT,
one FYT being the amount of enzyme that liberates 1 micro-mol
inorganic ortho-phosphate per min. under the following conditions:
pH 5.5; temperature 37.degree. C.; substrate: sodium phytate
(C.sub.6H.sub.6O.sub.24P.sub.6Na.sub.12) in a concentration of
0.0050 mol/l. A suitable phytase assay is described in the
experimental part.
[0030] The present invention provides a genetically engineered
phytase as described in the appending claims.
[0031] A genetically engineered phytase is a non-naturally
occurring phytase which is different from a model phytase, e.g., a
wild-type phytase. Genetically engineered phytases include, but are
not limited to, phytases prepared by site-directed mutagenesis,
gene shuffling, random mutagenesis etc.
[0032] The invention also provides DNA constructs, vectors, host
cells, and methods of producing these genetically engineered
phytases and phytase variants, as well as uses thereof.
[0033] A phytase variant is a polypeptide or enzyme or a fragment
thereof which exhibits phytase activity and which is amended as
compared to a model phytase.
[0034] Amended means altered by way of one or more amino acid or
peptide substitutions, deletions, insertions and/or additions--in
each case by, or of, one or more amino acids. Such substitutions,
deletions, insertions, additions can be achieved by any method
known in the art, e.g., gene shuffling, random mutagenesis,
site-directed mutagenesis etc.
[0035] The model or parent phytase, from which the phytase variant
is derived, can be any phytase, e.g., a wild-type phytase or a
derivative, mutant or variant thereof, including allelic and
species variants, as well as genetically engineered variants
thereof, which e.g., can be prepared by site-directed mutagenesis,
random mutagenesis, shuffling etc.
[0036] Included in the concept of model phytase is also any hybrid
or chimeric phytase, i.e., a phytase which comprises a combination
of partial amino acid sequences derived from at least two
phytases.
[0037] The hybrid phytase may comprise a combination of partial
amino acid sequences deriving from at least two ascomycete
phytases, at least two basidiomycete phytases or from at least one
ascomycete and at least one basidiomycete phytase. These ascomycete
and basidiomycete phytases from which a partial amino acid sequence
derives may, e.g., be any of those specific phytases referred to
herein.
[0038] In the present context, a hybrid, shuffled, random
mutagenized, site-directed mutagenized or otherwise genetically
engineered phytase derived from ascomycete phytases only is also an
ascomycete phytase; and a hybrid, shuffled, random mutagenized,
site-directed mutagenized or otherwise genetically engineered
phytase derived from model basidiomycete phytases only is also a
basidiomycete phytase. Any hybrid derived from at least one
ascomycete phytase as well as at least one basidiomycete phytase is
called a mixed ascomycete/basidiomycete phytase and such phytase is
also a model phytase in the present context.
[0039] Analogously, a hybrid, shuffled, random mutagenized,
site-directed mutagenized or otherwise genetically engineered
phytase derived from one or more Aspergillus phytases is also an
Aspergillus derived phytase; and a hybrid, shuffled, random
mutagenized, site-directed mutagenized or otherwise genetically
engineered phytase derived from any other taxonomic sub-grouping
mentioned herein is also to be designated a phytase derived from
this taxonomic sub-grouping.
[0040] Still further, in the present context, "derived from" is
intended to indicate a phytase produced or producible by a strain
of the organism in question, but also a phytase encoded by a DNA
sequence isolated from such strain and produced in a host organism
transformed with said DNA sequence. Finally, the term is intended
to indicate a phytase which is encoded by a DNA sequence of
synthetic and/or cDNA origin and which has the identifying
characteristics of the phytase in question.
[0041] Preferably the model phytase is a phytase which can be
aligned as described below to either of the thirteen phytases of
FIG. 1 (which are particularly preferred model phytases).
[0042] Preferred wild-type model phytases (i.e., neither
recombinant, or shuffled or otherwise genetically engineered
phytases) have a degree of similarity or homology, preferably
identity, to amino acid residues 38-403 (Peniophora numbers) of
either of these thirteen phytases or at least 40%, more preferably
at least 50%, still more preferably at least 60%, in particular at
least 70%, especially at least 80%, and in a most preferred
embodiment a degree of similarity of at least 90%.
[0043] Preferred recombinant or shuffled or otherwise genetically
engineered model phytases have a degree of similarity or homology,
preferably identity, to amino acid residues 38-49, 63-77, 274-291,
281-300 and 389-403 (Peniophora numbers) of either of these
thirteen phytases or at least 60%, more preferably at least 70%,
still more preferably at least 80%, in particular at least 90%.
[0044] In a preferred embodiment the degree of similarity is based
on a comparison with the complete amino acid sequence of either of
the thirteen phytases.
[0045] The degree of similarity or homology, alternatively
identity, can be determined using any alignment programme known in
the art. A preferred alignment programme is GAP provided in the GCG
version 8 program package (Program Manual for the Wisconsin
Package, Version 8, August 1994, Genetics Computer Group, 575
Science Drive, Madison, Wis., USA 53711) (see also Needleman, S. B.
and Wunsch, C. D., (1970), Journal of Molecular Biology, 48,
443-453). Using GAP with the following settings for polypeptide
sequence comparison: GAP weight of 3.000 and GAP length weight of
0.100.
[0046] Also preferred is a wild-type model phytase which comprises
an amino acid sequence encoded by a DNA sequence which hybridizes
to a DNA sequence encoding amino acid sequence 38-403 (Peniophora
numbers) of any of the DNA sequences encoding the thirteen specific
phytase sequences of FIG. 1.
[0047] A further preferred model phytase is a genetically
engineered phytase, which comprises an amino acid sequence encoded
by a DNA sequence which hybridizes to a DNA sequence encoding amino
acid sequence 38-49, and to a DNA sequence encoding amino acid
sequence 63-77, and to a DNA sequence encoding amino acid sequence
274-291, and to a DNA sequence encoding amino acid sequence
281-300, and to a DNA sequence encoding amino acid sequence 389-403
(Peniophora numbers) of any of the DNA sequences encoding the
thirteen specific phytase sequences of FIG. 1.
[0048] In a preferred embodiment the hybridization is to the
complete phytase encoding part of any of the thirteen phytases.
[0049] Suitable experimental conditions for determining whether a
given DNA or RNA sequence "hybridizes" to a specified nucleotide or
oligonucleotide probe involves presoaking of the filter containing
the DNA fragments or RNA to examine for hybridization in
5.times.SSC (Sodium chloride/Sodium citrate), (J. Sambrook, E. F.
Fritsch, and T. Maniatis, 1989, Molecular Cloning, A Laboratory
Manual, 2d edition, Cold Spring Harbor, N.Y.) for 10 min, and
prehybridization of the filter in a solution of 5.times.SSC,
5.times.Denhardt's solution (Sambrook et al., 1989), 0.5% SDS and
100 micrograms/ml of denatured sonicated salmon sperm DNA (Sambrook
et al., 1989), followed by hybridization in the same solution
containing a concentration of 10 ng/ml of a random-primed
(Feinberg, A. P. and Vogelstein, B., 1983, Anal. Biochem.
132:6-13), .sup.32P-dCTP-labeled (specific activity>1.times.109
cpm/microgram) probe for 12 hours at approximately 45.degree.
C.
[0050] The filter is then washed twice for 30 minutes in
2.times.SSC, 0.5% SDS at least 55.degree. C. (low stringency), at
least 60.degree. C. (medium stringency), at least 65.degree. C.
(medium/high stringency), at least 70.degree. C. (high stringency),
or at least 75.degree. C. (very high stringency).
[0051] Molecules to which the oligonucleotide probe hybridizes
under these conditions are detected using an x-ray film.
[0052] It should be noted that a certain specific phytase variant
need not actually have been prepared from a specific model phytase,
for this model phytase to qualify as a "model phytase" in the
present context. It is sufficient that the variant exhibits at
least one of the herein indicated amendments when it is afterwards
compared with the model phytase.
[0053] The alignment of FIG. 1 is made using the program PileUp
(Program Manual for the Wisconsin Package, Version 8, August 1994,
Genetics Computer Group, 575 Science Drive, Madison, Wis., USA
53711), with a GapWeight of 3.000 and a GapLengthWeight of 0.100.
When aligning a new model phytase or a new phytase variant all
thirteen sequences can be included together with the new phytase
(variant) in a multiple alignment, or, alternatively, at least one
of the thirteen sequences of FIG. 1 is included together with the
new phytase (variant) in an alignment.
[0054] A preferred procedure for aligning according to FIG. 1 a new
model phytase (or a phytase variant) is as follows: The new model
phytase is aligned with that specific sequence of the thirteen
sequences of FIG. 1 to which the new model phytase has the highest
degree of homology. For calculating the degree of homology, and for
making the "alignment according to FIG. 1" of the two sequences,
the program GAP referred to below is preferably used. Having
aligned the two sequences, the new model phytase (or phytase
variant) is added (pasted) to the alignment at FIG. 1 using the
result of the first alignment (placing identical and homologous
amino acid residues above each other as prescribed by the
alignment), following which corresponding positions are now easily
identifiable.
[0055] Example 7 shows an example of how to add a new model phytase
to the alignment of FIG. 1 and deduce corresponding phytase
variants thereof.
[0056] Other model phytases can be aligned and variants deduced in
analogy with Example 7. This is so in particular for the following
model phytases: The phytase of Aspergillus niger var. awamori (U.S.
Pat. No. 5,830,733); the Bacillus phytase of WO 98/06858; the soy
bean phytase of WO 98/20139; the maize phytase of WO 98/05785; the
Aspergillus phytase of WO 97/38096; the phytases of Monascus anka
of WO 98/13480; the phytase from Schwanniomyces occidentalis of EP
0699762 etc.
[0057] When comparing a model phytase and a proposed phytase
variant using the alignment as described herein, corresponding
amino acid positions can be identified, viz. a model position of
the model phytase and a variant position of the variant--the
corresponding model position and variant position are simply placed
one above the other in the alignment. An amendment is said to have
occurred in a given position if the model amino acid of the model
position and the variant amino acid of the variant position are
different. Preferred amendments of these positions manifest
themselves as amino acid substitutions, deletions or additions.
[0058] Amended in at least one position means amended in one or
more positions, i.e., in one, two, three, four, five, six, seven,
eight, nine, ten, eleven, twelve etc. up to all N positions listed.
This definition includes any possible sub-combinations thereof,
e.g., any set of two substitutions, any set of three, any set of
four, etc.--to any set of (N-1) positions.
[0059] In the present context all sequences, whatever the model
phytase, and including the thirteen sequences of FIG. 1, are
numbered using the numbering corresponding to the phytase
P.sub.--lycii. These "Peniophora numbers" are indicated at FIG. 1,
together with the "alignment numbers." The numbering of
P.sub.--lycii starts at M1 and ends at E439.
[0060] As explained above, the alignment reveals which positions in
various phytase sequences other than P.sub.--lycii are equivalent
or corresponding to the given P. lycii position.
[0061] A substitution of amino acids is indicated herein as for
instance "3S," which indicates, that at position 3 amino acid S
should be substituted for the "original" or model position 3 amino
acid, whichever it is. Thus, the substitution should result in an S
in the corresponding variant position. Considering now the
alignment at FIG. 1, a substitution like e.g., "3S" is to be
interpreted as follows, for the respective phytases shown (the
amino acid first indicated is the "original" or model amino acid in
"Peniophora position" 3):
[0062] P.sub.--involtus_A1: F3S (number 3 F substituted by S)
[0063] P.sub.--involtus_A2: L3S
[0064] T.sub.--pubescens: M1S
[0065] A.sub.--pediades: M1S
[0066] P.sub.--lycii: redundant (already an S)
[0067] A.sub.--fumigatus: T5S
[0068] consphyA: V5S
[0069] A.sub.--nidulans: T5S
[0070] A.sub.--ficuum_NRRL3135: A5S
[0071] A.sub.--terreus: A5S
[0072] T.sub.--thermo: L5S
[0073] T.sub.--lanuginosa: V11S
[0074] M.sub.--thermophila: G5S
[0075] However, in what follows the above specific substitutions
will be designated as follows (always using the Peniophora
numbering):
[0076] P.sub.--involtus_A1: F3S
[0077] P.sub.--involtus_A2: L3S
[0078] T.sub.--pubescens: M3S
[0079] A.sub.--pediades: M3S
[0080] P.sub.--lycii: redundant (already an S)
[0081] A.sub.--fumigatus: T3S
[0082] consphyA: V3S
[0083] A.sub.--nidulans: T3S
[0084] A.sub.--ficuum_NRRL3135: A3S
[0085] A.sub.--terreus: A3S
[0086] T.sub.--thermo: L3S
[0087] T.sub.--lanuginosa: V3S
[0088] M.sub.--thermophila: G3S
[0089] Still further, denotations like e.g., "3S,F,G" means that
the amino acid in position 3 (Peniophora numbers) of the model
phytase in question is substituted with either of S, F or G, i.e.,
e.g., the designation "3S,F,G" is considered fully equivalent to
the designation "3S, 3F, 3G".
[0090] A denotation like ( )3S means that amino acid S is added to
the sequence in question (at a gap in the actual sequence), in a
position corresponding to Peniophora number 3--and vice versa for
deletions (S3( )).
[0091] In case of regions in which the Peniophora phytase sequence
has larger deletions than some of the other phytases in FIG. 1, for
instance in the region between position 201 and 202 (Peniophora
numbers), intermediate positions (amino acid residues in other
sequences) are numbered by adding a,b,c,d, etc, in lower-case
letters, to the last Peniophora position number, e.g., for the
phytase M.sub.--thermophila: E201; G201a; P201b; Y201c; S201d;
T201e; I201f; G202; D203 etc.
[0092] In one of the priority applications of the present
application there are two minor position numbering errors:
According to the above definitions, the positions referred to in
the first priority application as 204 and 205 (Peniophora numbers)
are wrongly designated; they should have been numbered 203a and
204, respectively. Therefore, 204 has been substituted by 203a and
205 by 204 throughout the present application.
[0093] A preferred phytase variant of the invention comprises an
amino acid sequence which comprises, preferably contains, one or
more of the following amino acid substitutions: 24C; 27P; 31Y; 33C;
39H,S,Q; 40L,N; 42S,G; 43A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
44N; 45D,S; 47Y,F; 49P; 51E,A,R; 56P; 58D,K,A; 59G; 61R; 62V,I;
69Q; 75W,F; 78D,S; 79G; 80K,A; 81A,G,Q,E; 82T; 83A,I,K,R,Q;
84I,Y,Q,V; 88I; 90R,A; 102Y; 115N; 116S; 118V,L; 119E; 120L; 122A;
123N,Q,T; 125M,S; 126H,S,V; 127Q,E,N; 128A,S,T; 132F,I,L; 143N;
148V,I; 151A,S; 152G; 153D,Y; 154D,Q,S,G; 157V; 158D,A; 159T;
160A,S; 161T,N; 162N; 163W; 170fH; 170gA; 171N; 172P; 173Q,S;
184Q,S,P; 185S; 186A,E,P; 187A; 187aS; 190A,P; 193S; 194S,T;
195T,V,L; 198A,N,V; 200G,V; 201D,E; a deletion of at least one of
201a, 201b, 201c, 201d, 201e, 201f, preferably all; 201eT; 202S,A;
203R,K,S; 203aV,T; 204Q,E,S,A,V; 205E; 211L,V; 215A,P; 220L,N;
223H,D; 228N; 232T; 233E; 235Y,L,T; 236Y,N; 237F; 238L,M; 242P,S;
244D; 246V; 251eE,Q; 253P; 256D; 260A,H; 264R,I; 265A,Q; 267D;
270Y,A,L,G; 271D,N; 273D,K; 275F,Y; 278T,H; 280A,P; 283P; 287A,T;
288L,I,F; 292F,Y; 293A,V; 302R,H; 304P,A; 332F; 336S; 337T,G,Q,S;
338I; 339V,I; 340P,A; 343A,S,F,I,L; 348Y; 349P; 352K; 360R; 362P;
364W,F; 365V,L,A,S; 366D,S,V; 367A,K; 368K; 369I,L; 370V; 373A,S;
374S,A; 375H; 376M; 383kQ,E; 387P; 393V; 396R; 404A,G; 409R;
411K,T; 412R; 417E,R; 421F,Y; 431E.
[0094] In a preferred embodiment this is with the proviso that the
model phytase does not already comprise the above suggested amino
acid substitution or addition or deletion at the position
indicated. Or, with the proviso that, for each position, the model
amino acid is not already the variant amino acid hereby proposed.
But these provisos can be said to be in fact already inherent in
the above wording, because of the expression "amended."
[0095] The various preferred phytase variants of claims 16-34
comprises, preferably contains or have, amino acid sequences which
comprise or contain one or more of the amino acid substitutions,
additions, or deletions listed in the respective claims.
[0096] In a preferred embodiment the various phytase variants
comprise 1, 2, 3, 4, 5, 6, 7, 8, 9 or even 10 of these
substitutions; or a number of substitutions of 10-15, 15-20, 20-30
or even 30-50; eventually up to 60, 70, 80 or 90 substitutions.
[0097] In another preferred embodiment, the amino acid sequence of
the various phytase variants comprise one or more substitutions of
the substitution sub-groupings listed hereinbelow; or combinations
of substitutions classified in two or more sub-groupings.
[0098] Generally, instead of "comprise," "contain" or "have," the
amino acid sequences of preferred variants "consist essentially of"
or "consist of" the specific model phytases of FIG. 1, as modified
by one or more of the substitutions described herein.
[0099] In the present context a basidiomycete means a microorganism
of the phylum Basidiomycota. This phylum of Basidiomycota is
comprised in the fungal kingdom together with e.g., the phylum
Ascomycota ("ascomycetes").
[0100] Taxonomical questions can be clarified by consulting the
references listed below or by consulting a fungal taxonomy database
(NIH Data Base (Entrez)) which is available via the Internet on
World Wide Web.
[0101] For a definition of basidiomycetes, reference is made to
either Julich, 1981, Higher Taxa of Basidiomycetes; Ainsworth &
Bisby's (eds.) Dictionary of the Fungi, 1995, Hawksworth, D. L., P.
M. Kirk, B. C. Sutton & D. N. Pegler; or Hansen & Knudsen
(Eds.), Nordic Macromycetes, vol. 2 (1992) and 3 (1997). A
preferred reference is Hansen & Knudsen.
[0102] For a definition of ascomycetes, reference is made to either
of Ainsworth & Brisby cited above or Systema Ascomycetum by
Eriksson, O. E. & D. L. Hawksworth, Vol. 16, 1998. A preferred
reference is Eriksson et al.
[0103] Generally, a microorganism which is classified as a
basidiomycete/ascomycete in either of the references listed above,
including the database, is a basidiomycete/ascomycete in the
present context.
[0104] Some Aspergillus strains are difficult to classify because
they are anamorphous, and therefore they might be classified in
Fungi Imperfecti. However, once the teleomorphous counterpart is
found, it is re-classified taxonomically. For instance, the
teleomorph of A. nidulans is Emericella nidulans (of the family
Trichocomaceae, the order Eurotiales, the class Plectomycetes of
the phylum Ascomycota). These subgroupings of Ascomycota are
preferred, together with the family Lasiosphaeriaceae, the order
Sordariales, the class Pyrenomycetes of the phylum Ascomycota.
[0105] The wording "ascomycetes" and analogues as used herein
includes any strains of Aspergillus, Thermomyces, Myceliophthora,
and Talaromyces, which are anamorphous and thus would be classified
in Fungi Imperfecti.
[0106] Preferred basidiomycete phytases are those listed in WO
98/28409, in the very beginning of the section headed "Detailed
description of the invention".
[0107] DNA sequences encoding the thirteen specifically listed
model phytases and other model phytases can be prepared according
to the teachings of each of the documents listed under the brief
description of the drawings.
[0108] A DNA sequence encoding a model phytase may be isolated from
any cell or microorganism producing the phytase in question, using
various methods well known in the art. First, a genomic DNA and/or
cDNA library should be constructed using chromosomal DNA or
messenger RNA from the organism that produces the phytase. Then, if
the amino acid sequence of the phytase is known, homologous,
labelled oligonucleotide probes may be synthesized and used to
identify phytase-encoding clones from a genomic library prepared
from the organism in question. Alternatively, a labelled
oligonucleotide probe containing sequences homologous to a known
phytase gene could be used as a probe to identify phytase-encoding
clones, using hybridization and washing conditions of lower
stringency.
[0109] Yet another method for identifying phytase-encoding clones
would involve inserting fragments of genomic DNA into an expression
vector, such as a plasmid, transforming phytase-negative bacteria
with the resulting genomic DNA library, and then plating the
transformed bacteria onto agar containing a substrate for phytase
thereby allowing clones expressing the phytase to be
identified.
[0110] Alternatively, the DNA sequence encoding the enzyme may be
prepared synthetically by established standard methods, e.g., the
phosphoroamidite method described by S. L. Beaucage and M. H.
Caruthers (1981) or the method described by Matthes et al. (1984).
In the phosphoroamidite method, oligonucleotides are synthesized,
e.g., in an automatic DNA synthesizer, purified, annealed, ligated
and cloned in appropriate vectors.
[0111] Finally, the DNA sequence may be of mixed genomic and
synthetic origin, mixed synthetic and cDNA origin or mixed genomic
and cDNA origin, prepared by ligating fragments of synthetic,
genomic or cDNA origin (as appropriate, the fragments corresponding
to various parts of the entire DNA sequence), in accordance with
standard techniques. The DNA sequence may also be prepared by
polymerase chain reaction (PCR) using specific primers, for
instance as described in U.S. Pat. No. 4,683,202 or R. K. Saiki et
al. (1988).
[0112] DNA encoding the phytase variants of the present invention
can be prepared by methods known in the art, such as site-directed
mutagenesis. Once a DNA sequence encoding a model phytase of
interest has been isolated, and desirable sites for mutation
identified, mutations may be introduced using synthetic
oligonucleotides. These oligonucleotides contain nucleotide
sequences flanking the desired mutation sites; mutant nucleotides
are inserted during oligonucleotide synthesis. In a specific
method, a single-stranded gap of DNA, bridging the phytase-encoding
sequence, is created in a vector carrying the phytase-encoding
gene. Then the synthetic nucleotide, bearing the desired mutation,
is annealed to a homologous portion of the single-stranded DNA. The
remaining gap is then filled in with DNA polymerase I (Klenow
fragment) and the construct is ligated using T4 ligase. A specific
example of this method is described in Morinaga et al. (1984). U.S.
Pat. No. 4,760,025 discloses the introduction of oligonucleotides
encoding multiple mutations by performing minor alterations of the
cassette. However, an even greater variety of mutations can be
introduced at any one time by the Morinaga method because a
multitude of oligonucleotides, of various lengths, can be
introduced.
[0113] Another method of introducing mutations into DNA sequences
encoding a desired model phytase is described in Nelson and Long
(1989). It involves a 3-step generation of a PCR fragment
containing the desired mutation introduced by using a chemically
synthesized DNA strand as one of the primers in the PCR reactions.
From the PCR-generated fragment, a DNA fragment carrying the
mutation may be isolated by cleavage with restriction endonucleases
and reinserted into an expression plasmid.
[0114] Yet another method of mutating DNA sequences encoding a
model phytase is random mutagenesis. Random mutagenesis is suitably
performed either as localized or region-specific random mutagenesis
in at least three parts of the gene translating to the amino acid
sequence shown in question, or within the whole gene.
[0115] The random mutagenesis of a DNA sequence encoding a model
phytase may be conveniently performed by use of any method known in
the art.
[0116] In relation to the above, further aspects of the present
invention relates to a method for generating a variant of a model
phytase, wherein the variant preferably exhibits amended
characteristics as described below, the method comprising:
[0117] (a) subjecting a DNA sequence encoding the model phytase to
Site-directed Mutagenesis, or the Nelson and Long PCR mutagenesis
method or to random mutagenesis,
[0118] (b) expressing the mutated DNA sequence obtained in step (a)
in a host cell, and
[0119] (c) screening for host cells expressing a phytase variant
which has an altered property relative to the model phytase.
[0120] When using random mutagenesis, step (a) of the above method
of the invention is preferably performed using doped primers.
[0121] For instance, the random mutagenesis may be performed by use
of a suitable physical or chemical mutagenizing agent, by use of a
suitable oligonucleotide, or by subjecting the DNA sequence to PCR
generated mutagenesis. Furthermore, the random mutagenesis may be
performed by use of any combination of these mutagenizing agents.
The mutagenizing agent may, e.g., be one which induces transitions,
transversions, inversions, scrambling, deletions, and/or
insertions.
[0122] Examples of a physical or chemical mutagenizing agent
suitable for the present purpose include ultraviolet (UV)
irradiation, hydroxylamine, N-methyl-N'-nitro-N-nitrosoguanidine
(MNNG), O-methyl hydroxylamine, nitrous acid, ethyl methane
sulphonate (EMS), sodium bisulphite, formic acid, and nucleotide
analogues. When such agents are used, the mutagenesis is typically
performed by incubating the DNA sequence encoding the parent enzyme
to be mutagenized in the presence of the mutagenizing agent of
choice under suitable conditions for the mutagenesis to take place,
and selecting for mutated DNA having the desired properties.
[0123] When the mutagenesis is performed by the use of an
oligonucleotide, the oligonucleotide may be doped or spiked with
the three non-parent nucleotides during the synthesis of the
oligonucleotide at the positions which are to be changed. The
doping or spiking may be done so that codons for unwanted amino
acids are avoided. The doped or spiked oligonucleotide can be
incorporated into the DNA encoding the phytase enzyme by any
published technique, using e.g., PCR, LCR or any DNA polymerase and
ligase as deemed appropriate.
[0124] Preferably, the doping is carried out using "constant random
doping", in which the percentage of wild-type and mutation in each
position is predefined. Furthermore, the doping may be directed
toward a preference for the introduction of certain nucleotides,
and thereby a preference for the introduction of one or more
specific amino acid residues. The doping may be made, e.g., so as
to allow for the introduction of 90% wild type and 10% mutations in
each position. An additional consideration in the choice of a
doping scheme is based on genetic as well as protein-structural
constraints. The doping scheme may be made by using the DOPE
program which, inter alia, ensures that introduction of stop codons
is avoided.
[0125] When PCR-generated mutagenesis is used, either a chemically
treated or non-treated gene encoding a model phytase is subjected
to PCR under conditions that increase the mis-incorporation of
nucleotides (Deshler, 1992; Leung et al., 1989, Technique, Vol. 1,
pp. 11-15).
[0126] A mutator strain of E. coli (Fowler et al., Molec. Gen.
Genet., 133, 1974, pp. 179-191), S. cereviseae or any other
microbial organism may be used for the random mutagenesis of the
DNA encoding the model phytase by, e.g., transforming a plasmid
containing the parent glycosylase into the mutator strain, growing
the mutator strain with the plasmid and isolating the mutated
plasmid from the mutator strain. The mutated plasmid may be
subsequently transformed into the expression organism.
[0127] The DNA sequence to be mutagenized may be conveniently
present in a genomic or cDNA library prepared from an organism
expressing the model phytase. Alternatively, the DNA sequence may
be present on a suitable vector such as a plasmid or a
bacteriophage, which as such may be incubated with or otherwise
exposed to the mutagenizing agent. The DNA to be mutagenized may
also be present in a host cell either by being integrated in the
genome of said cell or by being present on a vector harboured in
the cell. Finally, the DNA to be mutagenized may be in isolated
form. It will be understood that the DNA sequence to be subjected
to random mutagenesis is preferably a cDNA or a genomic DNA
sequence.
[0128] In some cases it may be convenient to amplify the mutated
DNA sequence prior to performing the expression step b) or the
screening step c). Such amplification may be performed in
accordance with methods known in the art, the presently preferred
method being PCR-generated amplification using oligonucleotide
primers prepared on the basis of the DNA or amino acid sequence of
the parent enzyme.
[0129] Subsequent to the incubation with or exposure to the
mutagenizing agent, the mutated DNA is expressed by culturing a
suitable host cell carrying the DNA sequence under conditions
allowing expression to take place. The host cell used for this
purpose may be one which has been transformed with the mutated DNA
sequence, optionally present on a vector, or one which was carried
the DNA sequence encoding the parent enzyme during the mutagenesis
treatment. Examples of suitable host cells are the following: gram
positive bacteria such as Bacillus subtilis, Bacillus
licheniformis, Bacillus lentus, Bacillus brevis, Bacillus
stearotherinophilus, Bacillus alkalophilus, Bacillus
amyloliquefaciens, Bacillus coagulans, Bacillus circulans, Bacillus
lautus, Bacillus megaterium, Bacillus thuringiensis, Streptomyces
lividans or Streptomyces murinus; and gram-negative bacteria such
as E. coli.
[0130] The mutated DNA sequence may further comprise a DNA sequence
encoding functions permitting expression of the mutated DNA
sequence.
[0131] The random mutagenesis may be advantageously localized to a
part of the model phytase in question using Localized random
mutagenesis. This may, e.g., be advantageous when certain regions
of the enzyme have been identified to be of particular importance
for a given property of the enzyme, and when modified are expected
to result in a variant having improved properties. Such regions may
normally be identified when the tertiary structure of the parent
enzyme has been elucidated and related to the function of the
enzyme.
[0132] The localized or region-specific random mutagenesis is
conveniently performed by use of PCR generated mutagenesis
techniques as described above or any other suitable technique known
in the art. Alternatively, the DNA sequence encoding the part of
the DNA sequence to be modified may be isolated, e.g., by insertion
into a suitable vector, and said part may be subsequently subjected
to mutagenesis by use of any of the mutagenesis methods discussed
above.
[0133] For region-specific random mutagenesis with a view to
amending e.g., the specific activity of a model phytase, codon
positions corresponding to the following amino acid residues from
the amino acid sequences set forth in FIG. 1 may appropriately be
targeted:
[0134] Residues: 41-47, 68-80, 83-84, 115-118, 120-126, 128,
149-163, 184-185, 191-193, 198-201e, 202-203, 205, 235-236,
238-239, 242-243, 270-279, 285, 288, 332-343, 364-367, 369-375,
394.
[0135] Regions: 41-47, 68-80, 120-128, 149-163, 270-279, 332-343,
364-375.
[0136] The random mutagenesis may be carried out by the following
steps:
[0137] 1. Select regions of interest for modification in the parent
enzyme
[0138] 2. Decide on mutation sites and non-mutated sites in the
selected region
[0139] 3. Decide on which kind of mutations should be carried out,
e.g., with respect to the desired stability and/or performance of
the variant to be constructed
[0140] 4. Select structurally reasonable mutations
[0141] 5. Adjust the residues selected by step 3 with regard to
step 4.
[0142] 6. Analyse by use of a suitable dope algorithm the
nucleotide distribution.
[0143] 7. If necessary, adjust the wanted residues to genetic code
realism, e.g., taking into account constraints resulting from the
genetic code, e.g., in order to avoid introduction of stop codons;
the skilled person will be aware that some codon combinations
cannot be used in practice and will need to be adapted
[0144] 8. Make primers
[0145] 9. Perform random mutagenesis by use of the primers
[0146] 10. Select resulting phytase variants by screening for the
desired improved properties.
[0147] Suitable dope algorithms for use in step 6 are well known in
the art. One such algorithm is described by Tomandl, D. et al.,
1997, Journal of Computer-Aided Molecular Design 11:29-38. Another
algorithm is DOPE (Jensen, L J, Andersen, K V, Svendsen, A, and
Kretzschmar, T., 1998, Nucleic Acids Research 26:697-702).
[0148] A DNA sequence encoding a model phytase or a phytase variant
of the invention can be expressed using an expression vector, a
recombinant expression vector, which typically includes control
sequences encoding a promoter, operator, ribosome binding site,
translation initiation signal, and, optionally, a repressor gene or
various activator genes.
[0149] The recombinant expression vector may be any vector which
may conveniently be subjected to recombinant DNA procedures, and
the choice of vector will often depend on the host cell into which
it is to be introduced. Thus, the vector may be an autonomously
replicating vector, e.g., a plasmid, a bacteriophage or an
extra-chromosomal element. Alternatively, the vector may be one
which, when introduced into a host cell, is integrated into the
host cell genome and replicated together with the chromosome(s)
into which it has been integrated.
[0150] In the vector, the DNA sequence should be operably connected
to a suitable promoter sequence. The promoter may be any DNA
sequence which shows transcriptional activity in the host cell of
choice and may be derived from genes encoding proteins either
homologous or heterologous to the host cell. An example of a
suitable promoter for directing the transcription of the DNA
sequence encoding a phytase variant of the invention, especially in
a bacterial host, is the promoter of the lac operon of E. coli. For
transcription in a fungal host, examples of useful promoters are
those derived from the gene encoding A. oryzae TAKA amylase.
[0151] The expression vector of the invention may also comprise a
suitable transcription terminator and, in eukaryotes,
polyadenylation sequences operably connected to the DNA sequence
encoding the phytase variant of the invention. Termination and
polyadenylation sequences may suitably be derived from the same
sources as the promoter.
[0152] The vector may further comprise a DNA sequence enabling the
vector to replicate in the host cell in question. Examples of such
sequences are the origins of replication of plasmids pUC19,
pACYC177, pUB110, pE194, pAMB1 and pIJ702.
[0153] The vector may also comprise a selectable marker, e.g., a
gene the product of which complements a defect in the host cell,
such as the dal genes from B. subtilis or B. licheniformis, or one
which confers antibiotic resistance such as ampicillin resistance.
Furthermore, the vector may comprise Aspergillus selection markers
such as amdS, argB, niaD and sC, or the selection may be
accomplished by co-transformation, e.g., as described in WO
91/17243.
[0154] The procedures used to ligate the DNA construct of the
invention encoding a phytase variant, the promoter, terminator and
other elements, respectively, and to insert them into suitable
vectors containing the information necessary for replication, are
well known to persons skilled in the art (cf., for instance,
Sambrook et al. (1989)).
[0155] The cell of the invention, either comprising a DNA construct
or an expression vector of the invention as defined above, is
advantageously used as a host cell in the recombinant production of
a phytase variant of the invention. The cell may be transformed
with the DNA construct of the invention encoding the variant,
conveniently by integrating the DNA construct (in one or more
copies) in the host chromosome. This integration is generally
considered to be an advantage as the DNA sequence is more likely to
be stably maintained in the cell. Integration of the DNA constructs
into the host chromosome may be performed according to conventional
methods, e.g., by homologous or heterologous recombination.
Alternatively, the cell may be transformed with an expression
vector as described above in connection with the different types of
host cells.
[0156] An isolated DNA molecule or, alternatively, a "cloned DNA
sequence" "a DNA construct," "a DNA segment" or "an isolated DNA
sequence" refers to a DNA molecule or sequence which can be cloned
in accordance with standard cloning procedures used in genetic
engineering to relocate the DNA segment from its natural location
to a different site where it will be replicated. The term refers
generally to a nucleic acid sequence which is essentially free of
other nucleic acid sequences, e.g., at least about 20% pure,
preferably at least about 40% pure, more preferably about 60% pure,
even more preferably about 80% pure, most preferably about 90%
pure, and even most preferably about 95% pure, as determined by
agarose gel electrophoresis. The cloning procedures may involve
excision and isolation of a desired nucleic acid fragment
comprising the nucleic acid sequence encoding the polypeptide,
insertion of the fragment into a vector molecule, and incorporation
of the recombinant vector into a host cell where multiple copies or
clones of the nucleic acid sequence will be replicated. The nucleic
acid sequence may be of genomic, cDNA, RNA, semisynthetic,
synthetic origin, or any combinations thereof.
[0157] The term "vector" is intended to include such terms/objects
as "nucleic acid constructs," "DNA constructs," expression vectors"
or "recombinant vectors."
[0158] The nucleic acid construct comprises a nucleic acid sequence
of the present invention operably linked to one or more control
sequences capable of directing the expression of the coding
sequence in a suitable host cell under conditions compatible with
the control sequences.
[0159] "Nucleic acid construct" is defined herein as a nucleic acid
molecule, either single or double-stranded, which is isolated from
a naturally occurring gene or which has been modified to contain
segments of nucleic acid which are combined and juxtaposed in a
manner which would not otherwise exist in nature.
[0160] The term nucleic acid construct may be synonymous with the
term expression cassette when the nucleic acid construct contains
all the control sequences required for expression of a coding
sequence of the present invention.
[0161] The term "coding sequence" as defined herein primarily
comprises a sequence which is transcribed into mRNA and translated
into a polypeptide of the present invention when placed under the
control of the above mentioned control sequences. The boundaries of
the coding sequence are generally determined by a translation start
codon ATG at the 5'-terminus and a translation stop codon at the
3'-terminus. A coding sequence can include, but is not limited to,
DNA, cDNA, and recombinant nucleic acid sequences.
[0162] The term "control sequences" is defined herein to include
all components which are necessary or advantageous for expression
of the coding sequence of the nucleic acid sequence. Each control
sequence may be native or foreign to the nucleic acid sequence
encoding the polypeptide. Such control sequences include, but are
not limited to, a leader, a polyadenylation sequence, a propeptide
sequence, a promoter, a signal sequence, and a transcription
terminator. At a minimum, the control sequences include a promoter,
and transcriptional and translational stop signals. The control
sequences may be provided with linkers for the purpose of
introducing specific restriction sites facilitating ligation of the
control sequences with the coding region of the nucleic acid
sequence encoding a polypeptide.
[0163] A "host cell" or "recombinant host cell" encompasses any
progeny of a parent cell which is not identical to the parent cell
due to mutations that occur during replication.
[0164] The cell is preferably transformed with a vector comprising
a nucleic acid sequence of the invention followed by integration of
the vector into the host chromosome.
[0165] "Transformation" means introducing a vector comprising a
nucleic acid sequence of the present invention into a host cell so
that the vector is maintained as a chromosomal integrant or as a
self-replicating extra-chromosomal vector. Integration is generally
considered to be an advantage as the nucleic acid sequence is more
likely to be stably maintained in the cell. Integration of the
vector into the host chromosome may occur by homologous or
non-homologous recombination as described above.
[0166] The host cell may be a unicellular microorganism, e.g., a
prokaryote, or a non-unicellular microorganism, e.g., a eukaryote.
Examples of eukaryote cells are a mammalian cell, an insect cell, a
plant cell or a fungal cell. Useful mammalian cells include Chinese
hamster ovary (CHO) cells, HeLa cells, baby hamster kidney (BHK)
cells, COS cells, or any number of other immortalized cell lines
available, e.g., from the American Type Culture Collection.
[0167] In a preferred embodiment, the host cell is a fungal
cell.
[0168] Fungal cells may be transformed by a process involving
protoplast formation, transformation of the protoplasts, and
regeneration of the cell wall in a manner known per se.
[0169] The present invention also relates to a transgenic plant,
plant part, such as a plant seed, or plant cell, which has been
transformed with a DNA sequence encoding the phytase of the
invention so as to express or produce this enzyme. Also
compositions and uses of such plant or plant part are within the
scope of the invention, especially its use as feed and food or
additives therefore, along the lines of the present use and
food/feed claims.
[0170] The transgenic plant can be dicotyledonous or
monocotyledonous, for short a dicot or a monocot. Of primary
interest are such plants which are potential food or feed
components and which comprise phytic acid. A normal phytic acid
level of feed components is 0.1-100 g/kg, or more usually 0.5-50
g/kg, most usually 0.5-20 g/kg. Examples of monocot plants are
grasses, such as meadow grass (blue grass, Poa), forage grass such
as festuca, lolium, temperate grass, such as Agrostis, and cereals,
e.g., wheat, oats, rye, barley, rice, sorghum and maize (corn).
[0171] Examples of dicot plants are legumes, such as lupins, pea,
bean and soybean, and cruciferous (family Brassicaceae), such as
cauliflower, oil seed rape and the closely related model organism
Arabidopsis thaliana.
[0172] Such transgenic plant etc. is capable of degrading its own
phytic acid, and accordingly the need for adding such enzymes to
food or feed comprising such plants is alleviated. Preferably, the
plant or plant part, e.g., the seeds, are ground or milled, and
possibly also soaked before being added to the food or feed or
before the use, e.g., intake, thereof, with a view to adapting the
speed of the enzymatic degradation to the actual use.
[0173] If desired, the plant produced enzyme can also be recovered
from the plant. In certain cases the recovery from the plant is to
be preferred with a view to securing a heat stable formulation in a
potential subsequent pelleting process.
[0174] Examples of plant parts are stem, callus, leaves, root,
fruits, seeds, tubers etc. But also any plant tissue is included in
this definition.
[0175] Any plant cell, whatever the tissue origin, is included in
the definition of plant cells above.
[0176] Also included within the scope of the invention are the
progeny of such plants, plant parts and plant cells.
[0177] The skilled man will know how to construct a DNA expression
construct for insertion into the plant in question, paying regard
i.a. to whether the enzyme should be excreted in a tissue specific
way. Of relevance for this evaluation is the stability
(pH-stability, degradability by endogenous proteases etc.) of the
phytase in the expression compartments of the plant. He will also
be able to select appropriate regulatory sequences such as promoter
and terminator sequences, and signal or transit sequences if
required (Tague et al, Plant, Phys., 86, 506, 1988).
[0178] The plant, plant part etc. can be transformed with this DNA
construct using any known method. An example of such method is the
transformation by a viral or bacterial vector such as bacterial
species of the genus Agrobacterium genetically engineered to
comprise the gene encoding the phytase of the invention. Also
methods of directly introducing the phytase DNA into the plant cell
or plant tissue are known in the art, e.g., micro injection and
electroporation (Gasser et al., Science, 244, 1293; Potrykus,
Bio/Techn. 8, 535, 1990; Shimamoto et al., Nature, 338, 274,
1989).
[0179] Following the transformation, the transformants are screened
using any method known to the skilled man, following which they are
regenerated into whole plants.
[0180] These plants etc. as well as their progeny then carry the
phytase encoding DNA as a part of their genetic equipment.
[0181] In general, reference is made to WO 91/14782 and WO
91/14772.
[0182] Agrobacterium tumefaciens mediated gene transfer is the
method of choice for generating transgenic dicots (for review
Hooykas & Schilperoort, 1992, Plant Mol. Biol. 19: 15-38),
however it can also be used for transforming monocots. Due to host
range limitations it is generally not possible to transform
monocots with the help of A. tumefaciens. Here, other methods have
to be employed. The method of choice for generating transgenic
monocots is particle bombardment (microscopic gold or tungsten
particles coated with the transforming DNA) of embryonic calli or
developing embryos (Christou, 1992, Plant J. 2: 275-281; Shimamoto,
1994, Curr. Opin. Biotechnol. 5: 158-162; Vasil et al., 1992,
Bio/Technology 10: 667-674).
[0183] Also other systems for the delivery of free DNA into these
plants, including viral vectors (Joshi & Joshi, 1991, FEBS
Lett. 281: 1-8), protoplast transformation via polyethylene glycol
or electroporation (for review see Potyrkus, 1991, Annu. Rev. Plant
Physiol. Plant Mol. Biol. 42: 205-225), microinjection of DNA into
mesophyll protoplasts (Crossway et al., 1986, Mol. Gen. Genet. 202:
79-85), and macroinjection of DNA into young floral tillers of
cereal plants (de la Pena et al., 1987, Nature 325: 274-276) are
preferred methods.
[0184] In general, the cDNA or gene encoding the phytase variant of
the invention is placed in an expression cassette (e.g., Pietrzak
et al., 1986, Nucleic Acids Res. 14: 5857-5868) consisting of a
suitable promoter active in the target plant and a suitable
terminator (termination of transcription). This cassette (of course
including a suitable selection marker, see below) will be
transformed into the plant as such in case of monocots via particle
bombardment. In case of dicots the expression cassette is placed
first into a suitable vector providing the T-DNA borders and a
suitable selection marker which in turn are transformed into
Agrobacterium tumefaciens. Dicots will be transformed via the
Agrobacterium harboring the expression cassette and selection
marker flanked by T-DNA following standard protocols (e.g., Akama
et al., 1992, Plant Cell Reports 12: 7-11). The transfer of T-DNA
from Agrobacterium to the Plant cell has been recently reviewed
(Zupan & Zambryski, 1995, Plant Physiol. 107: 1041-1047).
Vectors for plant transformation via Agrobacterium are commercially
available or can be obtained from many labs that construct such
vectors (e.g., Deblaere et al., 1985, Nucleic Acids Res. 13:
4777-4788; for review see Klee et al., 1987, Annu. Rev. Plant
Physiol. 38: 467-486).
[0185] Available plant promoters: Depending on the process under
manipulation, organ- and/or cell-specific expression as well as
appropriate developmental and environmental control may be
required. For instance, it is desirable to express a phytase cDNA
in maize endosperm etc. The most commonly used promoter has been
the constitutive 35S-CaMV promoter Franck et al., 1980, Cell 21:
285-294). Expression will be more or less equal throughout the
whole plant. This promoter has been used successfully to engineer
herbicide- and pathogen-resistant plants (for review see Stitt
& Sonnewald, 1995, Annu. Rev. Plant Physiol. Plant Mol. Biol.
46: 341-368). Organ-specific promoters have been reported for
storage sink tissues such as seeds, potato tubers, and fruits
(Edwards & Coruzzi, 1990, Annu. Rev. Genet. 24: 275-303), and
for metabolic sink tissues such as meristems (Ito et al., 1994,
Plant Mol. Biol. 24: 863-878).
[0186] The medium used to culture the transformed host cells may be
any conventional medium suitable for growing the host cells in
question. The expressed phytase may conveniently be secreted into
the culture medium and may be recovered therefrom by well-known
procedures including separating the cells from the medium by
centrifugation or filtration, precipitating proteinaceous
com-ponents of the medium by means of a salt such as ammonium
sulphate, followed by chromatographic procedures such as ion
exchange chromatography, affinity chromatography, or the like.
[0187] Preferred host cells are a strain of Fusarium, Hansenula,
Trichoderina or Aspergillus, in particular a strain of Fusarium
graminearum, Fusarium venenatum, Fusarium cerealis, Fusarium sp.
having the identifying characteristic of Fusarium ATCC 20334, as
further described in PCT/US/95/07743, Hansenula polymorpha,
Trichoderma harzianum or Trichoderma reesei, Aspergillus niger or
Aspergillus oryzae.
[0188] References for expression in Hansenula polymorpha:
Gellissen, G., Piontek, M., Dahlems, U., Jenzelewski, V., Gavagan,
J. E., DiCosimo, R., Anton, D. I. & Janowicz, Z. A., 1996,
Recombinant Hansenula polymorpha as a biocatalyst: coexpression of
the spinach glycolate oxidase (GO) and the S. cerevisiae catalase T
(CTT1) gene. Appl. Microbiol. Biotechnol. 46, 46-54.
[0189] Some more specific uses of the phytase variants according to
the invention appear from PCT/DK97/00568, the last pages of the
detailed description of the invention section.
[0190] In a preferred embodiment, the phytase variant of the
invention is essentially free of other non-phytase polypeptides,
e.g., at least about 20% pure, preferably at least about 40% pure,
more preferably about 60% pure, even more preferably about 80%
pure, most preferably about 90% pure, and even most preferably
about 95% pure, as determined by SDS-PAGE. Sometimes such
polypeptide is alternatively referred to as a "purified" and/or
"isolated" phytase.
[0191] A phytase polypeptide which comprises a phytase variant of
the invention includes fused polypeptides or cleavable fusion
polypeptides in which another polypeptide is fused at the
N-terminus or the C-terminus of the polypeptide or fragment
thereof. A fused polypeptide is produced by fusing a nucleic acid
sequence (or a portion thereof) encoding another polypeptide to a
nucleic acid sequence (or a portion thereof) encoding a phytase
variant of the present invention. Techniques for producing fusion
polypeptides are known in the art, and include, ligating the coding
sequences encoding the polypeptides so that they are in frame and
that expression of the fused polypeptide is under control of the
same promoter(s) and terminator.
[0192] A "feed" and a "food," respectively, means any natural or
artificial diet, meal or the like or components of such meals
intended or suitable for being eaten, taken in, digested, by an
animal and a human being, respectively.
[0193] The phytase variant of the invention may exert its effect in
vitro or in vivo, i.e., before intake or in the stomach of the
individual, respectively. Also a combined action is possible.
[0194] A phytase composition according to the invention always
comprises at least one phytase of the invention.
[0195] Generally, phytase compositions are liquid or dry.
[0196] Liquid compositions need not contain anything more than the
phytase enzyme, preferably in a highly purified form. Usually,
however, a stabilizer such as glycerol, sorbitol or mono propylen
glycol is also added. The liquid composition may also comprise
other additives, such as salts, sugars, preservatives, pH-adjusting
agents, proteins, phytate (a phytase substrate). Typical liquid
compositions are aqueous or oil-based slurries. The liquid
compositions can be added to a food or feed after an optional
pelleting thereof.
[0197] Dry compositions may be spray-dried compositions, in which
case the composition need not contain anything more than the enzyme
in a dry form. Usually, however, dry compositions are so-called
granulates which may readily be mixed with e.g., food or feed
components, or more preferably, form a component of a pre-mix. The
particle size of the enzyme granulates preferably is compatible
with that of the other components of the mixture. This provides a
safe and convenient means of incorporating enzymes into e.g.,
animal feed.
[0198] Agglomeration granulates are prepared using agglomeration
technique in a high shear mixer (e.g., Lodige) during which a
filler material and the enzyme are co-agglomerated to form
granules. Absorption granulates are prepared by having cores of a
carrier material to absorb/be coated by the enzyme.
[0199] Typical filler materials are salts such as disodium
sulphate. Other fillers are kaolin, talc, magnesium aluminium
silicate and cellulose fibers. Optionally, binders such as dextrins
are also included in agglomeration granulates.
[0200] Typical carrier materials are starch, e.g., in the form of
cassava, corn, potato, rice and wheat. Salts may also be used.
[0201] Optionally, the granulates are coated with a coating
mixture. Such mixture comprises coating agents, preferably
hydrophobic coating agents, such as hydrogenated palm oil and beef
tallow, and if desired other additives, such as calcium carbonate
or kaolin.
[0202] Additionally, phytase compositions may contain other
substituents such as colouring agents, aroma compounds,
stabilizers, vitamins, minerals, other feed or food enhancing
enzymes, i.e., enzymes that enhance the nutritional properties of
feed/food, etc. This is so in particular for the so-called
pre-mixes.
[0203] A "food or feed additive" is an essentially pure compound or
a multi component composition intended for or suitable for being
added to food or feed. In particular it is a substance which by its
intended use is becoming a component of a food or feed product or
affects any characteristics of a food or feed product. It is
composed as indicated for phytase compositions above. A typical
additive usually comprises one or more compounds such as vitamins,
minerals or feed enhancing enzymes and suitable carriers and/or
excipients.
[0204] In a preferred embodiment, the phytase compositions of the
invention additionally comprises an effective amount of one or more
feed enhancing enzymes, in particular feed enhancing enzymes
selected from the group consisting of alpha-galactosidases,
beta-galactosidases, in particular lactases, other phytases,
beta-glucanases, in particular beta-1,4-endoglucanases and
beta-1,3(4)-endoglucanases, cellulases, xylosidases, galactanases,
in particular arabinogalactan beta-1,4-endogalactosidases and
arabinogalactan beta-1,3-endogalactosidases, endoglucanases, in
particular beta-1,2-endoglucanase, alpha-1,3-endoglucanase, and
beta-1,3-endoglucanase, pectin degrading enzymes, in particular
pectinases, pectinesterases, pectin lyases, polygalacturonases,
arabinanases, rhamnogalacturonases, rhamnogalacturonan acetyl
esterases, rhamnogalacturonan-alpha-rhamnosidase, pectate lyases,
and alpha-galacturonisidases, mannanases, beta-mannosidases, mannan
acetyl esterases, xylan acetyl esterases, proteases, xylanases,
arabinoxylanases and lipolytic enzymes such as lipases,
phospholipases and cutinases.
[0205] The animal feed additive of the invention is supplemented to
the mono-gastric animal before or simultaneously with the diet.
Preferably, the animal feed additive of the invention is
supplemented to the mono-gastric animal simultaneously with the
diet. In a more preferred embodiment, the animal feed additive is
added to the diet in the form of a granulate or a stabilized
liquid.
[0206] An effective amount of phytase in food or feed is from about
10-20.000; preferably from about 10 to 15.000, more preferably from
about 10 to 10.000, in particular from about 100 to 5.000,
especially from about 100 to about 2.000 FYT/kg feed or food.
[0207] Examples of other specific uses of the phytase of the
invention are in soy processing and in the manufacture of inositol
or derivatives thereof.
[0208] The invention also relates to a method for reducing phytate
levels in animal manure, wherein the animal is fed a feed
comprising an effective amount of the phytase of the invention.
[0209] Also comprised in this invention is the use of a phytase of
the invention during the preparation of food or feed preparations
or additives, i.e., the phytase exerts its phytase activity during
the manufacture only and is not active in the final food or feed
product. This aspect is relevant for instance in dough making and
baking.
[0210] The invention relates to a phytase variant which, when
aligned according to FIG. 1, is amended as compared to a model
phytase in at least one of the following positions, using the
position numbering corresponding to P.sub.--lycii:
24; 27; 31; 33; 39; 40; 41; 42; 43; 44; 45; 46; 47; 49; 51; 56; 58;
59; 61; 62; 68; 69; 70; 71; 72; 73; 74; 75; 76; 77; 78; 79; 80; 81;
82; 83; 84; 88; 90; 102; 115; 116; 117; 118; 119; 120; 121; 122;
123; 124; 125; 126; 127; 128; 132; 143; 148; 149; 150; 151; 152;
153; 154; 155; 156; 157; 158; 159; 160; 161; 162; 163; 170f; 170g;
171; 172; 173; 184; 185; 186; 187; 187a; 190; 191; 192; 193; 194;
195; 198; 199; 200; 201; 201a; 201b; 201c; 201d; 201e; 201f; 202;
203; 203a; 204; 205; 211; 215; 220; 223; 228; 232; 233; 234; 235;
236; 237; 238; 239; 242; 243; 244; 246; 251e; 253; 256; 260; 264;
265; 267; 270; 271; 272; 273; 274; 275; 276; 277; 278; 279; 280;
283; 285; 287; 288; 292; 293; 302; 304; 332; 333; 334; 335; 336;
337; 338; 339; 340; 341; 342; 343; 348; 349; 352; 360; 362; 364;
365; 366; 367; 368; 369; 370; 371; 372; 373; 374; 375; 376; 383k;
387; 393; 394; 396; 404; 409; 411; 412; 413; 417; 421; 431.
[0211] From these variants we expect amended characteristics,
preferably amended activity characteristics. In fact, for several
variants such amended characteristics have already been shown (see
the experimental part). Like above, "amended" means as compared to
the model phytase. "Amended activity characteristics" means amended
in at least one phytase activity related respect, such as
(non-exclusive list): pH stability, temperature stability, pH
profile, temperature profile, specific activity (in particular in
relation to pH and temperature), substrate specificity, substrate
cleavage pattern, substrate binding, position specificity, the
velocity and level of release of phosphate from corn, reaction
rate, phytate degradation rate), end level of released phosphate
reached.
[0212] Preferred amended activity characteristics are amended
specific activity, preferably increased, and preferably increased
at a pH of 3, 4, 5, or 6; amended pH or temperature profile; and/or
amended, preferably increased, thermostability, e.g., of an
increased melting temperature as measured using DSC.
[0213] Preferred phytase variants are: Phytase variants which, when
aligned according to FIG. 1, are amended as compared to a model
phytase in at least one of the following positions, using the
position numbering corresponding to P.sub.--lycii:
43; 44; 47; 51; 58; 62; 78; 80; 83; 88; 90; 102; 143; 148; 153;
154; 186; 187a; 195; 198; 201e; 204; 205; 211; 215; 220; 242; 244;
251e; 260; 264; 265; 267; 270; 273; 278; 302; 336; 337; 339; 352;
365; 373; 383k; 404; 417.
[0214] The following variants of A.sub.--fumigatus constitute a
subgroup: Q43L; Q270L; G273D,K; N336S; A205E; Y278H; Q43L+Q270L;
Q43L+Q270L+G273D; Q43L+Q270L+G273D+N336S; G273K+A205E;
G273K+A205E+Y278H (see EP 0897010).
[0215] Generally, variants of the invention can be deduced or
identified as follows: Looking at the alignment according to FIG.
1, comparing two sequences, one of which is a model phytase with
improved properties, identifying amino acid differences in relevant
positions/areas, and transferring (substituting with) from the
model to the other phytase sequence the amino acid in a relevant
position.
[0216] The invention also relates to a process for preparing a
phytase variant which includes the above method, and further
includes the deducement and synthesis of the corresponding DNA
sequence, the transformation of a host cell, the cultivation of the
host cell and the recovery of the phytase variant.
[0217] Relevant positions/areas include those mentioned below in
relation to important phytase activity characteristics such as
specific activity, thermostability, pH activity/stability.
[0218] The present invention also relates to phytase variants
(varied according to a model phytase as defined herein) which are
obtainable, preferably obtained, by the process outlined above and
which are expected to exhibit an amended characteristic/property,
preferably does exhibit such amended characteristic, e.g., an
improved specific activity.
[0219] At least the basidiomycete model phytases P.sub.--lycii and
T.sub.--pubescens exhibit a high specific activity (as determined
using the method of Example 2 herein).
[0220] This is an example of a desired property which can be
transferred to other phytases, e.g., the other phytases listed in
FIG. 1, in particular to the A.sub.--pediades and the ascomycete
phytases such as A.sub.--fumigatus, A-ficuum, consphyA, by a
deducement process such as the one mentioned above.
[0221] Thus, amended specific activity, in particular an improved
specific activity, in particular at low pH and/or high temperature,
is expected from variants, which have been amended in relevant
areas, viz. (i) in the amino acid residues which point into the
active site cleft; or (ii) in the amino acid residues in the close
neighbourhood of these active site residues. Preferably, close
neighbourhood means within 10 Angstroms from the active site
residues.
[0222] From the pdb file 1IHP (Brookhaven Database entry of
18.03.98 re 1IHP, Structure of Phosphomonoesterase, D. Kostrewa; or
as published in Nature Structural Biology, 4, 1997, p. 185-190),
active site regions can be identified, using the program INSIGHTII
from Molecular Simulations MSI, San Diego, Calif., and using the
subset command, an "active site shell" can be defined comprising
those amino acid residues which lie close to the catalytic
residues, defined as H59, D339 and R58 in A. ficuum phytase
(corresponding to Peniophora numbers H71, D335 and R70,
respectively). An "active site shell (10 Angstroms)" comprises
those residues which lie within 10 Angstroms from the above
catalytic residues.
[0223] The residues within 10 Angstroms from H71 and D335 are the
following (using Peniophora numbers): 41-47, 68-77, 115-118,
120-126, 128, 149-163, 185, 191-193, 199, 243, 270-271, 273-275,
277-279, 288, 332-343, 364-367, 369-375, 394 ("the active site
shell (10 Angstroms)").
[0224] Preferably, a "substrate binding shell" can also be defined
which comprises those residues which are in close proximity to the
substrate binding site and which can therefore be expected to be in
contact with the substrate.
[0225] This information can be deduced as described above, by
docking a sugar analogue to phytin into the active site cleft (the
residues making up the surface of the active site). If a sugar
without any phosphate groups is docked into the active site cleft,
e.g., alpha-D-glucose (chair conformation, structure provided by
the INSIGHTII program), using a fixed distance as shown below, the
residues pointing towards the active site cleft can be extracted
using the subset command and using a distance of 10 Angstroms from
the substrate analogue. Alternatively, the compound
inositol-1,4,5-triphosphate (Brookhaven database file 1djx.
Inositol-1,4,5-triphosphate) can be docked into the active site
cleft. This compound and glucose, however, are more or less
superimposable.
[0226] The distances in Angstroms are: From oxygen atom in position
6 of the alpha-D-glucose to
[0227] atom ND1 of H59: 5.84
[0228] atom NH2 of R58: 6.77
[0229] atom NH2 of R142: 5.09
[0230] atom ND2 of N340: 3.00
[0231] atom ND1 of H59: 7.76
[0232] atom NH2 of R58: 8.58
(the Peniophora numbers of the above residues are: H71, R70, R155,
N336, H71 and R70, respectively).
[0233] In this way, the residues in contact with the substrate are
identified as follows (Peniophora numbers): 43-44; 70-80; 83-84;
115; 153; 155-156; 184; 191-192; 198-202; 205; 235; 238; 242; 270;
272-273; 275-277; 332-336; 338; 369; 371 ("the substrate binding
shell (10 Angstroms)").
[0234] Variants being amended in one or more of (1) the active site
shell or (2) the substrate binding shell are strongly expected to
have an amended specific activity. This leads to the following
joint grouping of positions (still Peniophora numbers and 10
Angstrom shells): 41-47, 68-80, 83-84, 115-118, 120-126, 128,
149-163, 184-185, 191-193, 198-201e, 202-203, 205, 235-236,
238-239, 242-243, 270-279, 285, 288, 332-343, 364-367, 369-375,
394.
[0235] Preferably, the active site shell and the substrate binding
shell are defined as described above using the basidiomycete model
phytases of FIG. 1, the Peniophora phytase being a preferred model.
A deducement of corresponding variants of other model phytases is
possible using the alignment of FIG. 1.
[0236] In a preferred embodiment, a distance of 5 Angstroms is used
in the subset command, thus defining active site and substrate
binding shells of a more limited size, e.g., an active site shell
comprising the residues 43-44, 69-74, 117, 125, 155-156, 159, 274,
332-340, 370-374 (5 Angstroms from H71 and D335), "active site
shell (5 Angstroms)".
[0237] Generally the active site shell and substrate binding shell
regions form the basis for selecting random mutagenesis regions.
Examples of preferred random mutagenesis regions are
[0238] regions 69-74, 332-340, 370-374, doping to be added (a 5
Angstrom approach); and
[0239] regions 57-62, 142-146, 337-343, doping to be added (a 10
Angstrom approach).
[0240] It is presently contemplated that any amendment in either of
these positions will lead to a phytase of amended characteristics,
e.g., of an amended specific activity.
[0241] The above expression "any amendment in either of the
positions" is considered fully equivalent to listing each position
and each substitution, e.g., as follows for the above sub-group
41-47:
41A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
42A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
43A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
44A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
45A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
46A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y;
47A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y.
[0242] In a preferred embodiment, amended specific activity is
expected from the following variants:
[0243] 42S,G; 43A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y; 45D,S;
47Y,F; 51E,A; 75W,F; 78S,D; 79G; 80K,A; 83I,Q; 84Q,V; 116S; 118V,L;
119E; 120L; 122A; 123N,T; 125S; 126H,S; 127Q,E; 128A,T; 151A,S;
152G; 153D,Y; 154Q,D,G; 157V; 158D,A; 159T; 160A,S; 161T,N; 162N;
163W; 184Q,S; 186A,E; 198A,N; 200G,V; 201D; deletions of one or
more of 201a, 201b, 201c, 201d, 201e, 201f--preferably all; 202S;
205Q,E; 235Y,L; 238L,M; 242P; 270Y,A,L; 271D; 273D,K; 275F,Y;
278T,H; 332F; 336S; 337T,Q; 339V; 340P,A; 343A,S; 364W,F; 365V,L;
366D,V; 367K; 368K; 369I,L; 370V; 373S; 374A; 375H; 376M; 393V.
[0244] Particularly preferred variants are the following: 78S; 79G;
80A; 83I,Q; 84Q,V; 198A,N; 200G,V; 201D; deletions in one or more
of 201a, 201b, 201c, 201d, 201e, 201f--preferably all deletions;
202S; 205Q,E; 235Y,L; 238L,M; 242P, 273D; 275F,Y.
[0245] Other particularly preferred variants are the following:
43A,C,D,E,F,G,H,I,K,L,M,N,P,Q,R,S,T,V,W,Y; in particular 43M,P;
75W,F; 80K; 153D; 184Q,S; 270Y,A; 332F; 369I,L.
[0246] The following variants are especially preferred:
43L,G,N,V,A,I,T; 78D; 153Y; 154G; 270L; 273D,K. Double and triple
variants (43L/270L); (43L/270L/273D); (43L/78D) and (43L/153Y/154G)
are also especially preferred. Other preferred variants are 205E;
278H; 336s.
[0247] These especially preferred single, double and triple
variants are preferably variants of model phytases which can be
aligned to FIG. 1, in particular variants of the specific model
phytases listed in FIG. 1.
[0248] At least consphyA is known to have a high thermostability.
Still further, the thermostability of P.sub.--lycii is rather
high.
[0249] This is an example of a desired property which can be
transferred to other phytases, e.g., the other phytases listed in
FIG. 1, in particular to the basidiomycete phytases such as
P.sub.--lycii and A.sub.--pediades, by a deducement process such as
the one mentioned above.
[0250] Amended thermostability, in particular improved
thermostability, is expected on this background from the following
variants:
[0251] 39H,S; 40L,N; 43P; 47Y,F; 49P; 51E,A; 56P; 58D; 61R; 62V;
80K; 83A; 84Y; 172P; 184P; 195T; 198A; 204V; 211L; 223D; 236Y;
242P; 246V; 253P; 264R; 265Q; 280A,P; 283P; 287A; 292F,Y; 293A;
302R; 304P; 337S; 348Y; 387P; 396R; 409R; 411K; 412R; 417E;
421F,Y.
[0252] The following variants of amended thermostability are
particularly preferred: 39S; 40N; 47Y,F; 51A; 83A; 195T; 204V;
211L; 242P; 265A.
[0253] Further variants of amended thermostability are the
following: 42G; 43T,L,G; 44N; 58K,A; 59G; 62I; 69Q; 75F; 78D; 79G;
80A; 81A,G; 82T; 83K,R; 84I; 88I; 90R,A; 102Y; 115N; 118V; 122A;
123Q,N; 125M,S; 126V,S; 127N,Q; 128S,A; 143N,K; 148V,I; 154S; 158D;
170fH; 170gA; 171T,N; 172N; 173W, 184S; 186A; 187A; 187aS; 193S;
195V,L; 198V; 201E; 201eT; 202A, 203aT; 204A; 211V, 215P,A; 220L,N;
223H; 228N; 232T; 322E; 235T; 236N; 242s; 244D; 251eQ,E; 256D;
264I; 260A,H; 265A; 267D; 270G; 271D; 273K,D; 278T,H; 287T; 293V;
302H; 337T,G; 338I; 339V,I; 340A; 352K; 365A,S; 366S; 367A; 369L;
373S,A; 374S; 376M; 383kE,Q; 404G,A; 411T; 417R; 431E.
[0254] Other concepts of the invention, which can be expected to
impart an improved thermostability to a phytase, are as
follows--considering the 1IHP structure previously referred to and
transferring via an alignment according to FIG. 1 as outlined
herein:
(A) Introduction of proline residues in spatial positions where the
prolin special dihedral angles are satisfied and the hydrogen
bonding network are not hampered and no steric clashes are
observed. (B) Filling up holes: By substitution for bigger residues
in internal cavities an improvement in stability can often be
obtained. (C) Cystin bridge: Cystin bridges will often make the
proteins more rigid and increase the energy of unfolding.
[0255] Further variants from which amended thermostability is
expected according to these concepts of (A) to (C) are: 27P, 31Y,
132F, 132I, 132L, 184P, 186P, 190P, 280P, 343F, 343I, 343L, 349P,
362P and (33C and 24C).
[0256] Concept (A): 27P, 184P, 186P, 190P, 349P, 362P.
[0257] Concept (B): 343F,I,L; 31Y; 132F,I,L; 273F.
[0258] Concept (C): 33C/24C.
[0259] Amended pH activity or stability, preferably stability, in
particular at low pH, in particular improved, is another desired
property which can be transferred by aligning according to FIG. 1
and transferring from models of improved pH profiles to other
phytases--as outlined above.
[0260] Other concepts of the invention, which can be expected to
impart an improved stability at low pH to a phytase, are as
follows--considering the 1IHP structure previously referred to and
transferring via an alignment according to FIG. 1 as outlined
herein:
(D) Surface charges: Better distribution at low pH, to avoid
cluster of negative or positive, and to avoid too close same
charged residues. (E) Prevent deamidation: Surface exposed Q or N
in close contact to negative charged residues.
[0261] Phytase variants having improved pH stability/activity at
low pH are expected to be: 39H; 39Q; 80A; 203R; 271N; 51R; 154S;
185S; 194S; 194T; 288L; 288I; 288F; 360R; 173Q,S; 204Q,S; 303K,S;
81Q,E.
[0262] Concept (D): 203R, 271N, 51R, 185S, 360R; 173Q,S; 204Q,S;
303K,S; 81Q,E.
[0263] Concept (E): 154S; 194S,T; 288L,I,F.
[0264] A preferred model phytase for these concepts of (D) and (E)
is P.sub.--lycii.
[0265] Experimentally proven to have a lowered pH optimum is:
Variant 80A of ascomycete phytases, in particular of
A.sub.--fumigatus and consphyA.
[0266] Especially preferred single, double and triple variants are
43L; (43L/270L) and (43L/270L/273D). These variants have a changed
pH profile. They are preferably variants of the specific model
phytases listed in FIG. 1.
[0267] For all preferred variants listed above:
[0268] the stability is preferably amended at high temperature,
viz. in the temperature range of 50-100.degree. C., in particular
60-90.degree. C., more preferably in the range of 70-90.degree.
C.;
[0269] the activity is preferably amended in a temperature range
relevant for the use in the gastro-intestinal system of animals,
e.g., 30-40.degree. C., more preferably 32-38.degree. C., most
preferably in the range of 35-38.degree. C.;
[0270] the stability is preferably amended at low pH, viz. in the
pH range of pH 1.5-7, preferably 2-6, more preferably 3-5;
[0271] the activity is preferably amended in the pH range of pH
1.5-5.5, more preferably at pH 2.5-4.5, still more preferably
3-5.
[0272] Tests for amended phytase characteristics, such as those
mentioned above, are well known in the art and any such test can be
used to compare the performance of the phytase variants with the
phytase models.
[0273] A preferred test for specific activity is given in Example
2. Preferred tests for pH and temperature activity and stability
are given in Example 3. An even more preferred test for thermal
stability is the DSC method of Example 4.
[0274] WO 98/28409 discloses tests for various other parameters,
too, such as position specificity. All the tests of WO 98/28409 are
preferred tests.
[0275] Generally, of course all these tests can be conducted at
desired pH values and temperatures.
[0276] In the dependent claims, some preferred phytase variants
based on five of the thirteen herein specifically disclosed model
phytases are specified.
[0277] In an analogous way other preferred variants based on the
remaining eight specifically disclosed model phytases can easily be
deduced by combining the suggested amendments with each of the
corresponding sequences of FIG. 1. These preferred variants are
specifically included in the present invention, and they are easily
deduced, viz. the following:
[0278] Variants of a model phytase derived from Paxillus,
preferably Paxillus involutus, preferably derived from strain CBS
100231, preferably variants of P.sub.--involtus-A1, the sequence of
which is shown at FIG. 2, said variants comprising at least one of
the following amendments:
( )24C; T27P; F31Y; I33C; R39H,S,Q; N40L; S42G;
P43A,C,D,E,F,G,H,I,K,L,M,N,Q,R,S,T,V,W,Y; Y44N; S45D; Y47F; A51E,R;
A58D;K; Q61R; I62V; F75W; S78D; A80K; T81Q,E,G,A; R83A,I,Q,K;
I84Y,Q,V; L88I; K90R,A; F102Y; S115N; D116S; V118L; P119E; F120L;
A123N,T,Q; S125M; F126H,S,V; D127Q,E,N; A128T,S; A132F,I,L; I148V;
D151A,S; S153D,Y; D154Q,S,G; D158A; S159T; A160S; T161N; ( )170fH;
( )170gA; S171N; H172P; N173Q,S; P184Q,S; Q185S; T186A,E,P; G187A;
( )187aS; T190P,A; D193S; N194S,T; M195T,V,L; A198N,V; G200V;
D201E; ( )201eT; S202A; D203R,K,S; P203aV,T; Q204E,S,A,V; V205E;
V211L; S215A,I; L220N; A223D,H; D233E; F235Y,L,T; N236Y; L237F;
V238L,M; A242P,S; M244D; ( )251eE,Q; D253P; T256D; P260A,H;
E264R,I; A265Q; A267D; G270Y,A,L; D271N; D273K; F275Y; T278H;
Y280A,P; E283P; V287A,T; Q288L,I,F; Y292F; V293A;
N.sub.3O.sub.2R,H; A304P; N336S; L337T,Q,S,G; M 338I; V339I; A340P;
S343A,F,I,L; F348Y; R349P; A352K; P360R; R362P; W364F; R365V,L,A,S;
T366D,V,S; S367K,A; S368K; L369I; S373A; G374A,S; R375H; (
)383kQ,E; T387P; Q396R; G404A; L409R; T411K; L412R; E417R;
F421Y.
[0279] Variants of a model phytase derived from a species of the
genus Paxillus, preferably the species Paxillus involutus,
preferably derived from strain CBS 100231, preferably variants of
P.sub.--involtus-A2, the sequence of which is shown at FIG. 3, said
variants comprising at least one of the following amendments:
P24C; I27P; F31Y; I33C; R39H,S,Q; N40L; S42G;
P43A,C,D,E,F,G,H,I,K,L,M,N,Q,R,S,T,V,W,Y; Y44N; S45D; Y47F; A51E,R;
A58D,K; E61R; I62V; F75W; S78D; A80K; A81Q,E,G; R83A,I,Q,R,K;
I84Y,Q,V; L88I; K90R,A; F102Y; S115N; D116S; V118L; P119E; F120L;
A123N,T,Q; S125M; F126H,S,V; D127Q,E,N; A128T,S; V132F,I,L; D143N;
I148V; D151A,S; S153D,Y; D154Q,S,G; D158A; A160S; T161N; ( )170fH;
( )170gA; S171N; R172P; N173Q,S; P184Q,S; Q185S; T186A,E,P; G187A;
( )187aS; T190P,A; D193S; N194S,T; M195T,V,L; A198N,V; G200V;
E201D; ( )201eT; S202A; D203R,K,S; P203aV,T; Q204E,S,A,V; V205E;
S211L,V; S215A,P; L220N; A223D,H; A232T; F235Y,L,T; N236Y; L237F;
V238L,M; P242S; M244D; ( )251eE,Q; D253P; T256D; P260A,H; E264R,I;
A265Q; A267D; G270Y,A,L; D271N; D273K; F275Y; T278H; Y280A,P;
A283P; V287A,T; Q288L,I,F; Y292F; I293A,V; N.sub.3O.sub.2R,H;
A304P; N336S; L337T,Q,S,G; M338I; V339I; 340P,A; A343S,F,I,L;
F348Y; R349P; A352K; P360R; R362P; W364F; L365V,A,S; T366D,V,S;
S367K,A; S368K; V369I,L; S373A; R375H; ( )383kQ,E; T387P; Q396R;
G404A; L409R; A411K,T; L412R; E417R; Y421F.
[0280] Variants of a model phytase derived from a species of the
genus Trametes, preferably the species Trametes pubescens,
preferably derived from strain CBS 100232, preferably variants of
T.sub.--pubescens, the sequence of which is shown at FIG. 4, said
variants comprising at least one of the following amendments:
R24c; T27P; L31Y; V33C; Q39H,S; S40L,N; S42G;
M43A,C,D,E,F,G,H,I,K,L,N,P,Q,R,S,T,V,W,Y; Y44N; S45D; Y47F; A51E,R;
A58D,K; S59G; Q61R; I62V; F75W; S78D; A80K; A81Q,E,G; R83A,I,Q,K;
I84Y,Q,V; V88I; K90R,A; L102Y; D115N; V118L; T123N,Q; S125M;
S126H,V; E127Q,N; A128T,S; A132F,I,L; D143N; V148I; S151A; S153D,Y;
D154Q,S,G; A158D; A160S; N161T; ( )170fH; ( )170gA; S171N; S172P;
N173Q,S; S184Q,P; E185S; A186E,P; G187A; ( )187aS; T190P,A;
N194S,T; M195T,V,L; A198N,V; G200V; ( )201eT; S202A; D203R,K,S;
P203aV,T; Q204E,S,A,V; V205E; Q211L,V; P215A; L220N; G223D,H;
D233E; Y235L,T; N236Y; L237F; L238M; P242S; E244D; ( )251eE,Q;
E253P; Q260A,H; D264R,I; A265Q; A267D; A270Y,L,G; D271N; D273K;
F275Y; T278H; Y280A,P; V287A,T; Q288L,I,F; Y292F; I293A,V; A302R,H;
N.sub.3O.sub.4P,A; N336S; Q337T,S,G; M338I; V339I; A340P;
S343A,F,I,L; F348Y; N349P; A352K; P360R; R362P; F364W; L365V,A,S;
V366D,S; K367A; I369L; A373S; A374S; R375H; ( )383kQ,E; Q387P;
A396R; G404A; V409R; T411K; L412R; E417R; Y421F.
[0281] Variants of a model phytase derived from a species of the
genus Aspergillus, preferably the species Aspergillus nidulans,
preferably derived from strain DSM 9743, preferably variants of
A.sub.--nidulans, the sequence of which is shown at FIG. 10, said
variants comprising at least one of the following amendments:
V24C; A27P; H39S,Q; V40L,N; G42S
Q43A,C,D,E,F,G,H,I,K,L,M,N,P,R,S,T,V,W,Y; Y44N; S45D; Y47F; S49P;
E51A,R; V56P; H58D,K,A; E61R; V62I; S69Q; Y75W,F; E78D,S; S79G;
K80A; S81Q,E,A,G; K82T; A83I,Q,K,R; Y84Q,V,I; A90R; D115N; D116S;
T118V,L; I119E; F120L; E122A; N123T,Q; M125S; V126H,S; D127Q,E,N;
S128A,T; F132I,L; K143N; I148V; S151A; S153D,Y; D154Q,S,G; A158D;
S159T; A160S; E161T,N; K162N; F163W; G170fH; S170gA; ( )171N; (
)172P; K173Q,S; P184Q,S; E185S; I186A,E,P; D187A; G187aS; T190P,A;
H193S; S194T; S198A,N,V; E200G,V; N201D,E; D201e( ); E201e ( ), T;
R201f ( ) (a deletion of at least one of 201d, 201e, 201f,
preferably all); A202S; D203R,K,S; E203aV,T; I204Q,E,S,A,V;
I211L,V; P215A; L220N; D223H; K228N; E232T; N233E; I235Y,L,T;
Y236N; L237F; M238L; S242P; M246V; E251eQ; A256D; E260A,H; L264R,I;
Q270Y,A,L,G; S271D,N; S273D,K; Y275F; G278T,H; A280P; A287T;
Q288L,I,F; F292Y; T293A,V; Q302R,H; P304A; N336S; S337T,Q,G; M338I;
I339V; S340P,A; F343A,S,I,L; N349P; Q352K; S360R; Q362P; Y364W,F;
A365V,L,S; A366D,V,S; S367K,A; W368K; T369I,L; G373S,A; A374S;
R375H; A376M; E383kQ; A404G; T411K; L412R; E417R; F421Y; K431E.
[0282] Variants of a model phytase derived from a species of
Aspergillus, preferably Aspergillus terreus, preferably derived
from strain CBS 220.95, preferably variants of A.sub.--terreus, the
sequence of which is shown at FIG. 12, said variants comprising at
least one of the following amendments:
G24C; V27P; H39S,Q; K40L,N; G42S;
L43A,C,D,E,F,G,H,I,K,M,N,P,Q,R,S,T,V,W,Y; Y44N; A45D,S; Y47F; S49P;
Q51E,A,R; V56P; P58D,K,A; D59G; H61R; I62V; A69Q; S75W,F; H78D,S;
S79G; K80A; T81Q,E,A,G; A83I,Q,K,R; Y84Q,V,I; A90R; E115N; E116S;
T118V,L; P119E; F120L; R122A; N123T,Q; L125S,H; R126H,S,V;
D127Q,E,N; L128A,T,S; F132I,L; H143N; V148I; T151A,S; D152G;
A153D,Y; S154D,Q,G; H157V; E158D,A; S159T; A160S; E161T,N; K162N;
F163W; H173Q,S; P184Q,S; E185S; G186A,E,P; S187A; A187aS; T190P,A;
H193S; S194T; L195T,V; A198N,V; E200G,V; S201D,E; S201d( ); T201e(
); V201f( ); G202S,A; D203R,K,S; D203aV,T; A204Q,E,S,V; V205E;
V211L; A215P; L220N; D223H; Q228N; D232T; D233E; V235Y,L,T; N236Y;
L237F; M238L; P242S; E244E; T251eE,Q; A260H; T264R,I; Q265A; N267D;
L270Y,A,G; S271D,N; K273D; Y275F; H278T; G280A,P; V287A,T;
Q288L,I,F; W292F,Y; A293V; Q302H; P304A; N337T,Q,S,G; L338I; V339I;
S340P,A; W343A,S,F,I,L; N349P; A352K; S360R; S362P; Y364W,F;
A365V,L,S; A366D,V,S; A367K; W368K; T369I,L; A373S; A374S; R375H;
A376M; R383kQ,E; P404A,G; K411T; A417E,R; F421Y; A431E.
[0283] Variants of a model phytase derived from a species of
Talaromyces, preferably the species Talaromyces thermophilus,
preferably derived from strain ATCC 20186 or ATCC 74338, preferably
variants of T thermo, the sequence of which is shown at FIG. 13,
said variants comprising at least one of the following
amendments:
H.sub.24C; V27P; H39S,Q; S40L,N; G42S;
Q43A,C,D,E,F,G,H,I,K,L,M,N,P,R,S,T,V,W,Y; Y44N; S45D; F47Y; S49P;
A51E,R; V56P; Q58D,K,A; N59G; K61R; I62V; Y75W,F; S78D; S79G; K80A;
T81Q,E,A,G; E82T; L83A,I,Q,R,K; Y84Q,V,I; R90A; D116S; T118V,L;
P119E; F120L; E122A; N123T,Q; M125S; I126H,S,V; Q127E,N; L128A,T,S;
F132I,L; V148I; S151A; S153D,Y; D154Q,S,G; I157V; A158D; S159T;
G160A,S; R161T,N; L162N; F163W; S170gA; D171N; K172P; H173Q,S;
E184Q,S,P; E185S; G186A,E,P; D187A; T190P,A; T1933; G194S,T;
S195T,V,L; V198A,N; E200G,V; D201E; S201d( ); S201e( ),T; S201f( );
G202S,A; H203R,K,S; D203aV,T; A204Q,E,S,V; Q205E; Q211L,V; A215P;
I220N,L; H223D; D228N; S232T; D233E; P235Y,L,T; Y236N; M237F;
D238L,M; P242S; E244D; L246V; ( )251eE,Q; A256D; Q260A,H; Q264R,I;
A265Q; Q270Y,A,L,G; S271D,N; G273D,K; Y275F; N278T,H; G280A,P;
A287T; Q288L,I,F; F292Y; V293A; H302R; P304A; N336S; T337Q,S,G;
M338I; T339V,I; S340P,A; A343S,F,I,L; N349P; A352K; S360R; E362P;
Y364W,F; S365V,L,A; A366D,V,S; A367K; W368K; T369I,L; G373S,A;
G374A,S; R375H; A376M; D383kQ,E; E404A; K411T; R417E; F421Y.
[0284] Variants of a model phytase derived from a species of
Thermomyces, preferably the species Thermomyces lanuginosus,
preferably derived from strain DBS 586.94, preferably variants of
T.sub.--lanuginosa, the sequence of which is shown at FIG. 14, said
variants comprising at least one of the following amendments:
K24C; ( )27P; ( )31Y; ( )33C; R39H,S,Q; H40L,N; G42S;
Q43A,C,D,E,F,G,H,I,K,L,M,N,P,R,S,T,V,W,Y; Y44N; S45D; F47Y; S49P;
A51E,R; V56P; K58D,A; V62I; S69Q; Y75W,F; A78D,S; H79G; K80A;
S81Q,E,A,G; E82T; V83A,I,Q,K,R; Y84Q,V,I; L88I; R90A; F102Y; D115N;
N116S; T118V,L; R119E; F120L; E122A; E123N,T,Q; M125S; M126H,S,V;
E127Q,N; S128A,T; F132I,L; E143N; V148I; A151S; S153D,Y;
A154D,Q,S,G; I157V; A158D; S159T; A160S; E161T,N; F162N; F163W;
R170fH; S170gA; K172P; D173Q,S; S184Q,P; E185S; E186A,P; T187A;
G187aS; T190P,A; G193S; L194S,T; T195V,L; A198N,V; E200G,V; E201D;
A201d( ); P201e( ),T; D202S,A; P203R,K,S; T203aV; Q204E,S,A,V;
P205E; V211L; R215A,P; I220L,N; H223D; E232T; D233E; P235Y,L,T;
L236Y,N; M238L; P242S; Q251eE; H256D; Q260H; M264R,I; A265Q;
Y270A,L,G; T271D,N; D273K; Y275F; H278T; G280A,P; A283P; S287A;
R288L,I,F; F292Y; V293A; G302R,H; P304A; N336S; T337Q,S,G; M338I;
T339V,I; G340P,A; S343A,F,I,L; N349P; P360R; T362P; Y364W,F;
A365V,L,S; A366D,V,S; S367K,A; W368K; T369I,L; A373S; A374S; R375H;
A376M; E383kQ; R404A,G; R411K,T; K417E,R; F421Y; D431E.
[0285] Variants of a model phytase derived from a species of
Myceliophthora, preferably the species Myceliophthora thermophila,
preferably derived from strain ATCC 48102 or ATCC 74340, preferably
variants of M.sub.--thermophila, the sequence of which is shown at
FIG. 7, said variants comprising at least one of the following
amendments:
S24C; F31Y; H39S,Q; F40L,N; G42S;
Q43A,C,D,E,F,G,H,I,K,L,M,N,P,R,S,T,V,W,Y; Y44N; S45D; Y47F; S49P;
P51E,A,R; I56P; D58K,A; D59G; E61R; V62I; S69Q; A75W,F; L78D,S;
K79G; R80K,A; A81Q,E,G; A82T; S83A,I,Q,K,R; Y84Q,V,I; R90A; D115N;
E116S; T118V,L; R119E; T120L; Q122A; Q123N,T; M125S; V126H,S;
N127Q,E; S128A,T; F132I,L; K143N; V148I; A151S; Q153D,Y; D154Q,S,G;
H158D,A; S159T; A160S; E161T,N; G170fH; S170gA; T171N; F163W;
V172P; R173Q,S; P184Q,S; E185S; T186A,E,P; G187aS; T190P,A; N193S;
D194S,T; L195T,V; A198N,V; E200G,V; E201D; G201a( ); P201b( );
Y201c( ); S201d( ); T201e( ); I201f( ); G202S,A; D203R,K,S;
D203aV,T; A204Q,E,S,V; Q205E; T211L,V; P215A; V220N,L; N223D,H;
A232T; D233E; V235Y,L,T; A236Y,N; L237F; M238L; P242S; E244D;
A251eE,Q; R256D; E260A,H; R264I; A265Q; Q270Y,A,L,G; S271D,N;
K273D; Y275F; Y278T,H; P280A; T287A; Q288L,I,F; F292Y; V293A; (
)302R,H; P304A; N336S; D337T,Q,S,G; M338I; M339V,I; G340P,A;
G343A,S,F,I,L; D349P; P352K; D360R; E362P; Y364W,F; A365V,L,S;
A366D,V,S; S367K,A; W368K; A369I,L; A373S; A374S; R375H; I376M;
E383kQ; E387P; G404A; M409R; T411K; L412R; E417R; F421Y; D431E.
[0286] This invention also provides a new phytase which has been
derived from a strain of Cladorrhinum, viz. C. foecundissimun.
Accordingly, the invention also relates to a polypeptide having
phytase activity and which comprises SEQ ID NO: 2 or the mature
part (amino acids nos 16-495) thereof; or a polypeptide being at
least 70, more preferably 75, 80, 85, 90, 95% homologous thereto;
homology meaning similarity, preferably identity, and being
determined using the program GAP and the settings as defined
hereinabove. And the invention relates to a DNA construct which
encodes a polypeptide having phytase activity, said DNA construct
comprising a DNA molecule which comprises SEQ ID NO: 1 or
nucleotides nos. 20-70 and 207-1560 thereof; or nucleotides nos.
20-70 and 207-1563 thereof; or nucleotides nos. 65-70 and 207-1560
thereof; or nucleotides nos. 65-70 and 207-1563 thereof; or a DNA
construct or molecule which is at least 70, 75, 80, 85, 90, 95%
homologous to either of these nucleotide sequences; homology
meaning similarity, preferably identity, and being determined using
computer programs known in the art such as GAP provided in the GCG
program package (Program Manual for the Wisconsin Package, Version
8, August 1996, Genetics Computer Group, 575 Science Drive,
Madison, Wis., USA 53711) (Needleman, S. B. and Wunsch, C. D.,
(1970), Journal of Molecular Biology, 48, 443-453). Using GAP with
the following settings for DNA sequence comparison: GAP creation
penalty of 5.0 and GAP extension penalty of 0.3. The invention also
relates to a DNA construct which hybridizes with any of the above
DNA sequences under the conditions mentioned hereinabove.
EXAMPLES
Example 1
Phytase Activity Assay (FYT)
[0287] Phytase activity can be measured using the following assay:
10 microliter diluted enzyme samples (diluted in 0.1 M sodium
acetate, 0.01% Tween20, pH 5.5) are added into 250 microliters 5 mM
sodium phytate (Sigma) in 0.1 M sodium acetate, 0.01% Tween20, pH
5.5 (pH adjusted after dissolving the sodium phytate; the substrate
is preheated) and incubated for 30 minutes at 37.degree. C. The
reaction is stopped by adding 250 microliters 10% TCA and free
phosphate is measured by adding 500 microliters 7.3 g FeSO.sub.4 in
100 ml molybdate reagent (2.5 g
(NH.sub.4).sub.6Mo.sub.7O.sub.24.4H.sub.20 in 8 ml H.sub.2SO.sub.4
diluted to 250 ml). The absorbance at 750 nm is measured on 200
microliter samples in 96 well microtiter plates. Substrate and
enzyme blanks are included. A phosphate standard curve is also
included (0-2 mM phosphate). 1 FYT equals the amount of enzyme that
releases 1 micromol phosphate/min at the given conditions.
Example 2
Test for Specific Activity
[0288] The specific activity can be determined as follows:
[0289] A highly purified sample of the phytase is used (the purity
is checked beforehand on an SDS poly acryl amide gel showing the
presence of only one component).
[0290] The protein concentration in the phytase sample is
determined by amino acid analysis as follows: An aliquot of the
phytase sample is hydrolyzed in 6 N HCl, 0.1% phenol for 16 h at
110.degree. C. in an evacuated glass tube. The resulting amino
acids are quantified using an Applied Biosystems 420A amino acid
analysis system operated according to the manufacturer's
instructions. From the amounts of the amino acids the total
mass--and thus also the concentration--of protein in the hydrolyzed
aliquot can be calculated.
[0291] The activity is determined in the units of FYT. One FYT
equals the amount of enzyme that liberates 1 micromol inorganic
phosphate from phytate (5 mM phytate) per minute at pH 5.5,
37.degree. C.; assay described e.g., in example 1.
[0292] The specific activity is the value of FYT/mg enzyme
protein.
Example 3
Test for Temperature and pH Activity and Stability
[0293] Temperature and pH activity and stability can be determined
as follows:
[0294] Temperature profiles (i.e., temperature activity
relationship) by running the FYT assay of Example 1 at various
temperatures (preheating the substrate).
[0295] Temperature stability by pre-incubating the phytase in 0.1 M
sodium phosphate, pH 5.5 at various temperatures before measuring
the residual activity.
[0296] The pH-stability by incubating the enzyme at pH 3 (25 mM
glycine-HCl), pH 4-5 (25 mM sodium acetate), pH 6 (25 mM MES), pH
7-9 (25 mM Tris-HCl) for 1 hour at 40.degree. C., before measuring
the residual activity.
[0297] The pH-profiles (i.e., pH activity relationship) by running
the assay at the various pH using the same buffer-systems (50 mM,
pH re-adjusted when dissolving the substrate).
Example 4
DSC as a Preferred Test for Thermostability
[0298] The thermostability or melting temperature, Tm, can be
determined as follows:
[0299] In DSC the heat consumed to keep a constant temperature
increase in the sample-cell is measured relative to a reference
cell. A constant heating rate is kept (e.g., 90.degree. C./hour).
An endo-thermal process (heat consuming process--e.g., the
unfolding of an enzyme/protein) is observed as an increase in the
heat transferred to the cell in order to keep the constant
temperature increase.
[0300] DSC can be performed using the MC2-apparatus from MicroCal.
Cells are equilibrated 20 minutes at 20.degree. C. before scanning
to 90.degree. C. at a scan rate of 90.degree./h. Samples of e.g.,
around 2.5 mg/ml phytase in 0.1 M sodium acetate, pH 5.5 are
loaded.
Example 5
Phytase Variants of Amended Activity Characteristics
[0301] Variants of an Aspergillus fumigatus model phytase (a wild
type phytase derived from strain ATCC 13073) were prepared as
described in EP 98104858.0 (EP-A-0897010), examples 2-3 and 5, and
the phytase activity was determined as described in example 7
thereof. pH and temperature optima and melting point were
determined as described in examples 9 and 10 of EP 98113176.6
(EP-A-0897985).
[0302] In Table 1, variants of improved specific activity at pH 5.0
are listed. Table 2 lists variants of improved relative activity at
pH 3.0, and Table 3 lists variants of improved thermostability
(temperature optimum, e.g., determined by DSC).
TABLE-US-00001 TABLE 1 Amended in position Specific activity at no.
Substitution into pH 5.0 (U/mg) 43 43L 83.4 43N 45.5 43T 106.9 43I
91.2 43V 35.0 43A 27.3 43G 59.6 43 and 270 43L, 270L 88.7 43 and
270 and 273 43L, 270L, 273D 92.3 43 and 78 43L, 78D 118.5 43 and
153 and 154 43L, 153Y, 154G 193.0 A. fumigatus wild-type -- 26.5
phytase
TABLE-US-00002 TABLE 2 Amended in position Relative phytase no.
Substitution into activity at pH 3.0 205 205E 41% 273 273K 61% 278
278H 75% 273 and 205 273K, 205E 65% 273 and 278 273K, 278H 100% 273
and 205 and 278 273K, 205E, 278H 96% A. fumigatus wild-type -- 32%
phytase
TABLE-US-00003 TABLE 3 Temperature Amended in position optimum Tm
(.degree. C.) no. Substitution into (.degree. C.) (DSC) 43 and 47
and 88 and 43T, 47Y, 88I, 102Y, 60 67 102 and 220 and 242 220L,
242P, 267D and 267 as above plus 51 and as above plus 51A, 63 --
302 and 337 and 373 302H, 337T, 373A, and 115 115N A. fumigatus
wild-type -- 55 62.5 phytase
Example 6
Further Phytase Variants of Amended Activity Characteristics
[0303] Variants of the ascomycete consensus sequence "conphys" of
FIG. 9 were prepared as described in EP 98113176.6 (EP-A-0897985),
examples 4-8. Phytase activity, including pH- and temperature
optimum, and melting point was determined as described in examples
9 and 10, respectively, thereof.
[0304] The tables below list variants of amended activity
characteristics, viz.
[0305] Table 4 variants of improved specific activity at pH
6.0;
[0306] Table 5 variants of amended pH optimum (the pH-optimum
indicated is an approximate value, determined as that pH-value
(selected from the group consisting of pH 4.0; 4.5; 5.0; 5.5; 6.0;
6.5; and 7.0) at which the maximum phytase activity was
obtained);
[0307] Table 6 a variant of improved thermostability (expressed by
way of the melting point as determined by differential scanning
calorimetry (DSC)); and
[0308] Table 7 variants of amended thermostability (temperature
optimum); a "+" or "-" indicates a positive or a negative,
respectively, effect on temperature optimum of up to 1.degree. C.;
and a "++" and "- -" means a positive or a negative, respectively,
effect on temperature optimum of between 1 and 3.degree. C.
TABLE-US-00004 TABLE 4 Amended in position Specific activity at no.
Substitution into pH 6.0 (U/mg) 43 43T 130 43L 205 Conphys --
62
TABLE-US-00005 TABLE 5 Amended in position pH optimum no.
Substitution into around 43 43T 6.0 43L 5.5 43G 6.5 43 and 44 43L,
44N 6.0 43T, 44N 5.5 Conphys -- 6.0
TABLE-US-00006 TABLE 6 Amended in position no. Substitution into Tm
(.degree. C.) 43 43T 78.9 Conphys -- 78.1
TABLE-US-00007 TABLE 7 Amended in position Temperature optimum no.
Substitution into amendment 51 A + 58 K + 220 N + 195 L ++ 201e T
++ 244 D + 264 I + 302 H + 337 T ++ 352 K + 373 A ++ 47 F - 62 I -
83 K - 90 R - 143 N - 148 V -- 186 A -- 187a S - 198 V - 204 A --
211 V - 215 P -- 251e Q - 260 A - 265 A - 339 V - 365 A -- 383k E -
404 G -- 417 R -- Conphys -- 0
TABLE-US-00008 TABLE 8 Specific Amended in position Substitution Tm
(.degree. C.) activity at pH no. into (DSC) 5.0 (U/mg) 43 and 51
and 220 and 51A, 220N, 84.7 105 244 and 264 and 302 244D, 264I, and
337 and 352 and 302H, 337T, 373 352K, 373A, 43T as above plus 80 as
above plus 85.7 180 80A Conphys -- 78.1 30
Example 7
Cloning of a Phytase of Cladorrhinum foecundissimum
[0309] DNA encoding a phytase from Cladorrhinum foecundissimum CBS
427.97 has been cloned, and the enzyme isolated and purified,
essentially as described in WO 98/28409.
[0310] FIG. 2 shows the DNA sequence of the HindIII/XbaI cloned PCR
product in pA2phy8. The cloned PCR product is amplified from the
genomic region encoding Cladorrhinum foecundissimum CBS 427.97 phyA
gene. The putative intron is indicated by double underline of the
excision-ligation points in accordance with the GT-AG rule (R.
Breathnach et al., 1978, Proc. Natl. Acad. Sci. USA 75, pp.
4853-4857). The restrictions sites used for cloning are
underlined.
[0311] According to the SignalP V1.1 prediction (Henrik Nielsen,
Jacob Engelbrecht, Stren Brunak and Gunnar von Heijne:
"Identification of prokaryotic and eukaryotic signal peptides and
prediction of their cleavage sites," Protein Engineering 10, 1-6
(1997)), the signal peptide part of the enzyme corresponds to amino
acids nos. 1-15, accordingly the mature enzyme is amino acids nos.
16-495.
[0312] The enzyme exhibits a pH optimum around pH 6 with no
activity at the low pH (pH 3), but significant activity up until pH
7.5; thus it is a more alkaline phytase as compared to the
Aspergillus ficuum phytase.
[0313] A temperature optimum around 60.degree. C. was found at pH
5.5. Thus, this phytase is more thermostable than the A. ficuum
phytase.
Example 8
Alignment of a New Model Phytase According to FIG. 1
[0314] The phytase sequence of Cladorrhinum foecundissimum as
disclosed in Example 7 is compared with the 13 model phytases of
FIG. 1 using GAP version 8 referred to above with a GAP weight of
3.000 and a GAP lengthweight of 0.100. Complete amino acid
sequences are compared. The M.sub.--thermophila phytase sequence
turns up to be the most homologous sequence, showing a degree of
similarity to the C. foecundissimum sequence of 70.86%.
[0315] Still using the GAP program and the parameters mentioned
above, the phytase sequence "C.sub.--foecundissimum" is now aligned
to the "M-thermophila" phytase--see FIG. 3. The average match is
0.540; the average mismatch -0.396; quality 445.2; length 505;
ratio 0.914; gaps 9; percent similarity 70.860; percent identity
53.878.
[0316] In a next step, see FIGS. 4A-4D, the C.sub.--foecundissimum
is pasted (or it could simply be written) onto the alignment of
FIG. 1 as the bottom row, ensuring that those amino acid residues
which according to the alignment at FIG. 3 are identical (indicated
by a vertical line) or similar (indicated by one or two dots) are
placed above each other. At 5 places along the sequence, the
C.sub.--foecundissimum sequence comprises "excess" amino acid
residues, which the alignment of FIG. 1 does not make room for. At
FIGS. 4A-4D, these excess residues are transferred onto a next row
(but they can be included in the multiple alignment and numbered as
described previously in the position numbering related paragraphs
(using the denotations a, b, c etc.).
[0317] Corresponding variants of the phytase of
C.sub.--foecundissimum are then easily deduced on the basis of
FIGS. 4A-4D. Some examples: The variants generally designated
"80K,A" and "43T" in C.sub.--foecundissimum correspond to "K80A"
and "Q43T," respectively.
Sequence CWU 1
1
1511570DNACladorrhinum
foecundissimumCDS(20)..(70)sig_peptide(20)..(64)Intron(71)..(126)CDS(127)-
..(1560) 1aagcttgggc aaactcatc atg ctc atc ttg atg att cca ctg ttc
agc tac 52Met Leu Ile Leu Met Ile Pro Leu Phe Ser Tyr1 5 10ctg gct
gct gct tct ctg tgggttcatc ctttgcccct gtctcgatgt 100Leu Ala Ala Ala
Ser Leu15taaaatacta aacatatttc accaga cgt gta ctc tcc cct cag cca
gtg tcc 153Arg Val Leu Ser Pro Gln Pro Val Ser20 25tgt gac agc ccg
gag ctt ggt tac caa tgc gac cag cag aca acg cac 201Cys Asp Ser Pro
Glu Leu Gly Tyr Gln Cys Asp Gln Gln Thr Thr His30 35 40acc tgg ggt
caa tac tca ccc ttc ttc tct gtc ccg tca gag atc tcc 249Thr Trp Gly
Gln Tyr Ser Pro Phe Phe Ser Val Pro Ser Glu Ile Ser45 50 55cct tcc
gtt cct gat ggc tgc cgc ctc acc ttc gcc caa gtt ctc tcc 297Pro Ser
Val Pro Asp Gly Cys Arg Leu Thr Phe Ala Gln Val Leu Ser60 65 70cgc
cac ggc gcc cgc ttc cca acc ccg ggt aaa gcc gcc gcc atc tcc 345Arg
His Gly Ala Arg Phe Pro Thr Pro Gly Lys Ala Ala Ala Ile Ser75 80 85
90gct gtc ctc acc aaa atc aaa acc tct gcc acc tgg tac ggt tcc gac
393Ala Val Leu Thr Lys Ile Lys Thr Ser Ala Thr Trp Tyr Gly Ser
Asp95 100 105ttt cag ttc atc aag aac tac gac tat gta ctt ggc gta
gac cac ctg 441Phe Gln Phe Ile Lys Asn Tyr Asp Tyr Val Leu Gly Val
Asp His Leu110 115 120acc gcg ttc ggc gag caa gaa atg gtc aac tcc
ggc atc aag ttc tac 489Thr Ala Phe Gly Glu Gln Glu Met Val Asn Ser
Gly Ile Lys Phe Tyr125 130 135cag cgc tac tcc tcc ctc atc cag aca
gaa gac tcg gat acg ctc ccc 537Gln Arg Tyr Ser Ser Leu Ile Gln Thr
Glu Asp Ser Asp Thr Leu Pro140 145 150ttc gtc cgc gcc tct ggc cag
gaa cgc gtc atc gcc tcc gcc gag aac 585Phe Val Arg Ala Ser Gly Gln
Glu Arg Val Ile Ala Ser Ala Glu Asn155 160 165 170ttc acc acc ggc
ttc tac tcg gcc ctc tca gcc gac aag aac cct cct 633Phe Thr Thr Gly
Phe Tyr Ser Ala Leu Ser Ala Asp Lys Asn Pro Pro175 180 185tcc tcc
tta cca aga cca gaa atg gtc atc att tct gag gag cca aca 681Ser Ser
Leu Pro Arg Pro Glu Met Val Ile Ile Ser Glu Glu Pro Thr190 195
200gcc aac aac acc atg cac cac ggc ctc tgc cgc tcc ttt gaa gat tcc
729Ala Asn Asn Thr Met His His Gly Leu Cys Arg Ser Phe Glu Asp
Ser205 210 215acc acc ggc gac caa gcc caa gcg gaa ttc atc gcc gcc
acc ttc cca 777Thr Thr Gly Asp Gln Ala Gln Ala Glu Phe Ile Ala Ala
Thr Phe Pro220 225 230ccc atc acc gcc cgt ctc aac gcc caa ggt ttc
aaa ggc gtc acc ctc 825Pro Ile Thr Ala Arg Leu Asn Ala Gln Gly Phe
Lys Gly Val Thr Leu235 240 245 250tcc aac acc gac gtc cta tca cta
atg gac ctc tgc ccc ttt gac acc 873Ser Asn Thr Asp Val Leu Ser Leu
Met Asp Leu Cys Pro Phe Asp Thr255 260 265gtc gcc tac ccc ctt tcc
tcc ctc acc acc acc tct tcc gtt tct gga 921Val Ala Tyr Pro Leu Ser
Ser Leu Thr Thr Thr Ser Ser Val Ser Gly270 275 280ggc ggc aag tta
tcc ccc ttc tgc tct ctt ttc act gcc agc gac tgg 969Gly Gly Lys Leu
Ser Pro Phe Cys Ser Leu Phe Thr Ala Ser Asp Trp285 290 295aca atc
tac gat tac ctc cag tcc cta ggg aaa tac tac ggt ttc ggc 1017Thr Ile
Tyr Asp Tyr Leu Gln Ser Leu Gly Lys Tyr Tyr Gly Phe Gly300 305
310ccc ggt aat tcc cta gct gcc acc cag ggg gta ggg tac gtc aac gag
1065Pro Gly Asn Ser Leu Ala Ala Thr Gln Gly Val Gly Tyr Val Asn
Glu315 320 325 330ctt atc gcc cgc ttg atc cgt gct ccc gtc gta gat
cac acg acg acc 1113Leu Ile Ala Arg Leu Ile Arg Ala Pro Val Val Asp
His Thr Thr Thr335 340 345aac tct act ctt gat ggc gac gaa aaa acg
ttt ccg ttg aac aga acg 1161Asn Ser Thr Leu Asp Gly Asp Glu Lys Thr
Phe Pro Leu Asn Arg Thr350 355 360gtg tat gcg gat ttt tcc cat gat
aat gat atg atg aat atc ctg act 1209Val Tyr Ala Asp Phe Ser His Asp
Asn Asp Met Met Asn Ile Leu Thr365 370 375gct ttg cgg ata ttc gag
cat atc agt ccg atg gat aac acc act atc 1257Ala Leu Arg Ile Phe Glu
His Ile Ser Pro Met Asp Asn Thr Thr Ile380 385 390ccg acc aac tat
ggc cag aca gga gat gac ggg gtg aag gaa agg gat 1305Pro Thr Asn Tyr
Gly Gln Thr Gly Asp Asp Gly Val Lys Glu Arg Asp395 400 405 410ttg
ttc aag gtt agt tgg gcg gtg ccc ttt gct ggg agg gtg tac ttt 1353Leu
Phe Lys Val Ser Trp Ala Val Pro Phe Ala Gly Arg Val Tyr Phe415 420
425gag aaa atg gtt tgt gat gcg gat ggg gat ggc aag att gat agt gat
1401Glu Lys Met Val Cys Asp Ala Asp Gly Asp Gly Lys Ile Asp Ser
Asp430 435 440gag gct cag aaa gag ttg gtg agg att ttg gtt aat gat
cgg gtg atg 1449Glu Ala Gln Lys Glu Leu Val Arg Ile Leu Val Asn Asp
Arg Val Met445 450 455aga ttg aat ggg tgt gat gct gat gaa cag ggt
agg tgt gga ttg gag 1497Arg Leu Asn Gly Cys Asp Ala Asp Glu Gln Gly
Arg Cys Gly Leu Glu460 465 470aag ttt gtg gag agt atg gag ttt gcg
agg aga ggg ggg gag tgg gag 1545Lys Phe Val Glu Ser Met Glu Phe Ala
Arg Arg Gly Gly Glu Trp Glu475 480 485 490gag agg tgt ttt gtt
tagctctaga 1570Glu Arg Cys Phe Val4952495PRTCladorrhinum
foecundissimum 2Met Leu Ile Leu Met Ile Pro Leu Phe Ser Tyr Leu Ala
Ala Ala Ser1 5 10 15Leu Arg Val Leu Ser Pro Gln Pro Val Ser Cys Asp
Ser Pro Glu Leu20 25 30Gly Tyr Gln Cys Asp Gln Gln Thr Thr His Thr
Trp Gly Gln Tyr Ser35 40 45Pro Phe Phe Ser Val Pro Ser Glu Ile Ser
Pro Ser Val Pro Asp Gly50 55 60Cys Arg Leu Thr Phe Ala Gln Val Leu
Ser Arg His Gly Ala Arg Phe65 70 75 80Pro Thr Pro Gly Lys Ala Ala
Ala Ile Ser Ala Val Leu Thr Lys Ile85 90 95Lys Thr Ser Ala Thr Trp
Tyr Gly Ser Asp Phe Gln Phe Ile Lys Asn100 105 110Tyr Asp Tyr Val
Leu Gly Val Asp His Leu Thr Ala Phe Gly Glu Gln115 120 125Glu Met
Val Asn Ser Gly Ile Lys Phe Tyr Gln Arg Tyr Ser Ser Leu130 135
140Ile Gln Thr Glu Asp Ser Asp Thr Leu Pro Phe Val Arg Ala Ser
Gly145 150 155 160Gln Glu Arg Val Ile Ala Ser Ala Glu Asn Phe Thr
Thr Gly Phe Tyr165 170 175Ser Ala Leu Ser Ala Asp Lys Asn Pro Pro
Ser Ser Leu Pro Arg Pro180 185 190Glu Met Val Ile Ile Ser Glu Glu
Pro Thr Ala Asn Asn Thr Met His195 200 205His Gly Leu Cys Arg Ser
Phe Glu Asp Ser Thr Thr Gly Asp Gln Ala210 215 220Gln Ala Glu Phe
Ile Ala Ala Thr Phe Pro Pro Ile Thr Ala Arg Leu225 230 235 240Asn
Ala Gln Gly Phe Lys Gly Val Thr Leu Ser Asn Thr Asp Val Leu245 250
255Ser Leu Met Asp Leu Cys Pro Phe Asp Thr Val Ala Tyr Pro Leu
Ser260 265 270Ser Leu Thr Thr Thr Ser Ser Val Ser Gly Gly Gly Lys
Leu Ser Pro275 280 285Phe Cys Ser Leu Phe Thr Ala Ser Asp Trp Thr
Ile Tyr Asp Tyr Leu290 295 300Gln Ser Leu Gly Lys Tyr Tyr Gly Phe
Gly Pro Gly Asn Ser Leu Ala305 310 315 320Ala Thr Gln Gly Val Gly
Tyr Val Asn Glu Leu Ile Ala Arg Leu Ile325 330 335Arg Ala Pro Val
Val Asp His Thr Thr Thr Asn Ser Thr Leu Asp Gly340 345 350Asp Glu
Lys Thr Phe Pro Leu Asn Arg Thr Val Tyr Ala Asp Phe Ser355 360
365His Asp Asn Asp Met Met Asn Ile Leu Thr Ala Leu Arg Ile Phe
Glu370 375 380His Ile Ser Pro Met Asp Asn Thr Thr Ile Pro Thr Asn
Tyr Gly Gln385 390 395 400Thr Gly Asp Asp Gly Val Lys Glu Arg Asp
Leu Phe Lys Val Ser Trp405 410 415Ala Val Pro Phe Ala Gly Arg Val
Tyr Phe Glu Lys Met Val Cys Asp420 425 430Ala Asp Gly Asp Gly Lys
Ile Asp Ser Asp Glu Ala Gln Lys Glu Leu435 440 445Val Arg Ile Leu
Val Asn Asp Arg Val Met Arg Leu Asn Gly Cys Asp450 455 460Ala Asp
Glu Gln Gly Arg Cys Gly Leu Glu Lys Phe Val Glu Ser Met465 470 475
480Glu Phe Ala Arg Arg Gly Gly Glu Trp Glu Glu Arg Cys Phe Val485
490 4953478PRTPaxillus involtus 3Arg Val Leu Ser Pro Gln Pro Val
Ser Cys Asp Ser Pro Glu Leu Gly1 5 10 15Tyr Gln Cys Asp Gln Gln Thr
Thr His Thr Trp Gly Gln Tyr Ser Pro20 25 30Phe Phe Ser Val Pro Ser
Glu Ile Ser Pro Ser Val Pro Asp Gly Cys35 40 45Arg Leu Thr Phe Ala
Gln Val Leu Ser Arg His Gly Ala Arg Phe Pro50 55 60Thr Pro Gly Lys
Ala Ala Ala Ile Ser Ala Val Leu Thr Lys Ile Lys65 70 75 80Thr Ser
Ala Thr Trp Tyr Gly Ser Asp Phe Gln Phe Ile Lys Asn Tyr85 90 95Asp
Tyr Val Leu Gly Val Asp His Leu Thr Ala Phe Gly Glu Gln Glu100 105
110Met Val Asn Ser Gly Ile Lys Phe Tyr Gln Arg Tyr Ser Ser Leu
Ile115 120 125Gln Thr Glu Asp Ser Asp Thr Leu Pro Phe Val Arg Ala
Ser Gly Gln130 135 140Glu Arg Val Ile Ala Ser Ala Glu Asn Phe Thr
Thr Gly Phe Tyr Ser145 150 155 160Ala Leu Ser Ala Asp Lys Asn Pro
Pro Ser Ser Leu Pro Arg Pro Glu165 170 175Met Val Ile Ile Ser Glu
Glu Pro Thr Ala Asn Asn Thr Met His His180 185 190Gly Leu Cys Arg
Ser Phe Glu Asp Ser Thr Thr Gly Asp Gln Ala Gln195 200 205Ala Glu
Phe Ile Ala Ala Thr Phe Pro Pro Ile Thr Ala Arg Leu Asn210 215
220Ala Gln Gly Phe Lys Gly Val Thr Leu Ser Asn Thr Asp Val Leu
Ser225 230 235 240Leu Met Asp Leu Cys Pro Phe Asp Thr Val Ala Tyr
Pro Leu Ser Ser245 250 255Leu Thr Thr Thr Ser Ser Val Ser Gly Gly
Gly Lys Leu Ser Pro Phe260 265 270Cys Ser Leu Phe Thr Ala Ser Asp
Trp Thr Ile Tyr Asp Tyr Leu Gln275 280 285Ser Leu Gly Lys Tyr Tyr
Gly Phe Gly Pro Gly Asn Ser Leu Ala Ala290 295 300Thr Gln Gly Val
Gly Tyr Val Asn Glu Leu Ile Ala Arg Leu Ile Arg305 310 315 320Ala
Pro Val Val Asp His Thr Thr Thr Asn Ser Thr Leu Asp Gly Asp325 330
335Glu Lys Thr Phe Pro Leu Asn Arg Thr Val Tyr Ala Asp Phe Ser
His340 345 350Asp Asn Asp Met Met Asn Ile Leu Thr Ala Leu Arg Ile
Phe Glu His355 360 365Ile Ser Pro Met Asp Asn Thr Thr Ile Pro Thr
Asn Tyr Gly Gln Thr370 375 380Gly Asp Asp Gly Val Lys Glu Arg Asp
Leu Phe Lys Val Ser Trp Ala385 390 395 400Val Pro Phe Ala Gly Arg
Val Tyr Phe Glu Lys Met Val Cys Asp Ala405 410 415Asp Gly Asp Gly
Lys Ile Asp Ser Asp Glu Ala Gln Lys Glu Leu Val420 425 430Arg Ile
Leu Val Asn Asp Arg Val Met Arg Leu Asn Gly Cys Asp Ala435 440
445Asp Glu Gln Gly Arg Cys Gly Leu Glu Lys Phe Val Glu Ser Met
Glu450 455 460Phe Ala Arg Arg Gly Gly Glu Trp Glu Glu Arg Cys Phe
Val465 470 4754442PRTPaxillus involtus 4Met His Leu Gly Phe Val Thr
Leu Ala Cys Leu Ile His Leu Ser Glu1 5 10 15Val Phe Ala Ala Ser Val
Pro Arg Asn Ile Ala Pro Lys Phe Ser Ile20 25 30Pro Glu Ser Glu Gln
Arg Asn Trp Ser Pro Tyr Ser Pro Tyr Phe Pro35 40 45Leu Ala Glu Tyr
Lys Ala Pro Pro Ala Gly Cys Glu Ile Asn Gln Val50 55 60Asn Ile Ile
Gln Arg His Gly Ala Arg Phe Pro Thr Ser Gly Ala Ala65 70 75 80Thr
Arg Ile Lys Ala Gly Leu Ser Lys Leu Gln Ser Val Gln Asn Phe85 90
95Thr Asp Pro Lys Phe Asp Phe Ile Lys Ser Phe Thr Tyr Asp Leu
Gly100 105 110Thr Ser Asp Leu Val Pro Phe Gly Ala Ala Gln Ser Phe
Asp Ala Gly115 120 125Leu Glu Val Phe Ala Arg Tyr Ser Lys Leu Val
Ser Ser Asp Asn Leu130 135 140Pro Phe Ile Arg Ser Asp Gly Ser Asp
Arg Val Val Asp Thr Ala Thr145 150 155 160Asn Trp Thr Ala Gly Phe
Ala Ser Ala Ser Arg Asn Ala Ile Gln Pro165 170 175Lys Leu Asp Leu
Ile Leu Pro Gln Thr Gly Asn Asp Thr Leu Glu Asp180 185 190Asn Met
Cys Pro Ala Ala Gly Glu Ser Asp Pro Gln Val Asp Ala Trp195 200
205Leu Ala Ser Ala Phe Pro Ser Val Thr Ala Gln Leu Asn Ala Ala
Ala210 215 220Pro Gly Ala Asn Leu Thr Asp Ala Asp Ala Phe Asn Leu
Val Ser Leu225 230 235 240Cys Pro Phe Met Thr Val Ser Lys Glu Gln
Lys Ser Asp Phe Cys Thr245 250 255Leu Phe Glu Gly Ile Pro Gly Ser
Phe Glu Ala Phe Ala Tyr Ala Gly260 265 270Asp Leu Asp Lys Phe Tyr
Gly Thr Gly Tyr Gly Gln Ala Leu Gly Pro275 280 285Val Gln Gly Val
Gly Tyr Ile Asn Glu Leu Leu Ala Arg Leu Thr Asn290 295 300Ser Ala
Val Asn Asp Asn Thr Gln Thr Asn Arg Thr Leu Asp Ala Ala305 310 315
320Pro Asp Thr Phe Pro Leu Asn Lys Thr Met Tyr Ala Asp Phe Ser
His325 330 335Asp Asn Leu Met Val Ala Val Phe Ser Ala Met Gly Leu
Phe Arg Gln340 345 350Ser Ala Pro Leu Ser Thr Ser Thr Pro Asp Pro
Asn Arg Thr Trp Leu355 360 365Thr Ser Ser Val Val Pro Phe Ser Ala
Arg Met Ala Val Glu Arg Leu370 375 380Ser Cys Ala Gly Thr Thr Lys
Val Arg Val Leu Val Gln Asp Gln Val385 390 395 400Gln Pro Leu Glu
Phe Cys Gly Gly Asp Gln Asp Gly Leu Cys Ala Leu405 410 415Asp Lys
Phe Val Glu Ser Gln Ala Tyr Ala Arg Ser Gly Gly Ala Gly420 425
430Asp Phe Glu Lys Cys Leu Ala Thr Thr Val435 4405443PRTTrametes
pubescens 5Met Ala Phe Ser Ile Leu Ala Ser Leu Leu Phe Val Cys Tyr
Ala Tyr1 5 10 15Ala Arg Ala Val Pro Arg Ala His Ile Pro Leu Arg Asp
Thr Ser Ala20 25 30Cys Leu Asp Val Thr Arg Asp Val Gln Gln Ser Trp
Ser Met Tyr Ser35 40 45Pro Tyr Phe Pro Ala Ala Thr Tyr Val Ala Pro
Pro Ala Ser Cys Gln50 55 60Ile Asn Gln Val His Ile Ile Gln Arg His
Gly Ala Arg Phe Pro Thr65 70 75 80Ser Gly Ala Ala Lys Arg Ile Gln
Thr Ala Val Ala Lys Leu Lys Ala85 90 95Ala Ser Asn Tyr Thr Asp Pro
Leu Leu Ala Phe Val Thr Asn Tyr Thr100 105 110Tyr Ser Leu Gly Gln
Asp Ser Leu Val Glu Leu Gly Ala Thr Gln Ser115 120 125Ser Glu Ala
Gly Gln Glu Ala Phe Thr Arg Tyr Ser Ser Leu Val Ser130 135 140Ala
Asp Glu Leu Pro Phe Val Arg Ala Ser Gly Ser Asp Arg Val Val145 150
155 160Ala Thr Ala Asn Asn Trp Thr Ala Gly Phe Ala Leu Ala Ser Ser
Asn165 170 175Ser Ile Thr Pro Val Leu Ser Val Ile Ile Ser Glu Ala
Gly Asn Asp180 185 190Thr Leu Asp Asp Asn Met Cys Pro Ala Ala Gly
Asp Ser Asp Pro Gln195 200 205Val Asn Gln Trp Leu Ala Gln Phe Ala
Pro Pro Met Thr Ala Arg Leu210 215 220Asn Ala Gly Ala Pro Gly Ala
Asn Leu Thr Asp Thr Asp Thr Tyr Asn225 230 235 240Leu Leu Thr Leu
Cys Pro Phe Glu Thr Val Ala Thr Glu Arg Arg Ser245 250 255Glu Phe
Cys Asp Ile Tyr Glu Glu Leu Gln Ala Glu Asp Ala Phe Ala260 265
270Tyr Asn Ala Asp Leu Asp Lys Phe Tyr Gly Thr Gly Tyr Gly Gln
Pro275 280 285Leu Gly Pro Val Gln Gly Val Gly Tyr Ile Asn Glu Leu
Ile Ala Arg290 295 300Leu Thr Ala Gln Asn Val Ser Asp His Thr Gln
Thr Asn Ser Thr Leu305 310 315 320Asp Ser Ser Pro Glu Thr Phe Pro
Leu Asn Arg Thr Leu Tyr Ala Asp325 330 335Phe Ser His Asp Asn Gln
Met Val Ala Ile Phe Ser Ala Met Gly Leu340 345 350Phe Asn Gln Ser
Ala Pro Leu Asp Pro Thr Thr Pro Asp Pro Ala Arg355 360 365Thr Phe
Leu
Val Lys Lys Ile Val Pro Phe Ser Ala Arg Met Val Val370 375 380Glu
Arg Leu Asp Cys Gly Gly Ala Gln Ser Val Arg Leu Leu Val Asn385 390
395 400Asp Ala Val Gln Pro Leu Ala Phe Cys Gly Ala Asp Thr Ser Gly
Val405 410 415Cys Thr Leu Asp Ala Phe Val Glu Ser Gln Ala Tyr Ala
Arg Asn Asp420 425 430Gly Glu Gly Asp Phe Glu Lys Cys Phe Ala
Thr435 4406453PRTAgrocybe pediades 6Met Ser Leu Phe Ile Gly Gly Cys
Leu Leu Val Phe Leu Gln Ala Ser1 5 10 15Ala Tyr Gly Gly Val Val Gln
Ala Thr Phe Val Gln Pro Phe Phe Pro20 25 30Pro Gln Ile Gln Asp Ser
Trp Ala Ala Tyr Thr Pro Tyr Tyr Pro Val35 40 45Gln Ala Tyr Thr Pro
Pro Pro Lys Asp Cys Lys Ile Thr Gln Val Asn50 55 60Ile Ile Gln Arg
His Gly Ala Arg Phe Pro Thr Ser Gly Ala Gly Thr65 70 75 80Arg Ile
Gln Ala Ala Val Lys Lys Leu Gln Ser Ala Lys Thr Tyr Thr85 90 95Asp
Pro Arg Leu Asp Phe Leu Thr Asn Tyr Thr Tyr Thr Leu Gly His100 105
110Asp Asp Leu Val Pro Phe Gly Ala Leu Gln Ser Ser Gln Ala Gly
Glu115 120 125Glu Thr Phe Gln Arg Tyr Ser Phe Leu Val Ser Lys Glu
Asn Leu Pro130 135 140Phe Val Arg Ala Ser Ser Ser Asn Arg Val Val
Asp Ser Ala Thr Asn145 150 155 160Trp Thr Glu Gly Phe Ser Ala Ala
Ser His His Val Leu Asn Pro Ile165 170 175Leu Phe Val Ile Leu Ser
Glu Ser Leu Asn Asp Thr Leu Asp Asp Ala180 185 190Met Cys Pro Asn
Ala Gly Ser Ser Asp Pro Gln Thr Gly Ile Trp Thr195 200 205Ser Ile
Tyr Gly Thr Pro Ile Ala Asn Arg Leu Asn Gln Gln Ala Pro210 215
220Gly Ala Asn Ile Thr Ala Ala Asp Val Ser Asn Leu Ile Pro Leu
Cys225 230 235 240Ala Phe Glu Thr Ile Val Lys Glu Thr Pro Ser Pro
Phe Cys Asn Leu245 250 255Phe Thr Pro Glu Glu Phe Ala Gln Phe Glu
Tyr Phe Gly Asp Leu Asp260 265 270Lys Phe Tyr Gly Thr Gly Tyr Gly
Gln Pro Leu Gly Pro Val Gln Gly275 280 285Val Gly Tyr Ile Asn Glu
Leu Leu Ala Arg Leu Thr Glu Met Pro Val290 295 300Arg Asp Asn Thr
Gln Thr Asn Arg Thr Leu Asp Ser Ser Pro Leu Thr305 310 315 320Phe
Pro Leu Asp Arg Ser Ile Tyr Ala Asp Leu Ser His Asp Asn Gln325 330
335Met Ile Ala Ile Phe Ser Ala Met Gly Leu Phe Asn Gln Ser Ser
Pro340 345 350Leu Asp Pro Ser Phe Pro Asn Pro Lys Arg Thr Trp Val
Thr Ser Arg355 360 365Leu Thr Pro Phe Ser Ala Arg Met Val Thr Glu
Arg Leu Leu Cys Gln370 375 380Arg Asp Gly Thr Gly Ser Gly Gly Pro
Ser Arg Ile Met Arg Asn Gly385 390 395 400Asn Val Gln Thr Phe Val
Arg Ile Leu Val Asn Asp Ala Leu Gln Pro405 410 415Leu Lys Phe Cys
Gly Gly Asp Met Asp Ser Leu Cys Thr Leu Glu Ala420 425 430Phe Val
Glu Ser Gln Lys Tyr Ala Arg Glu Asp Gly Gln Gly Asp Phe435 440
445Glu Lys Cys Phe Asp4507439PRTPeniophora lycii 7Met Val Ser Ser
Ala Phe Ala Pro Ser Ile Leu Leu Ser Leu Met Ser1 5 10 15Ser Leu Ala
Leu Ser Thr Gln Phe Ser Phe Val Ala Ala Gln Leu Pro20 25 30Ile Pro
Ala Gln Asn Thr Ser Asn Trp Gly Pro Tyr Asp Pro Phe Phe35 40 45Pro
Val Glu Pro Tyr Ala Ala Pro Pro Glu Gly Cys Thr Val Thr Gln50 55
60Val Asn Leu Ile Gln Arg His Gly Ala Arg Trp Pro Thr Ser Gly Ala65
70 75 80Arg Ser Arg Gln Val Ala Ala Val Ala Lys Ile Gln Met Ala Arg
Pro85 90 95Phe Thr Asp Pro Lys Tyr Glu Phe Leu Asn Asp Phe Val Tyr
Lys Phe100 105 110Gly Val Ala Asp Leu Leu Pro Phe Gly Ala Asn Gln
Ser His Gln Thr115 120 125Gly Thr Asp Met Tyr Thr Arg Tyr Ser Thr
Leu Phe Glu Gly Gly Asp130 135 140Val Pro Phe Val Arg Ala Ala Gly
Asp Gln Arg Val Val Asp Ser Ser145 150 155 160Thr Asn Trp Thr Ala
Gly Phe Gly Asp Ala Ser Gly Glu Thr Val Leu165 170 175Pro Thr Leu
Gln Val Val Leu Gln Glu Glu Gly Asn Cys Thr Leu Cys180 185 190Asn
Asn Met Cys Pro Asn Glu Val Asp Gly Asp Glu Ser Thr Thr Trp195 200
205Leu Gly Val Phe Ala Pro Asn Ile Thr Ala Arg Leu Asn Ala Ala
Ala210 215 220Pro Ser Ala Asn Leu Ser Asp Ser Asp Ala Leu Thr Leu
Met Asp Met225 230 235 240Cys Pro Phe Asp Thr Leu Ser Ser Gly Asn
Ala Ser Pro Phe Cys Asp245 250 255Leu Phe Thr Ala Glu Glu Tyr Val
Ser Tyr Glu Tyr Tyr Tyr Asp Leu260 265 270Asp Lys Tyr Tyr Gly Thr
Gly Pro Gly Asn Ala Leu Gly Pro Val Gln275 280 285Gly Val Gly Tyr
Val Asn Glu Leu Leu Ala Arg Leu Thr Gly Gln Ala290 295 300Val Arg
Asp Glu Thr Gln Thr Asn Arg Thr Leu Asp Ser Asp Pro Ala305 310 315
320Thr Phe Pro Leu Asn Arg Thr Phe Tyr Ala Asp Phe Ser His Asp
Asn325 330 335Thr Met Val Pro Ile Phe Ala Ala Leu Gly Leu Phe Asn
Ala Thr Ala340 345 350Leu Asp Pro Leu Lys Pro Asp Glu Asn Arg Leu
Trp Val Asp Ser Lys355 360 365Leu Val Pro Phe Ser Gly His Met Thr
Val Glu Lys Leu Ala Cys Ser370 375 380Gly Lys Glu Ala Val Arg Val
Leu Val Asn Asp Ala Val Gln Pro Leu385 390 395 400Glu Phe Cys Gly
Gly Val Asp Gly Val Cys Glu Leu Ser Ala Phe Val405 410 415Glu Ser
Gln Thr Tyr Ala Arg Glu Asn Gly Gln Gly Asp Phe Ala Lys420 425
430Cys Gly Phe Val Pro Ser Glu4358465PRTAspergillus fumigatus 8Met
Val Thr Leu Thr Phe Leu Leu Ser Ala Ala Tyr Leu Leu Ser Gly1 5 10
15Arg Val Ser Ala Ala Pro Ser Ser Ala Gly Ser Lys Ser Cys Asp Thr20
25 30Val Asp Leu Gly Tyr Gln Cys Ser Pro Ala Thr Ser His Leu Trp
Gly35 40 45Gln Tyr Ser Pro Phe Phe Ser Leu Glu Asp Glu Leu Ser Val
Ser Ser50 55 60Lys Leu Pro Lys Asp Cys Arg Ile Thr Leu Val Gln Val
Leu Ser Arg65 70 75 80His Gly Ala Arg Tyr Pro Thr Ser Ser Lys Ser
Lys Lys Tyr Lys Lys85 90 95Leu Val Thr Ala Ile Gln Ala Asn Ala Thr
Asp Phe Lys Gly Lys Phe100 105 110Ala Phe Leu Lys Thr Tyr Asn Tyr
Thr Leu Gly Ala Asp Asp Leu Thr115 120 125Pro Phe Gly Glu Gln Gln
Leu Val Asn Ser Gly Ile Lys Phe Tyr Gln130 135 140Arg Tyr Lys Ala
Leu Ala Arg Ser Val Val Pro Phe Ile Arg Ala Ser145 150 155 160Gly
Ser Asp Arg Val Ile Ala Ser Gly Glu Lys Phe Ile Glu Gly Phe165 170
175Gln Gln Ala Lys Leu Ala Asp Pro Gly Ala Thr Asn Arg Ala Ala
Pro180 185 190Ala Ile Ser Val Ile Ile Pro Glu Ser Glu Thr Phe Asn
Asn Thr Leu195 200 205Asp His Gly Val Cys Thr Lys Phe Glu Ala Ser
Gln Leu Gly Asp Glu210 215 220Val Ala Ala Asn Phe Thr Ala Leu Phe
Ala Pro Asp Ile Arg Ala Arg225 230 235 240Ala Glu Lys His Leu Pro
Gly Val Thr Leu Thr Asp Glu Asp Val Val245 250 255Ser Leu Met Asp
Met Cys Ser Phe Asp Thr Val Ala Arg Thr Ser Asp260 265 270Ala Ser
Gln Leu Ser Pro Phe Cys Gln Leu Phe Thr His Asn Glu Trp275 280
285Lys Lys Tyr Asn Tyr Leu Gln Ser Leu Gly Lys Tyr Tyr Gly Tyr
Gly290 295 300Ala Gly Asn Pro Leu Gly Pro Ala Gln Gly Ile Gly Phe
Thr Asn Glu305 310 315 320Leu Ile Ala Arg Leu Thr Arg Ser Pro Val
Gln Asp His Thr Ser Thr325 330 335Asn Ser Thr Leu Val Ser Asn Pro
Ala Thr Phe Pro Leu Asn Ala Thr340 345 350Met Tyr Val Asp Phe Ser
His Asp Asn Ser Met Val Ser Ile Phe Phe355 360 365Ala Leu Gly Leu
Tyr Asn Gly Thr Glu Pro Leu Ser Arg Thr Ser Val370 375 380Glu Ser
Ala Lys Glu Leu Asp Gly Tyr Ser Ala Ser Trp Val Val Pro385 390 395
400Phe Gly Ala Arg Ala Tyr Phe Glu Thr Met Gln Cys Lys Ser Glu
Lys405 410 415Glu Pro Leu Val Arg Ala Leu Ile Asn Asp Arg Val Val
Pro Leu His420 425 430Gly Cys Asp Val Asp Lys Leu Gly Arg Cys Lys
Leu Asn Asp Phe Val435 440 445Lys Gly Leu Ser Trp Ala Arg Ser Gly
Gly Asn Trp Gly Glu Cys Phe450 455 460Ser4659467PRTArtificial
sequenceSynthetic 9Met Gly Val Phe Val Val Leu Leu Ser Ile Ala Thr
Leu Phe Gly Ser1 5 10 15Thr Ser Gly Thr Ala Leu Gly Pro Arg Gly Asn
Ser His Ser Cys Asp20 25 30Thr Val Asp Gly Gly Tyr Gln Cys Phe Pro
Glu Ile Ser His Leu Trp35 40 45Gly Gln Tyr Ser Pro Tyr Phe Ser Leu
Glu Asp Glu Ser Ala Ile Ser50 55 60Pro Asp Val Pro Asp Asp Cys Arg
Val Thr Phe Val Gln Val Leu Ser65 70 75 80Arg His Gly Ala Arg Tyr
Pro Thr Ser Ser Lys Ser Lys Ala Tyr Ser85 90 95Ala Leu Ile Glu Ala
Ile Gln Lys Asn Ala Thr Ala Phe Lys Gly Lys100 105 110Tyr Ala Phe
Leu Lys Thr Tyr Asn Tyr Thr Leu Gly Ala Asp Asp Leu115 120 125Thr
Pro Phe Gly Glu Asn Gln Met Val Asn Ser Gly Ile Lys Phe Tyr130 135
140Arg Arg Tyr Lys Ala Leu Ala Arg Lys Ile Val Pro Phe Ile Arg
Ala145 150 155 160Ser Gly Ser Asp Arg Val Ile Ala Ser Ala Glu Lys
Phe Ile Glu Gly165 170 175Phe Gln Ser Ala Lys Leu Ala Asp Pro Gly
Ser Gln Pro His Gln Ala180 185 190Ser Pro Val Ile Asp Val Ile Ile
Pro Glu Gly Ser Gly Tyr Asn Asn195 200 205Thr Leu Asp His Gly Thr
Cys Thr Ala Phe Glu Asp Ser Glu Leu Gly210 215 220Asp Asp Val Glu
Ala Asn Phe Thr Ala Leu Phe Ala Pro Ala Ile Arg225 230 235 240Ala
Arg Leu Glu Ala Asp Leu Pro Gly Val Thr Leu Thr Asp Glu Asp245 250
255Val Val Tyr Leu Met Asp Met Cys Pro Phe Glu Thr Val Ala Arg
Thr260 265 270Ser Asp Ala Thr Glu Leu Ser Pro Phe Cys Ala Leu Phe
Thr His Asp275 280 285Glu Trp Arg Gln Tyr Asp Tyr Leu Gln Ser Leu
Gly Lys Tyr Tyr Gly290 295 300Tyr Gly Ala Gly Asn Pro Leu Gly Pro
Ala Gln Gly Val Gly Phe Ala305 310 315 320Asn Glu Leu Ile Ala Arg
Leu Thr Arg Ser Pro Val Gln Asp His Thr325 330 335Ser Thr Asn His
Thr Leu Asp Ser Asn Pro Ala Thr Phe Pro Leu Asn340 345 350Ala Thr
Leu Tyr Ala Asp Phe Ser His Asp Asn Ser Met Ile Ser Ile355 360
365Phe Phe Ala Leu Gly Leu Tyr Asn Gly Thr Ala Pro Leu Ser Thr
Thr370 375 380Ser Val Glu Ser Ile Glu Glu Thr Asp Gly Tyr Ser Ala
Ser Trp Thr385 390 395 400Val Pro Phe Gly Ala Arg Ala Tyr Val Glu
Met Met Gln Cys Gln Ala405 410 415Glu Lys Glu Pro Leu Val Arg Val
Leu Val Asn Asp Arg Val Val Pro420 425 430Leu His Gly Cys Ala Val
Asp Lys Leu Gly Arg Cys Lys Arg Asp Asp435 440 445Phe Val Glu Gly
Leu Ser Phe Ala Arg Ser Gly Gly Asn Trp Ala Glu450 455 460Cys Phe
Ala46510463PRTAspergillus nidulans 10Met Ala Phe Phe Thr Val Ala
Leu Ser Leu Tyr Tyr Leu Leu Ser Arg1 5 10 15Val Ser Ala Gln Ala Pro
Val Val Gln Asn His Ser Cys Asn Thr Ala20 25 30Asp Gly Gly Tyr Gln
Cys Phe Pro Asn Val Ser His Val Trp Gly Gln35 40 45Tyr Ser Pro Tyr
Phe Ser Ile Glu Gln Glu Ser Ala Ile Ser Glu Asp50 55 60Val Pro His
Gly Cys Glu Val Thr Phe Val Gln Val Leu Ser Arg His65 70 75 80Gly
Ala Arg Tyr Pro Thr Glu Ser Lys Ser Lys Ala Tyr Ser Gly Leu85 90
95Ile Glu Ala Ile Gln Lys Asn Ala Thr Ser Phe Trp Gly Gln Tyr
Ala100 105 110Phe Leu Glu Ser Tyr Asn Tyr Thr Leu Gly Ala Asp Asp
Leu Thr Ile115 120 125Phe Gly Glu Asn Gln Met Val Asp Ser Gly Ala
Lys Phe Tyr Arg Arg130 135 140Tyr Lys Asn Leu Ala Arg Lys Asn Thr
Pro Phe Ile Arg Ala Ser Gly145 150 155 160Ser Asp Arg Val Val Ala
Ser Ala Glu Lys Phe Ile Asn Gly Phe Arg165 170 175Lys Ala Gln Leu
His Asp His Gly Ser Lys Arg Ala Thr Pro Val Val180 185 190Asn Val
Ile Ile Pro Glu Ile Asp Gly Phe Asn Asn Thr Leu Asp His195 200
205Ser Thr Cys Val Ser Phe Glu Asn Asp Glu Arg Ala Asp Glu Ile
Glu210 215 220Ala Asn Phe Thr Ala Ile Met Gly Pro Pro Ile Arg Lys
Arg Leu Glu225 230 235 240Asn Asp Leu Pro Gly Ile Lys Leu Thr Asn
Glu Asn Val Ile Tyr Leu245 250 255Met Asp Met Cys Ser Phe Asp Thr
Met Ala Arg Thr Ala His Gly Thr260 265 270Glu Leu Ser Pro Phe Cys
Ala Ile Phe Thr Glu Lys Glu Trp Leu Gln275 280 285Tyr Asp Tyr Leu
Gln Ser Leu Ser Lys Tyr Tyr Gly Tyr Gly Ala Gly290 295 300Ser Pro
Leu Gly Pro Ala Gln Gly Ile Gly Phe Thr Asn Glu Leu Ile305 310 315
320Ala Arg Leu Thr Gln Ser Pro Val Gln Asp Asn Thr Ser Thr Asn
His325 330 335Thr Leu Asp Ser Asn Pro Ala Thr Phe Pro Leu Asp Arg
Lys Leu Tyr340 345 350Ala Asp Phe Ser His Asp Asn Ser Met Ile Ser
Ile Phe Phe Ala Met355 360 365Gly Leu Tyr Asn Gly Thr Gln Pro Leu
Ser Met Asp Ser Val Glu Ser370 375 380Ile Gln Glu Met Asp Gly Tyr
Ala Ala Ser Trp Thr Val Pro Phe Gly385 390 395 400Ala Arg Ala Tyr
Phe Glu Leu Met Gln Cys Glu Lys Lys Glu Pro Leu405 410 415Val Arg
Val Leu Val Asn Asp Arg Val Val Pro Leu His Gly Cys Ala420 425
430Val Asp Lys Phe Gly Arg Cys Thr Leu Asp Asp Trp Val Glu Gly
Leu435 440 445Asn Phe Ala Arg Ser Gly Gly Asn Trp Lys Thr Cys Phe
Thr Leu450 455 46011467PRTAspergillus ficuum 11Met Gly Val Ser Ala
Val Leu Leu Pro Leu Tyr Leu Leu Ser Gly Val1 5 10 15Thr Ser Gly Leu
Ala Val Pro Ala Ser Arg Asn Gln Ser Ser Cys Asp20 25 30Thr Val Asp
Gln Gly Tyr Gln Cys Phe Ser Glu Thr Ser His Leu Trp35 40 45Gly Gln
Tyr Ala Pro Phe Phe Ser Leu Ala Asn Glu Ser Val Ile Ser50 55 60Pro
Glu Val Pro Ala Gly Cys Arg Val Thr Phe Ala Gln Val Leu Ser65 70 75
80Arg His Gly Ala Arg Tyr Pro Thr Asp Ser Lys Gly Lys Lys Tyr Ser85
90 95Ala Leu Ile Glu Glu Ile Gln Gln Asn Ala Thr Thr Phe Asp Gly
Lys100 105 110Tyr Ala Phe Leu Lys Thr Tyr Asn Tyr Ser Leu Gly Ala
Asp Asp Leu115 120 125Thr Pro Phe Gly Glu Gln Glu Leu Val Asn Ser
Gly Ile Lys Phe Tyr130 135 140Gln Arg Tyr Glu Ser Leu Thr Arg Asn
Ile Val Pro Phe Ile Arg Ser145 150 155 160Ser Gly Ser Ser Arg Val
Ile Ala Ser Gly Lys Lys Phe Ile Glu Gly165 170 175Phe Gln Ser Thr
Lys Leu Lys Asp Pro Arg Ala Gln Pro Gly Gln Ser180 185 190Ser Pro
Lys Ile Asp Val Val Ile Ser Glu Ala Ser Ser Ser Asn Asn195 200
205Thr Leu Asp Pro Gly Thr Cys Thr Val Phe Glu Asp Ser Glu Leu
Ala210 215 220Asp Thr Val Glu Ala Asn Phe Thr Ala Thr Phe Val Pro
Ser Ile Arg225 230 235 240Gln Arg Leu Glu Asn Asp Leu Ser Gly Val
Thr Leu Thr Asp Thr Glu245 250 255Val Thr Tyr Leu Met Asp Met Cys
Ser Phe Asp Thr Ile Ser Thr Ser260 265 270Thr Val Asp Thr Lys Leu
Ser Pro Phe Cys Asp Leu Phe Thr
His Asp275 280 285Glu Trp Ile Asn Tyr Asp Tyr Leu Gln Ser Leu Lys
Lys Tyr Tyr Gly290 295 300His Gly Ala Gly Asn Pro Leu Gly Pro Thr
Gln Gly Val Gly Tyr Ala305 310 315 320Asn Glu Leu Ile Ala Arg Leu
Thr His Ser Pro Val His Asp Asp Thr325 330 335Ser Ser Asn His Thr
Leu Asp Ser Ser Pro Ala Thr Phe Pro Leu Lys340 345 350Ser Thr Leu
Tyr Ala Asp Phe Ser His Asp Asn Gly Ile Ile Ser Ile355 360 365Leu
Phe Ala Leu Gly Leu Tyr Asn Gly Thr Lys Pro Leu Ser Thr Thr370 375
380Thr Val Glu Asn Ile Thr Gln Thr Asp Gly Phe Ser Ser Ala Trp
Thr385 390 395 400Val Pro Phe Ala Ser Arg Leu Tyr Val Glu Met Met
Gln Cys Gln Ala405 410 415Glu Gln Ala Pro Leu Val Arg Val Leu Val
Asn Asp Arg Val Val Pro420 425 430Leu His Gly Cys Pro Val Asp Ala
Leu Gly Arg Cys Thr Arg Asp Ser435 440 445Phe Val Arg Gly Leu Ser
Phe Ala Arg Ser Gly Gly Asp Trp Ala Glu450 455 460Cys Phe
Ala46512466PRTAspergillus terreus 12Met Gly Phe Leu Ala Ile Val Leu
Ser Val Ala Leu Leu Phe Arg Ser1 5 10 15Thr Ser Gly Thr Pro Leu Gly
Pro Arg Gly Lys His Ser Asp Cys Asn20 25 30Ser Val Asp His Gly Tyr
Gln Cys Phe Pro Glu Leu Ser His Lys Trp35 40 45Gly Leu Tyr Ala Pro
Tyr Phe Ser Leu Gln Asp Glu Ser Pro Phe Pro50 55 60Leu Asp Val Pro
Glu Asp Cys His Ile Thr Phe Val Gln Val Leu Ala65 70 75 80Arg His
Gly Ala Arg Ser Pro Thr His Ser Lys Thr Lys Ala Tyr Ala85 90 95Ala
Thr Ile Ala Ala Ile Gln Lys Ser Ala Thr Ala Phe Pro Gly Lys100 105
110Tyr Ala Phe Leu Gln Ser Tyr Asn Tyr Ser Leu Asp Ser Glu Glu
Leu115 120 125Thr Pro Phe Gly Arg Asn Gln Leu Arg Asp Leu Gly Ala
Gln Phe Tyr130 135 140Glu Arg Tyr Asn Ala Leu Thr Arg His Ile Asn
Pro Phe Val Arg Ala145 150 155 160Thr Asp Ala Ser Arg Val His Glu
Ser Ala Glu Lys Phe Val Glu Gly165 170 175Phe Gln Thr Ala Arg Gln
Asp Asp His His Ala Asn Pro His Gln Pro180 185 190Ser Pro Arg Val
Asp Val Ala Ile Pro Glu Gly Ser Ala Tyr Asn Asn195 200 205Thr Leu
Glu His Ser Leu Cys Thr Ala Phe Glu Ser Ser Thr Val Gly210 215
220Asp Asp Ala Val Ala Asn Phe Thr Ala Val Phe Ala Pro Ala Ile
Ala225 230 235 240Gln Arg Leu Glu Ala Asp Leu Pro Gly Val Gln Leu
Ser Thr Asp Asp245 250 255Val Val Asn Leu Met Ala Met Cys Pro Phe
Glu Thr Val Ser Leu Thr260 265 270Asp Asp Ala His Thr Leu Ser Pro
Phe Cys Asp Leu Phe Thr Ala Thr275 280 285Glu Trp Thr Gln Tyr Asn
Tyr Leu Leu Ser Leu Asp Lys Tyr Tyr Gly290 295 300Tyr Gly Gly Gly
Asn Pro Leu Gly Pro Val Gln Gly Val Gly Trp Ala305 310 315 320Asn
Glu Leu Met Ala Arg Leu Thr Arg Ala Pro Val His Asp His Thr325 330
335Cys Val Asn Asn Thr Leu Asp Ala Ser Pro Ala Thr Phe Pro Leu
Asn340 345 350Ala Thr Leu Tyr Ala Asp Phe Ser His Asp Ser Asn Leu
Val Ser Ile355 360 365Phe Trp Ala Leu Gly Leu Tyr Asn Gly Thr Ala
Pro Leu Ser Gln Thr370 375 380Ser Val Glu Ser Val Ser Gln Thr Asp
Gly Tyr Ala Ala Ala Trp Thr385 390 395 400Val Pro Phe Ala Ala Arg
Ala Tyr Val Glu Met Met Gln Cys Arg Ala405 410 415Glu Lys Glu Pro
Leu Val Arg Val Leu Val Asn Asp Arg Val Met Pro420 425 430Leu His
Gly Cys Pro Thr Asp Lys Leu Gly Arg Cys Lys Arg Asp Ala435 440
445Phe Val Ala Gly Leu Ser Phe Ala Gln Ala Gly Gly Asn Trp Ala
Asp450 455 460Cys Phe46513466PRTTalaromyces thermophilus 13Met Ser
Leu Leu Leu Leu Val Leu Ser Gly Gly Leu Val Ala Leu Tyr1 5 10 15Val
Ser Arg Asn Pro His Val Asp Ser His Ser Cys Asn Thr Val Glu20 25
30Gly Gly Tyr Gln Cys Arg Pro Glu Ile Ser His Ser Trp Gly Gln Tyr35
40 45Ser Pro Phe Phe Ser Leu Ala Asp Gln Ser Glu Ile Ser Pro Asp
Val50 55 60Pro Gln Asn Cys Lys Ile Thr Phe Val Gln Leu Leu Ser Arg
His Gly65 70 75 80Ala Arg Tyr Pro Thr Ser Ser Lys Thr Glu Leu Tyr
Ser Gln Leu Ile85 90 95Ser Arg Ile Gln Lys Thr Ala Thr Ala Tyr Lys
Gly Tyr Tyr Ala Phe100 105 110Leu Lys Asp Tyr Arg Tyr Gln Leu Gly
Ala Asn Asp Leu Thr Pro Phe115 120 125Gly Glu Asn Gln Met Ile Gln
Leu Gly Ile Lys Phe Tyr Asn His Tyr130 135 140Lys Ser Leu Ala Arg
Asn Ala Val Pro Phe Val Arg Cys Ser Gly Ser145 150 155 160Asp Arg
Val Ile Ala Ser Gly Arg Leu Phe Ile Glu Gly Phe Gln Ser165 170
175Ala Lys Val Leu Asp Pro His Ser Asp Lys His Asp Ala Pro Pro
Thr180 185 190Ile Asn Val Ile Ile Glu Glu Gly Pro Ser Tyr Asn Asn
Thr Leu Asp195 200 205Thr Gly Ser Cys Pro Val Phe Glu Asp Ser Ser
Gly Gly His Asp Ala210 215 220Gln Glu Lys Phe Ala Lys Gln Phe Ala
Pro Ala Ile Leu Glu Lys Ile225 230 235 240Lys Asp His Leu Pro Gly
Val Asp Leu Ala Val Ser Asp Val Pro Tyr245 250 255Leu Met Asp Leu
Cys Pro Phe Glu Thr Leu Ala Arg Asn His Thr Asp260 265 270Thr Leu
Ser Pro Phe Cys Ala Leu Ser Thr Gln Glu Glu Trp Gln Ala275 280
285Tyr Asp Tyr Tyr Gln Ser Leu Gly Lys Tyr Tyr Gly Asn Gly Gly
Gly290 295 300Asn Pro Leu Gly Pro Ala Gln Gly Val Gly Phe Val Asn
Glu Leu Ile305 310 315 320Ala Arg Met Thr His Ser Pro Val Gln Asp
Tyr Thr Thr Val Asn His325 330 335Thr Leu Asp Ser Asn Pro Ala Thr
Phe Pro Leu Asn Ala Thr Leu Tyr340 345 350Ala Asp Phe Ser His Asp
Asn Thr Met Thr Ser Ile Phe Ala Ala Leu355 360 365Gly Leu Tyr Asn
Gly Thr Ala Lys Leu Ser Thr Thr Glu Ile Lys Ser370 375 380Ile Glu
Glu Thr Asp Gly Tyr Ser Ala Ala Trp Thr Val Pro Phe Gly385 390 395
400Gly Arg Ala Tyr Ile Glu Met Met Gln Cys Asp Asp Ser Asp Glu
Pro405 410 415Val Val Arg Val Leu Val Asn Asp Arg Val Val Pro Leu
His Gly Cys420 425 430Glu Val Asp Ser Leu Gly Arg Cys Lys Arg Asp
Asp Phe Val Arg Gly435 440 445Leu Ser Phe Ala Arg Gln Gly Gly Asn
Trp Glu Gly Cys Tyr Ala Ala450 455 460Ser Glu46514475PRTThermomyces
lanuginosa 14Met Ala Gly Ile Gly Leu Gly Ser Phe Leu Val Leu Leu
Leu Gln Phe1 5 10 15Ser Ala Leu Leu Thr Ala Ser Pro Ala Ile Pro Pro
Phe Trp Arg Lys20 25 30Lys His Pro Asn Val Asp Ile Ala Arg His Trp
Gly Gln Tyr Ser Pro35 40 45Phe Phe Ser Leu Ala Glu Val Ser Glu Ile
Ser Pro Ala Val Pro Lys50 55 60Gly Cys Arg Val Glu Phe Val Gln Val
Leu Ser Arg His Gly Ala Arg65 70 75 80Tyr Pro Thr Ala His Lys Ser
Glu Val Tyr Ala Glu Leu Leu Gln Arg85 90 95Ile Gln Asp Thr Ala Thr
Glu Phe Lys Gly Asp Phe Ala Phe Leu Arg100 105 110Asp Tyr Ala Tyr
His Leu Gly Ala Asp Asn Leu Thr Arg Phe Gly Glu115 120 125Glu Gln
Met Met Glu Ser Gly Arg Gln Phe Tyr His Arg Tyr Arg Glu130 135
140Gln Ala Arg Glu Ile Val Pro Phe Val Arg Ala Ala Gly Ser Ala
Arg145 150 155 160Val Ile Ala Ser Ala Glu Phe Phe Asn Arg Gly Phe
Gln Asp Ala Lys165 170 175Asp Arg Asp Pro Arg Ser Asn Lys Asp Gln
Ala Glu Pro Val Ile Asn180 185 190Val Ile Ile Ser Glu Glu Thr Gly
Ser Asn Asn Thr Leu Asp Gly Leu195 200 205Thr Cys Pro Ala Ala Glu
Glu Ala Pro Asp Pro Thr Gln Pro Ala Glu210 215 220Phe Leu Gln Val
Phe Gly Pro Arg Val Leu Lys Lys Ile Thr Lys His225 230 235 240Met
Pro Gly Val Asn Leu Thr Leu Glu Asp Val Pro Leu Phe Met Asp245 250
255Leu Cys Pro Phe Asp Thr Val Gly Ser Asp Pro Val Leu Phe Pro
Arg260 265 270Gln Leu Ser Pro Phe Cys His Leu Phe Thr Ala Asp Asp
Trp Met Ala275 280 285Tyr Asp Tyr Tyr Tyr Thr Leu Asp Lys Tyr Tyr
Ser His Gly Gly Gly290 295 300Ser Ala Phe Gly Pro Ser Arg Gly Val
Gly Phe Val Asn Glu Leu Ile305 310 315 320Ala Arg Met Thr Gly Asn
Leu Pro Val Lys Asp His Thr Thr Val Asn325 330 335His Thr Leu Asp
Asp Asn Pro Glu Thr Phe Pro Leu Asp Ala Val Leu340 345 350Tyr Ala
Asp Phe Ser His Asp Asn Thr Met Thr Gly Ile Phe Ser Ala355 360
365Met Gly Leu Tyr Asn Gly Thr Lys Pro Leu Ser Thr Ser Lys Ile
Gln370 375 380Pro Pro Thr Gly Ala Ala Ala Asp Gly Tyr Ala Ala Ser
Trp Thr Val385 390 395 400Pro Phe Ala Ala Arg Ala Tyr Val Glu Leu
Leu Arg Cys Glu Thr Glu405 410 415Thr Ser Ser Glu Glu Glu Glu Glu
Gly Glu Asp Glu Pro Phe Val Arg420 425 430Val Leu Val Asn Asp Arg
Val Val Pro Leu His Gly Cys Arg Val Asp435 440 445Arg Trp Gly Arg
Cys Arg Arg Asp Glu Trp Ile Lys Gly Leu Thr Phe450 455 460Ala Arg
Gln Gly Gly His Trp Asp Arg Cys Phe465 470
47515487PRTMyceliophthora thermophila 15Met Thr Gly Leu Gly Val Met
Val Val Met Val Gly Phe Leu Ala Ile1 5 10 15Ala Ser Leu Gln Ser Glu
Ser Arg Pro Cys Asp Thr Pro Asp Leu Gly20 25 30Phe Gln Cys Gly Thr
Ala Ile Ser His Phe Trp Gly Gln Tyr Ser Pro35 40 45Tyr Phe Ser Val
Pro Ser Glu Leu Asp Ala Ser Ile Pro Asp Asp Cys50 55 60Glu Val Thr
Phe Ala Gln Val Leu Ser Arg His Gly Ala Arg Ala Pro65 70 75 80Thr
Leu Lys Arg Ala Ala Ser Tyr Val Asp Leu Ile Asp Arg Ile His85 90
95His Gly Ala Ile Ser Tyr Gly Pro Gly Tyr Glu Phe Leu Arg Thr
Tyr100 105 110Asp Tyr Thr Leu Gly Ala Asp Glu Leu Thr Arg Thr Gly
Gln Gln Gln115 120 125Met Val Asn Ser Gly Ile Lys Phe Tyr Arg Arg
Tyr Arg Ala Leu Ala130 135 140Arg Lys Ser Ile Pro Phe Val Arg Thr
Ala Gly Gln Asp Arg Val Val145 150 155 160His Ser Ala Glu Asn Phe
Thr Gln Gly Phe His Ser Ala Leu Leu Ala165 170 175Asp Arg Gly Ser
Thr Val Arg Pro Thr Leu Pro Tyr Asp Met Val Val180 185 190Ile Pro
Glu Thr Ala Gly Ala Asn Asn Thr Leu His Asn Asp Leu Cys195 200
205Thr Ala Phe Glu Glu Gly Pro Tyr Ser Thr Ile Gly Asp Asp Ala
Gln210 215 220Asp Thr Tyr Leu Ser Thr Phe Ala Gly Pro Ile Thr Ala
Arg Val Asn225 230 235 240Ala Asn Leu Pro Gly Ala Asn Leu Thr Asp
Ala Asp Thr Val Ala Leu245 250 255Met Asp Leu Cys Pro Phe Glu Thr
Val Ala Ser Ser Ser Ser Asp Pro260 265 270Ala Thr Ala Asp Ala Gly
Gly Gly Asn Gly Arg Pro Leu Ser Pro Phe275 280 285Cys Arg Leu Phe
Ser Glu Ser Glu Trp Arg Ala Tyr Asp Tyr Leu Gln290 295 300Ser Val
Gly Lys Trp Tyr Gly Tyr Gly Pro Gly Asn Pro Leu Gly Pro305 310 315
320Thr Gln Gly Val Gly Phe Val Asn Glu Leu Leu Ala Arg Leu Ala
Gly325 330 335Val Pro Val Arg Asp Gly Thr Ser Thr Asn Arg Thr Leu
Asp Gly Asp340 345 350Pro Arg Thr Phe Pro Leu Gly Arg Pro Leu Tyr
Ala Asp Phe Ser His355 360 365Asp Asn Asp Met Met Gly Val Leu Gly
Ala Leu Gly Ala Tyr Asp Gly370 375 380Val Pro Pro Leu Asp Lys Thr
Ala Arg Arg Asp Pro Glu Glu Leu Gly385 390 395 400Gly Tyr Ala Ala
Ser Trp Ala Val Pro Phe Ala Ala Arg Ile Tyr Val405 410 415Glu Lys
Met Arg Cys Ser Gly Gly Gly Gly Gly Gly Gly Gly Gly Glu420 425
430Gly Arg Gln Glu Lys Asp Glu Glu Met Val Arg Val Leu Val Asn
Asp435 440 445Arg Val Met Thr Leu Lys Gly Cys Gly Ala Asp Glu Arg
Gly Met Cys450 455 460Thr Leu Glu Arg Phe Ile Glu Ser Met Ala Phe
Ala Arg Gly Asn Gly465 470 475 480Lys Trp Asp Leu Cys Phe
Ala485
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