Redirected Cells With Mhc Chimeric Receptors And Methods Of Use In Immunotherapy

Abstract

Chimeric receptors featuring major histocompatibility molecules grafted onto T cell receptor molecules and surrogate co-receptors featuring cell surface receptor ligands fused with signaling molecule domains. The chimeric receptors can be used to redirect cells, altering their specificity. T cells expressing chimeric receptors may bind to TCRs of target T cells for which their chimeric receptors are specific. Surrogate co-receptors may be used to help enhance TCR-CD3 signaling as part of this modular receptor system. The chimeric receptors and surrogate coreceptors may be used to help eliminate autoreactive T cells or program T cells to desired effector functions.

Description

CROSS REFERENCE

[0001] This application is a Divisional and claims benefit of U.S. patent application Ser. No. 15/738,467 filed Dec. 20, 2017 which is a 371 application and claims benefit of International Patent Application No. PCT/US16/40177 filed Jun. 29, 2016, which claims benefit of U.S. Provisional Patent Application No. 62/186,865 filed Jun. 30, 2015, the specification(s) of which is/are incorporated herein in their entirety by reference.

REFERENCE TO SEQUENCE LISTING

[0003] Applicant asserts that the paper copy of the Sequence Listing is identical to the Sequence Listing in computer readable form found on the accompanying computer file, entitled UNIA_15_04_PCT_US_DIV_Sequence_Listing_ST25, and is identical to that forming part of the international application as filed. The content of the sequence listing is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

[0004] The present invention relates to T cells and T cell receptors, more particularly to redirected T cells with engineered receptors, more particularly to redirected cells expressing a chimeric receptor comprising a major histocompatibility complex (MHC) molecule, including redirected cells further comprising a surrogate coreceptor, e.g., as components of a modular chimeric receptor system.

BACKGROUND OF THE INVENTION

[0005] T cells normally recognize and respond to peptide antigens embedded within major histocompatibility complex molecules (pMHCs) of antigen presenting cells (APCs) via their TCR-CD3 complex (see FIG. 1A). This eight-subunit TCR-CD3 complex is composed of the TCR, which is the receptor module that binds the pMHC, and the CD3.gamma..epsilon., CD3.delta..epsilon., and CD3.zeta..zeta. signaling modules that connect the TCR to the intracellular signaling machinery (see FIG. 1B). The intracellular domains of the CD3 subunits contain immunoreceptor tyrosine-based activation motifs (ITAMs) that are phosphorylated by the Src kinases, e.g., Lck, Fyn. CD3.gamma., CD3.delta., and CD3.epsilon. each contain one ITAM while CD3.zeta. contains three ITAMs for a total of ten in a single complex. The TCR-CD3 complex does not appear to have any intrinsic Src kinase activity. In fact, coreceptors (e.g., CD4, CD8) appear to sequester Lck away from the TCR-CD3 complex until both a coreceptor and a TCR bind a pMHC. The Lck associated with the coreceptor is then brought into close proximity to the CD3 ITAMs to phosphorylate tyrosines within these motifs and initiate signaling.

[0006] Ectopic T cell receptors (TCRs) have been introduced into T cells in an effort to reprogram or alter T cell specificity. However, in some cases, the introduction of ectopic TCRs has been found to lead to cross-pairing events with endogenous TCRs, resulting in novel TCRs with autoimmune specificities. This lead to the use of chimeric antigen receptors (CARs), which are typically designed with (a) an extracellular domain consisting of a single-chain variable fragment (scFv) of a monoclonal antibody directed against a target antigen; (b) a transmembrane domain that does not mediate interactions with other protein subunits; and (c) an intracellular domain consisting of the CD3.zeta. intracellular signaling domain as well as signaling domains from a variety of other signaling molecules (e.g., CD28, CD27, ICOS, 4-1BB, OX40). Without wishing to limit the present invention to any theory or mechanism, it is believed that CARs do not sufficiently take advantage of the modularity of the existing signaling apparatus, which is optimized to direct T cell activation and effector functions. CARs are likely to be delivering incomplete signals that could have unintended consequences or side effects.

[0007] The present invention features novel chimeric receptors (e.g., "MHCRs") comprising a portion of a MHC molecule (e.g., class I, class II, non-classical MHC) and a portion of the TCR. In some embodiments, the MHCR comprises a portion of an antigen peptide. The present invention also features cells, such as T cells, expressing said MHCRs (cells expressing a MHCR are herein referred to as "redirected cells"). The MHCRs are adapted to recognize and bind to appropriate (specific) TCRs. Redirected cells (e.g., redirected T cells) expressing a MHCR would mimic antigen presenting cells (APCs), the cells that normally express MHC molecules. In some cases, binding of a TCR of a target T cell to the MHCR of the redirected cell may then result in destruction of the target T cell; thus, in this case, the redirected cells may function as "anti-T cell" T cells. The present invention is not limited to redirected cells functioning to destroy a target. For example, in some embodiments, the redirected cell is adapted to help reprogram a target cell, e.g., the redirected cell may deliver instructions to the target cell.

[0008] The present invention also features engineered cells expressing both an MHCR and an SCR. It was surprisingly discovered that engineered cells co-expressing an MHCR and an SCR had enhanced effects (e.g., increased IL-2 expression, see FIG. 5) as compared to engineered cells expressing a MHCR without co-expression of an SCR. Without wishing to limit the present invention to any theory or mechanism, it is believed that the use of an SCR in combination with a MHCR enhances signaling and/or other downstream effects. Without wishing to limit the present invention to any theory or mechanism, it is believed that the combination of the MHCR and SCR may provide a synergistic effect, e.g., effects of the combination of the MHCR and SCR may provide effects greater than those of the MHCR and SCR individually.

[0009] Any feature or combination of features described herein are included within the scope of the present invention provided that the features included in any such combination are not mutually inconsistent as will be apparent from the context, this specification, and the knowledge of one of ordinary skill in the art. Additional advantages and aspects of the present invention are apparent in the following detailed description and claims.

SUMMARY OF THE INVENTION

[0010] The present invention features novel chimeric receptors for engineering redirected cells. For example, the present invention features an engineered cell co-expressing on its surface a chimeric receptor (MHCR) comprising a major histocompatibility complex (MHC) portion (derived from a MHC protein) directly or indirectly fused to a T cell receptor (TCR) portion (derived from a TCR protein); and a surrogate co-receptor (SCR) comprising a cell surface receptor ligand portion directly or indirectly fused to a signaling molecule portion. In some embodiments, the MHCR is adapted to bind to a TCR of a target cell and the SCR is adapted to bind to a cell surface receptor of the target cell. In some embodiments, binding of the MHCR to the TCR of the target cell and binding of the SCR to the cell surface receptor of the target cell (i) initiates a signaling cascade effective for eliminating the target cell or (ii) instructs the target cell to differentiate to a specific effector function. In some embodiments, the cell (e.g., genetically engineered cell) is a T cell (e.g., CD4+, CD8+); however, the present invention is not limited to T cells.

[0011] In some embodiments, the TCR portion comprises a transmembrane domain of the TCR protein and the MHC portion comprises an extracellular domain of the MHC protein. In some embodiments, the TCR portion comprises at least a portion of a transmembrane domain of the TCR protein and the MHC portion comprises at least a portion of an extracellular domain of the MHC protein. In some embodiments, the TCR portion comprises at least a portion of a transmembrane domain and at least a portion of a cytoplasmic domain of a TCR protein, and the MHC portion comprises at least a portion of an extracellular domain of the MHC protein.

[0012] In some embodiments, the MHC portion of the MHCR is N-terminal to the TCR portion of the MHCR. In some embodiments, the MHC portion is directly fused to the TCR portion. In some embodiments, the MHC portion is indirectly fused to the TCR portion via a linker. In some embodiments, the MHCR further comprises a peptide antigen integrated into the MHC portion, or directly or indirectly fused to the MHC portion. In some embodiments, the peptide antigen is linked to the MHC portion via a linker. In some embodiments, the linker comprises a glycine-rich peptide. In some embodiments, the SCR further comprises a transmembrane domain positioned in between the cell surface receptor ligand portion and the signaling molecule portion. In some embodiments, the MHC protein, the TCR protein, or both the MHC protein and the TCR protein are mammalian proteins (e.g., human, mouse, cat, dog, etc. In some embodiments, the signaling molecule portion has kinase or phosphatase activity. In some embodiments, the signaling molecule portion comprises a Src kinase.

[0013] In some embodiments, the MHC protein comprises HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB, H2-Aa, H2-B1, H2-K1, H2-EB beta, H2-EK alpha, H2-EK beta, a fragment thereof, or a combination thereof. In some embodiments, the MHC molecule comprises HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB, H2-Aa, H2-B1, H2-K1, H2-EB beta, H2-EK alpha, H2-EK beta, a peptide that is at least 90% identical to HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB, H2-Aa, H2-B1, H2-K1, H2-EB beta, H2-EK alpha, or H2-EK beta, a fragment thereof, or a combination thereof. In some embodiments, the TCR molecule comprises TRAC, TRBC1, TRBC2, TRDC, TRGC1, TRGC2, TCRA, TCB1, TCB2, TCC1, TCC2, TCC3, TCC4, a fragment thereof, or a combination thereof. In some embodiments, the TCR molecule comprises TRAC, TRBC1, TRBC2, TRDC, TRGC1, TRGC2, TCRA, TCB1, TCB2, TCC1, TCC2, TCC3, TCC4, a peptide that is at least 90% identical to TRAC, TRBC1, TRBC2, TRDC, TRGC1, TRGC2, TCRA, TCB1, TCB2, TCC1, TCC2, TCC3, or TCC4, a fragment thereof, or a combination thereof. In some embodiments, the cell surface receptor ligand portion of the SCR comprises a CD28 ligand, a CTLA-4 ligand, an ICOS ligand, an OX40 ligand, a PD-1 ligand, or a CD2 ligand. In some embodiments, the CD28 ligand comprises CD80, CD86, or both CD80 and CD86. In some embodiments, the MHCR is adapted to complex with a CD3 subunit. In some embodiments, the engineered cell further co-expresses a second SCR.

[0014] The present invention also features a chimeric receptor (MHCR) as described above. For example, the MHCR may comprise a major histocompatibility complex (MHC) portion derived from a MHC protein directly or indirectly fused to a T cell receptor (TCR) portion derived from a TCR protein, wherein the MHCR is adapted to bind to a TCR of a target cell.

[0015] The present invention also features a method of eliminating a target cell or reprogramming a target cell (the target cell comprising a TCR). In some embodiments, the method comprises introducing a genetically engineered cell that expresses on its surface a chimeric receptor (MHCR) according to the present invention to the target cell, wherein the MHCR is specific for the TCR of the target cell, wherein upon binding of the MHCR to the TCR the genetically engineered cell (a) initiates a signaling cascade that eliminates the target cell, or (b) instructs the target cell to differentiate to a specific effector function. In some embodiments, the method is for immunotherapy. In some embodiments, the target cell is an autoreactive T cell.

[0016] The present invention also features vectors encoding MHCRs of the present invention. The present invention also features vectors encoding SCRs of the present invention.

[0017] Then present invention also features an engineered cell co-expressing on its surface a chimeric receptor (MHCR) comprising a major histocompatibility complex (MHC) portion derived from an extracellular domain of a mammalian MHC protein directly or indirectly linked to a transmembrane domain of a T cell receptor (TCR) portion derived from a mammalian TCR protein, wherein the MHC portion is N-terminal to the TCR portion; and a surrogate coreceptor (SCR) comprising a cell surface receptor ligand portion indirectly linked to a signaling molecule portion by a transmembrane domain, wherein the signaling molecule portion has kinase or phosphatase activity. The MHCR may be adapted to bind to a TCR of a target cell and the SCR may be adapted to bind to a cell surface receptor of the target cell.

[0018] The present invention also features an engineered T-cell co-expressing on its surface: a chimeric receptor (MHCR) comprising a major histocompatibility complex (MHC) portion derived from an extracellular domain of a mammalian MHC protein directly or indirectly linked to a transmembrane domain of a T cell receptor (TCR) portion derived from a mammalian TCR protein, the MHC portion being N-terminal to the TCR portion, the MHC portion being selected from HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB, H2-Aa, H2-B1, H2-K1, H2-EB beta, H2-EK alpha, and H2-EK beta, the TCR portion being selected from TRAC, TRBC1, TRBC2, TRDC, TRGC1, TRGC2, TCRA, TCB1, TCB2, TCC1, TCC2, TCC3, TCC4; and a surrogate coreceptor (SCR) comprising a cell surface receptor ligand portion indirectly linked to a signaling molecule portion by a transmembrane domain, the signaling molecule portion having kinase or phosphatase activity. The MHCR may be adapted to bind to a TCR of a target cell and the SCR may be adapted to bind to a cell surface receptor of the target cell.

[0019] In some embodiments, the MHC molecule comprises at least a portion of an extracellular domain of a MHC protein. In some embodiments, the TCR molecule comprises at least a portion of a cytoplasmic domain of a TCR protein, at least a portion of a transmembrane domain of a TCR protein, at least a portion of an extracellular domain of a TCR protein, or a combination thereof. In some embodiments, the chimeric receptor is adapted to bind to a TCR. In some embodiments, the chimeric receptor is adapted to complex with at least one CD3 subunit.

[0020] The present invention also features a surrogate co-receptor (SCR) comprising a cell surface receptor ligand portion directly or indirectly fused to a signaling molecule portion via a transmembrane domain, wherein the SCR is adapted to bind to a cell surface receptor of a target cell. In some embodiments, the cell surface receptor ligand portion is indirectly fused to the signaling molecule portion via a linker.

[0021] The present invention also features genetically engineered cells (e.g., redirected cells) that express on their surfaces a chimeric receptor according to the present invention. In some embodiments, the cell is a T cell (e.g., CD8+ T cell, CD4+ T cell, etc.). In some embodiments, the cell co-expresses one or more SCRs according to the present invention. In some embodiments, the chimeric receptor is complexed with at least one CD3 subunit.

[0022] The present invention also features a method of eliminating a target cell or reprogramming a target cell (said target cell comprising a TCR). In some embodiments, the method comprises introducing a genetically engineered cell that expresses on its surface a chimeric receptor to the target cell, wherein the chimeric receptor is specific for the TCR of the target cell. In some embodiments, binding of the chimeric receptor on the genetically engineered cell to the TCR of the target cell initiates a signaling cascade that eliminates the target cell. In some embodiments, binding of the chimeric receptor of the genetically engineered cell to the TCR of the target cell instructs the target cell to differentiate to a specific effector function (e.g. Th1, Th2, Th17, Tfh, Treg or cytotoxic T cell). In some embodiments, the chimeric receptor (e.g., MHCR) is expressed on a Treg and binding of the chimeric receptor to the TCR of a target cell inhibits the target cell's function (e.g., redirect the Treg function against an autoimmune cell). In some embodiments, the genetically engineered cell co-expresses a SCR. In some embodiments, the SCR comprises a cell surface receptor ligand specific for a cell surface receptor on the target cell. In some embodiments, binding of the chimeric receptor to the TCR and binding of the cell surface receptor ligand of the SCR to the cell surface receptor of the target cell initiates a signaling cascade that eliminates the target cell, or instructs the target cell to differentiate to a specific effector function.

[0023] In some embodiments, the method is for immunotherapy. In some embodiments, the genetically engineered cell is surgically introduced to a host (e.g., a mammal). In some embodiments, the target cell is an autoreactive T cell.

[0024] The present invention also features nucleotide sequences encoding the chimeric receptors of the present invention. The present invention also features vectors encoding the chimeric receptors of the present invention. The present invention also features nucleotide sequences encoding the SCRs of the present invention. The present invention also features vectors encoding the SCRs of the present invention.

[0025] Any feature or combination of features described herein are included within the scope of the present invention provided that the features included in any such combination are not mutually inconsistent as will be apparent from the context, this specification, and the knowledge of one of ordinary skill in the art. Additional advantages and aspects of the present invention are apparent in the following detailed description and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The patent application or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

[0027] The features and advantages of the present invention will become apparent from a consideration of the following detailed description presented in connection with the accompanying drawings in which:

[0028] FIG. 1A shows molecules involved in T cell activation. Engagement of the TCR with pMHC (MHC with a peptide antigen) initiates T cell activation.

[0029] FIG. 1B shows the molecular components of the lpha-beta-TCR-CD3 complex. The TCR transfers pMHC-specific information to the CD3 subunits and inside the T cell. Triangles represent the inner and outer leafs of the cell membrane. Red and blue dots and ovals represent the transmembrane charge interactions that drive subunit assembly of the complexes (from Kuhns et al., 2006, Immunity 24:133-139).

[0030] FIG. 2A shows a redirected T cell expressing a MHCR (pMHCR with peptide antigen) of the present invention. The MHCR in complex with CD3 subunits is bound to a target T cell's TCR.

[0031] FIG. 2B shows non-limiting examples of MHCR configurations (and the schematics are not limiting with respect to N-terminal and C-terminal orientation). TCR refers to the T cell receptor portion; MHC refers to the major histocompatibility portion, antigen refers to the antigen portion, and L refers to a linker. The present invention is not limited to these configurations. For example, in some embodiments the antigen portion is integrated into the MHC portion. In some embodiments, the MHC portion is N-terminal to the TCR portion (see orientation of sequences below).

[0032] FIG. 3A is a schematic view of a chimeric surrogate coreceptor (SCR), e.g., one comprising CD80/CD86-Lck.

[0033] FIG. 3B shows a redirected T cell expressing a MHCR (pMHCR) and two surrogate coreceptors (SCRs). The MHCR, bound to a target T cell's TCR, is complexed with CD3. The SCRs are bound to the target T cell's coreceptors (CD28, CTLA-4). Binding of the SCRs to coreceptors on the target T cell may help initiate CD3 signaling similar to that seen in normal T cell activation.

[0034] FIG. 4 shows expression of pMHCR-CD3 complexes on T cell hybridomas. 58.alpha..sup.-.beta..sup.- cells that lack endogenous TCRs were transduced with a pMHCR composed of MCC:I-E.sup.k. The proportional expression (diagonal) of I-E.sup.k and CD3 subunits suggests surface co-dependent expression of the epitopes.

[0035] FIG. 5 shows TCR-specific IL-2 production by pMHCR-CD3 expressing T cell hybridomas. 58.alpha..sup.-.beta..sup.- cells that lack endogenous TCRs were transduced with a pMHCR composed of MCC:I-E.sup.k as well as a CD80-Lck surrogate coreceptor (SCR). The cells were co-cultured with parental M12 B cells, or M12 cells stably transduced to express the MCC:I-E.sup.k-specific 2B4 TCR alone or with CD28. The increased IL-2 expression in the presence of CD28 indicates that the surrogate coreceptor (SCR) enhances pMHCR-CD3 signaling.

[0036] FIG. 6 shows TCR-specific killing of CD4 T cells by redirected CTLs. Purified CD8 T cells from B10.A mice were activated in vitro and transduced with a MCC:I-E.sup.k pMHCR (agonist) or an HB:I-E.sup.k pMHCR (null) as well as a CD80-Lck surrogate coreceptor. The redirected CTLs were then co-cultured at the indicated ratios with naive ex vivo 5c.c7 TCR transgenic CD4 T cells overnight. Killing was evaluated by flow cytometry using count beads relative to the 0:1 samples.

DETAILED DESCRIPTION OF THE INVENTION

[0037] Chimeric MHC Receptors (MHCRs)

[0038] The present invention features chimeric receptors (e.g., "MHCRs") comprising at least a MHC portion (e.g., class I, class II, non-classical, a combination thereof, etc.) and a TCR portion (e.g., .alpha..beta., .gamma..delta. TCR, etc.) (see FIG. 2B(i)). For example, the MHCR may comprise a MHC portion and a TCR portion, a MHC and a TCR portion optionally separated by a linker (see FIG. 2B (iii) and (iv)). A linker may be any appropriate linker such as but not limited to a peptide linker. In some embodiments, the MHCR further comprises a peptide antigen (see FIG. 2B (ii)); a MHCR comprising a peptide antigen may herein be referred to as a "pMHCR". Note that MHC portions and/or TCR portions may be from any appropriate species including but not limited to human, monkey, mouse, rat, rabbit, or the like, e.g., any other appropriate mammalian species. The components and configurations of the MHRCs of the present invention are not limited to those shown in FIG. 2B. For example, the MHCR may comprise a TCR portion and a MHC portion; a TCR portion and a MHC portion separated by a linker; a TCR portion and a MHC portion and an antigen portion; a TCR portion and a MHC portion and an antigen portion, wherein the TCR portion and MHC portion are separated by a linker; a TCR portion and a MHC portion and an antigen portion, wherein the MHC portion and antigen portion are separated by a linker; a TCR portion and a MHC portion and an antigen portion, wherein the TCR and MHC portion are separated by a linker and the MHC portion and the antigen portion are separate by a linker; etc.

[0039] The MHC portion may comprise one or more MHC proteins (e.g., HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB1), one or more fragments thereof, or combinations thereof. For reference, non-limiting MHC sequences (human, mouse) are listed below in Table 1.1 and Table 1.2. Note that MHC genes are highly polymorphic, and thus the present invention is not limited to the sequences in Table 1.1 And Table 1.2. The present invention includes MHC polymorphisms and any other appropriate variant of MHC proteins.

TABLE-US-00001 TABLE 1.1 Examples of Human MHC Protein Sequences SEQ ID NO. Description Amino Acid Sequence 1 Uniprot P01891 MAVMAPRTLV LLLSGALALT QTWAGSHSMR HLA-A gene YFYTSVSRPG RGEPRFIAVG YVDDTQFVRF (MHC I) DSDAASQRME PRAPWIEQEG PEYWDRNTRN VKAQSQTDRV DLGTLRGYYN QSEAGSHTIQ MMYGCDVGSD GRFLRGYRQD AYDGKDYIAL KEDLRSWTAA DMAAQTTKHK WEAAHVAEQW RAYLEGTCVE WLRRYLENGK ETLQRTDAPK THMTHHAVSD HEATLRCWAL SFYPAEITLT WQRDGEDQTQ DTELVETRPA GDGTFQKWVA VVVPSGQEQR YTCHVQHEGL PKPLTLRWEP SSQPTIPIVG IIAGLVLFGA VITGAVVAAV MWRRKSSDRK GGSYSQAASS DSAQGSDVSL TACKV 2 Uniprot P18464 MRVTAPRTVL LLLWGAVALT ETWAGSHSMR HLA-B gene YFYTAMSRPG RGEPRFIAVG YVDDTQFVRF (MHC I) DSDAASPRTE PRAPWIEQEG PEYWDRNTQI FKTNTQTYRE NLRIALRYYN QSEAGSHTWQ TMYGCDVGPD GRLLRGHNQY AYDGKDYIAL NEDLSSWTAA DTAAQITQRK WEAAREAEQL RAYLEGLCVE WLRRHLENGK ETLQRADPPK THVTHHPVSD HEATLRCWAL GFYPAEITLT WQRDGEDQTQ DTELVETRPA GDRTFQKWAA VVVPSGEEQR YTCHVQHEGL PKPLTLRWEP SSQSTIPIVG IVAGLAVLAV VVIGAVVATV MCRRKSSGGK GGSYSQAASS DSAQGSDVSL TA 3 Uniprot Q29963 MRVMAPRTLI LLLSGALALT ETWACSHSMR HLA-C gene YFDTAVSRPG RGEPRFISVG YVDDTQFVRF (MHC I) DSDAASPRGE PRAPWVEQEG PEYWDRETQK YKRQAQADRV NLRKLRGYYN QSEDGSHTLQ WMYGCDLGPD GRLLRGYDQS AYDGKDYIAL NEDLRSWTAA DTAAQITQRK WEAAREAEQW RAYLEGTCVE WLRRYLENGK ETLQRAEHPK THVTHHPVSD HEATLRCWAL GFYPAEITLT WQRDGEDQTQ DTELVETRPA GDGTFQKWAA VVVPSGEEQR YTCHVQHEGL PEPLTLRWEP SSQPTIPIVG IVAGLAVLAV LAVLGAVMAV VMCRRKSSGG KGGSCSQAAS SNSAQGSDES LIACKA 4 Uniprot P20036 MRPEDRMFHI RAVILRALSL AFLLSLRGAG HLA DPA1 AIKADHVSTY AAFVQTHRPT GEFMFEFDED (MHC II) EMFYVDLDKK ETVWHLEEFG QAFSFEAQGG LANIAILNNN LNTLIQRSNH TQATNDPPEV TVFPKEPVEL GQPNTLICHI DKFFPPVLNV TWLCNGELVT EGVAESLFLP RTDYSFHKFH YLTFVPSAED FYDCRVEHWG LDQPLLKHWE AQEPIQMPET TETVLCALGL VLGLVGIIVG TVLIIKSLRS GHDPRAQGTL 5 Uniprot P04440 MMVLQVSAAP RTVALTALLM VLLTSVVQGR HLA DPB1 ATPENYLFQG RQECYAFNGT QRFLERYIYN (MHC II) REEFARFDSD VGEFRAVTEL GRPAAEYWNS QKDILEEKRA VPDRMCRHNY ELGGPMTLQR RVQPRVNVSP SKKGPLQHHN LLVCHVTDFY PGSIQVRWFL NGQEETAGVV STNLIRNGDW TFQILVMLEM TPQQGDVYTC QVEHTSLDSP VTVEWKAQSD SARSKTLTGA GGFVLGLIIC GVGIFMHRRS KKVQRGSA 6 Uniprot P01909 MILNKALMLG ALALTTVMSP CGGEDIVADH HLA DQA1 VASYGVNLYQ SYGPSGQYTH EFDGDEQFYV (MHC II) DLGRKETVWC LPVLRQFRFD PQFALTNIAV LKHNLNSLIK RSNSTAATNE VPEVTVFSKS PVTLGQPNIL ICLVDNIFPP VVNITWLSNG HSVTEGVSET SFLSKSDHSF FKISYLTLLP SAEESYDCKV EHWGLDKPLL KHWEPEIPAP MSELTETVVC ALGLSVGLVG IVVGTVFIIR GLRSVGASRH QGPL 7 Uniprot P01920 MSWKKALRIP GGLRAATVTL MLAMLSTPVA HLA DQB1 EGRDSPEDFV YQFKAMCYFT NGTERVRYVT (MHC II) RYIYNREEYA RFDSDVEVYR AVTPLGPPDA EYWNSQKEVL ERTRAELDTV CRHNYQLELR TTLQRRVEPT VTISPSRTEA LNHHNLLVCS VTDFYPAQIK VRWFRNDQEE TTGVVSTPLI RNGDWTFQIL VMLEMTPQHG DVYTCHVEHP SLQNPITVEW RAQSESAQSK MLSGIGGFVL GLIFLGLGLI IHHRSQKGLL H 8 Uniprot P01903 MAISGVPVLG FFIIAVLMSA QESWAIKEEH VIIQAEFYLN HLA DRA gene PDQSGEFMFD FDGDEIFHVD MAKKETVWRL (MHC II) EEFGRFASFE AQGALANIAV DKANLEIMTK RSNYTPITNV PPEVTVLTNS PVELREPNVL ICFIDKFTPP VVNVTWLRNG KPVTTGVSET VFLPREDHLF RKFHYLPFLP STEDVYDCRV EHWGLDEPLL KHWEFDAPSP LPETTENVVC ALGLTVGLVG IIIGTIFIIK GVRKSNAAER RGPL 9 Uniprot Q30167 MVCLRLPGGS CMAVLTVTLM VLSSPLALAG HLA DRB1 gene DTRPRFLEEV KFECHFFNGT ERVRLLERRV (MHC II) HNQEEYARYD SDVGEYRAVT ELGRPDAEYW NSQKDLLERR RAAVDTYCRH NYGVGESFTV QRRVQPKVTV YPSKTQPLQH HNLLVCSVNG FYPGSIEVRW FRNGQEEKTG VVSTGLIQNG DWTFQTLVML ETVPQSGEVY TCQVEHPSVM SPLTVEWRAR SESAQSKMLS GVGGFVLGLL FLGAGLFIYF RNQKGHSGLP PTGFLS

TABLE-US-00002 TABLE 1.2 Examples of Mouse MHC Protein Sequences SEQ ID NO. Description Amino Acid Sequence 10 Uniprot Q9TQ72 RSRALILGVL ALTTMLSLCG GEDYIEADHV MHC II antigen IE AFYGISVYQS PGDIGQYTFE FDGDELFYVD alpha (H2-Aa) LDKKETVWML PEFGQLTSFD PQGGLQEIAT GKYNLEILIK DSNFTPAANE APQATVFPKS PVLLGQPNTL ICFVDNIFPP VINITWLRNS KSVTDGVYET SFLVNRDHSF HKLSYLTFIP SDDDIYDCKV EHWGLEEPVL KHWEPEIPAP MSELTETVIC ALGLSVGLVG IVVGTIFIIQ GLRSGGTSRH 11 Uniprot O19440 MAQRTLFLLL AAALTMIETR AGPHSMRYFE MHC I antigen TAVFRPGLGE PRFISVGYVD NTQFVSFDSD (H2-B1) AENPRSEPRA PWMEQEGPEY WERETQIAKD NEQSFGWSLR NLIHYYNQSK GGFHTFQRLS GCDMGLDGRL LRGYLQFAYD GRDYITLNED LKTWMAADLV ALITRRKWEQ AGAAELYKFY LEGECVEWLR RYLELGNETL LRTDPPKAHV THHPRPAGDV TLRCWALGFY PADITLTWQL NGEELTQDME LVETRPAGDG TFQKWAAVVV PLGKEQNYTC HVYHEGLPEP LTLRWEPPPS TGSNMVNIAV LVVLGAVIII EAMVAFVLKS SRKIAILPGP AGTKGSSAS 12 Uniprot Q31191 MAPCTLLLLL AAALAPTQTR AARAAARGPV MHC I H2-K gene RRSGSHRAPP PGPHSLSDAD NPRFEPRAPW (Haplotype d) MEQEGPEYWE EQTQRAKSDE QWFRVSLRTA (H2-K1) QRYYNQSKGG SHTFQRMFGC DVGSDWRLLR GYQQFAYDGR DYIALNEDLK TWTAADTAAL ITRRKWEQAG DAEYYRAYLE GECVEWLRRY LELGNETLLR TDSPKAHVTY HPRSQVDVTL RCWALGFYPA DITLTWQLNG EDLTQDMELV ETRPAGDGTF QKWAAVVVPL GKEQNYTCHV HHKGLPEPLT LRWKLPPPTV SNTVIIAVLV VLGAAIVTGA VVAFVMKMRR NTGGKGVNYA LAPGSQTSDL SLPDGKVMVH 13 Uniprot P04230 MVWLPRVPCV AAVILLLTVL SPPMALVRDS H2 Class II RPWFLEYCKS ECHFYNGTQR VRLLERYFYN histocompatibility LEENLRFDSD VGEFHAVTEL GRPDAENWNS antigen E-B beta QPEFLEQKRA EVDTVCRHNY EISDKFLVRR chain RVEPTVTVYP TKTQPLEHHN LLVCSVSDFY PGNIEVRWFR NGKEEKTGIV STGLVRNGDW TFQTLVMLET VPQSGEVYTC QVEHPSLTDP VTVEWKAQST SAQNKMLSGV GGFVLGLLFL GAGLFIYFRN QKGQSGLQPT GLLS 14 Uniprot P04224 MATIGALVLR FFFIAVLMSS QKSWAIKEEH MHC II E-K alpha TIIQAEFYLL PDKRGEFMFD FDGDEIFHVD chain IEKSETIWRL EEFAKFASFE AQGALANIAV (underlined portion is DKANLDVMKE RSNNTPDANV APEVTVLSRS portion used in SEQ PVNLGEPNIL ICFIDKFSPP VVNVTWLRNG ID NO: 30) RPVTEGVSET VFLPRDDHLF RKFHYLTFLP STDDFYDCEV DHWGLEEPLR KHWEFEEKTL LPETKENVVC ALGLFVGLVG IVVGIILIMK GIKKRNVVER RQGAL 15 GenBank ID: MWLPRVPCVAAVILLLTVLSPPVALVRDSRPWFLEY M36939.1 CKSECHFYNGTQRVRLLVRYFYNLEENLRFDSDV MHC II E-K beta GEFRAVTELGRPDAENWNSQPEFLEQKRAEVD chain TVCRHNYEIFDNFLVPRRVEPTVWYPTKTQPLEH (underlined portion is HNLLVCSVSDFYPGNIEVRWFRNGKEEKTGIVSTG used in SEQ ID NO: LVRNGDVVTFQTLVMLETVPQSGEVYTCQVEHPSL 31, 32) TDPVTVEWKAQSTSAQNKMLSGVGGFVLGLLFLG AGLFIYFRNQKGQSGLQPTGLLS

[0040] Referring to Table 1.1, the HLA-A (MHC 1) sequence (SEQ ID NO: 1) includes the signal peptide (amino acids 1-24); amino acids 25-308 are believed to make up the extracellular region, amino acids 309-332 are believed to make up the transmembrane region, and amino acids 333-365 are believed to make up the cytoplasmic region. The HLA-B (MHC 1) sequence (SEQ ID NO: 2) includes the signal peptide (amino acids 1-24); amino acids 25-308 are believed to make up the extracellular region, amino acids 309-332 are believed to make up the transmembrane region, and amino acids 333-362 are believed to make up the cytoplasmic region. The HLA-C(MHC 1) sequence (SEQ ID NO: 3) includes the signal peptide (amino acids 1-24); amino acids 25-308 are believed to make up the extracellular region, amino acids 309-333 are believed to make up the transmembrane region, and amino acids 334-366 are believed to make up the cytoplasmic region. The HLA DPA1 (MHC II) sequence (SEQ ID NO: 4) includes the signal peptide (amino acids 1-28); amino acids 29-222 are believed to make up the extracellular region, amino acids 223-245 are believed to make up the transmembrane region, and amino acids 246-260 are believed to make up the cytoplasmic region. The HLA DPB1 (MHC II) sequence (SEQ ID NO: 5) includes the signal peptide (amino acids 1-29); amino acids 30-225 are believed to make up the extracellular region, amino acids 226-246 are believed to make up the transmembrane region, and amino acids 247-258 are believed to make up the cytoplasmic region. The HLA DQA1 (MHC 11) sequence (SEQ ID NO: 6) includes the signal peptide (amino acids 1-23); amino acids 24-216 are believed to make up the extracellular region, amino acids 217-239 are believed to make up the transmembrane region, and amino acids 240-254 are believed to make up the cytoplasmic region. The HLA DQB1 (MHC II) sequence (SEQ ID NO: 7) includes the signal peptide (amino acids 1-32); amino acids 33-230 are believed to make up the extracellular region, amino acids 231-251 are believed to make up the transmembrane region, and amino acids 252-261 are believed to make up the cytoplasmic region. The HLA DRA (MHC II) sequence (SEQ ID NO: 8) includes the signal peptide (amino acids 1-25); amino acids 26-216 are believed to make up the extracellular region, amino acids 217-239 are believed to make up the transmembrane region, and amino acids 240-254 are believed to make up the cytoplasmic region. The HLA DRB1 (MHC II) sequence (SEQ ID NO: 9) includes the signal peptide (amino acids 1-29); amino acids 30-227 are believed to make up the extracellular region, amino acids 228-250 are believed to make up the transmembrane region, and amino acids 251-266 are believed to make up the cytoplasmic region. The MHC E-K alpha chain (SEQ ID NO: 14) includes the signal peptide (aa 1-25), the extracellular domain (aa 26-216), the transmembrane domain (aa 217-24), and a cytoplasmic portion (aa 243-255).

[0041] As previously discussed, the MHCR of the present invention comprises at least a MHC portion and a TCR portion. In some embodiments, a MHC portion comprises one or more MHC proteins (e.g., HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB1, MHC E-K alpha, MHC E-K beta, etc.), fragments thereof, or combinations thereof. For example, in some embodiments, the MHC portion comprises a fragment of any of SEQ ID NO: 1-15.

[0042] In some embodiments, the MHC portion comprises a peptide that is at least 80% identical to a MHC protein or a fragment thereof. In some embodiments, the MHC portion comprises a peptide that is at least 85% identical to a MHC protein or a fragment thereof. In some embodiments, the MHC portion comprises a peptide that is at least 90% identical to a MHC protein or a fragment thereof. In some embodiments, the MHC portion comprises a peptide that is at least 95% identical to a MHC protein or a fragment thereof. In some embodiments, the MHC portion comprises a peptide that is at least 99% identical to a MHC protein or a fragment thereof.

[0043] In some embodiments, a fragment of a MHC protein is from 10 to 25 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 50 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 100 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 150 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 200 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 250 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 300 aa in length. In some embodiments, a fragment of a MHC protein is from 10 to 350 aa in length. In some embodiments, a fragment of a MHC protein is from 25 to 50 as in length. In some embodiments, a fragment of a MHC protein is from 25 to 100 aa in length. In some embodiments, a fragment of a MHC protein is from 25 to 150 aa in length. In some embodiments, a fragment of a MHC protein is from 25 to 200 aa in length. In some embodiments, a fragment of a MHC protein is from 25 to 250 aa in length. In some embodiments, a fragment of a MHC protein is from 25 to 300 aa in length. In some embodiments, a fragment of a MHC protein is from 25 to 350 aa in length. In some embodiments, a fragment of a MHC protein is from 50 to 100 aa in length. In some embodiments, a fragment of a MHC protein is from 50 to 150 aa in length. In some embodiments, a fragment of a MHC protein is from 50 to 200 aa in length. In some embodiments, a fragment of a MHC protein is from 50 to 250 aa in length. In some embodiments, a fragment of a MHC protein is from 50 to 300 as in length. In some embodiments, a fragment of a MHC protein is from 50 to 350 aa in length. In some embodiments, a fragment of a MHC protein is from 100 to 150 aa in length. In some embodiments, a fragment of a MHC protein is from 100 to 200 aa in length. In some embodiments, a fragment of a MHC protein is from 100 to 250 aa in length. In some embodiments, a fragment of a MHC protein is from 100 to 300 as in length. In some embodiments, a fragment of a MHC protein is from 100 to 350 aa in length. In some embodiments, a fragment of a MHC protein is from 150 to 200 aa in length. In some embodiments, a fragment of a MHC protein is from 150 to 250 aa in length. In some embodiments, a fragment of a MHC protein is from 150 to 300 as in length. In some embodiments, a fragment of a MHC protein is from 150 to 350 aa in length. In some embodiments, a fragment of a MHC protein is from 200 to 250 as in length. In some embodiments, a fragment of a MHC protein is from 200 to 300 as in length. In some embodiments, a fragment of a MHC protein is from 200 to 350 as in length. In some embodiments, a fragment of a MHC protein is from 250 to 300 aa in length. In some embodiments, a fragment of a MHC protein is from 250 to 350 as in length. In some embodiments, a fragment of a MHC protein is more than 350 aa in length.

[0044] A TCR portion may comprise one or more TCR proteins (e.g., TCRA, TCRB), one or more fragments thereof, or combinations thereof. For reference, non-limiting TCR sequences (human and mouse) are listed below in Table 2.1 and Table 2.2. The present invention is not limited to the TCR sequences in Table 2.1 and Table 2.2.

TABLE-US-00003 TABLE 2.1 Examples of Human TCR Protein Sequences SEQ ID NO. Description Amino Acid Sequence 16 Uniprot P01848 PNIQNPDPAV YQLRDSKSSD KSVCLFTDFD T cell receptor SQTNVSQSKD SDVYITDKTV LDMRSMDFKS alpha chain NSAVAWSNKS DFACANAFNN SIIPEDTFFP constant region SPESSCDVKL VEKSFETDTN LNFQNLSVIG (TRAC, TCRA) FRILLLKVAG FNLLMTLRLW SS 17 Uniprot P01850 EDLNKVFPPE VAVFEPSEAE ISHTQKATLV T cell receptor CLATGFFPDH VELSWWVNGK EVHSGVSTDP beta-1 chain QPLKEQPALN DSRYCLSSRL RVSATFWQNP constant region RNHFRCQVQF YGLSENDEWT QDRAKPVTQI (TRBC1) VSAEAWGRAD CGFTSVSYQQ GVLSATILYE ILLGKATLYA VLVSALVLMA MVKRKDF 18 Uniprot A0A5B9 DLKNVFPPEV AVFEPSEAEI SHTQKATLVC T cell receptor LATGFYPDHV ELSWWVNGKE beta-2 chain VHSGVSTDPQ PLKEQPALND SRYCLSSRLR constant region VSATFWQNPR NHFRCQVQFY (TRBC2, GLSENDEWTQ DRAKPVTQIV SAEAWGRADC TCRBC2) GFTSESYQQG VLSATILYEI LLGKATLYAV LVSALVLMAM VKRKDSRG 19 Uniprot B7Z8K6 SQPHTKPSVF VMKNGTNVAC LVKEFYPKDI T cell receptor RINLVSSKKI TEFDPAIVIS PSGKYNAVKL delta chain GKYEDSNSVT CSVQHDNKTV HSTDFEVKTD constant region STDHVKPKET ENTKQPSKSC HKPKAIVHTE (TRDC) KVNMMSLTVL GLRMLFAKTV AVNFLLTAKL FFL 20 Uniprot P0CF51 DKQLDADVSP KPTIFLPSIA ETKLQKAGTY T cell receptor LCLLEKFFPD VIKIHWQEKK SNTILGSQEG gamma-1 chain NTMKTNDTYM KFSWLTVPEK SLDKEHRCIV constant region RHENNKNGVD QEIIFPPIKT DVITMDPKDN (TRGC1) CSKDANDTLL LQLTNTSAYY MYLLLLLKSV VYFAIITCCL LRRTAFCCNG EKS 21 Uniprot P03986 DKQLDADVSP KPTIFLPSIA ETKLQKAGTY T cell receptor LCLLEKFFPD IIKIHWQEKK SNTILGSQEG gamma-2 chain NTMKTNDTYM KFSWLTVPEE SLDKEHRCIV constant region RHENNKNGID QEIIFPPIKT DVTIVDPKDS (TRGC2, YSKDANDVIT MDPKDNWSKD ANDTLLLQLT TCRGC2) NTSAYYMYLL LLLKSVVYFA IITCCLLGRT AFCCNGEKS

TABLE-US-00004 TABLE 2.2 Examples of Mouse TCR Protein Sequences SEQ ID NO. Description Amino Acid Sequence 22 Uniprot P01849 PYIQNPEPAV YQLKDPRSQD STLCLFTDFD T cell receptor alpha SQINVPKTME SGTFITDKTV LDMKAMDSKS chain constant region NGAIAWSNQT SFTCQDIFKE TNATYPSSDV (TCRA-mouse) PCDATLTEKS FETDMNLNFQ NLSVMGLRIL (underlined portion LLKVAGFNLL MTLRLWSS refers to sequence also used in SEQ ID NO: 30) 23 Uniprot P01852 EDLRNVTPPK VSLFEPSKAE IANKQKATLV T cell receptor beta-1 CLARGFFPDH VELSWWVNGK EVHSGVSTDP chain constant region QAYKESNYSY CLSSRLRVSATFWHNPRNHF (TCB1-mouse) RCQVQFHGLS EEDKWPEGSP KPVTQNISAE AWGRADCGIT SASYQQGVLS ATILYEILLG KATLYAVLVS TLVVMAMVKR KNS 24 Uniprot P01851 EDLRNVTPPK VSLFEPSKAE IANKQKATLV T cell receptor beta-2 CLARGFFPDH VELSWWVNGK EVHSGVSTDP chain constant region QAYKESNYSY CLSSRLRVSA TFWHNPRNHF (TCB2-mouse) RCQVQFHGLS EEDKWPEGSP KPVTQNISAE (underlined portion AWGRADCGIT SASYHQGVLS ATILYEILLG refers to sequence used KATLYAVLVS GLVLMAMVKK KNS in SEQ ID NO: 31, 32) 25 Uniprot P01853 DKRLDADISP KPTIFLPSVA ETNLHKTGTY T cell receptor gamma LCLLEKFFPD VIRVYWKEKN GNTILDSQEG chain constant region DTLKTKGTYM KFSWLTVPER AMGKEHSCIV C10.5 (TCC1-mouse) KHENNKGGAD QEIFFPSIKK VATTCWQDKN DVLQFQFTST SAYYTYLLLL LKSVIYLAII SFSLLRRTSV CGNEKKS 26 Uniprot P03985 DKKLDADISP KPTIFLPSVA ETNLHKTGTY T cell receptor gamma LCVLEKFFPD VIRVYWKEKK GNTILDSQEG chain constant region DMLKTNDTYM KFSWLTVPER SMGKEHRCIV C7.5 (TCC2-mouse) KHENNKGGAD QEIFFPTIKK VAVSTKPTTC WQDKNDVLQL QFTITSAYYT YLLLLLKSVI YLAIISFSLL RRTSVCCNEK KS 27 Uniprot P06334 PSDKRLDADI SPKPTIFLPS VAETNLHKTG T cell receptor gamma TYLCILEKFF PDVIRVYWKD KNGNTILDSQ chain constant region EGDTLKTKGT YMKFSWLTVP ERSMGKEHRC DFL12 (TCC3-mouse) IVKHENNKGG ADQEIFFPSI KKVATTCWQD KNDVLQLQFM STSAYYTYLL LLLKSVIYLA IISFSLLRRT SVCCNEKRS 28 Uniprot P06335 DKRTDSDFSP KPTIFLPSAA ETNLHKAGTY T cell receptor gamma LCLLEKFFPK VIRVYWKEKD GEKILESQEG chain constant region NTIKTNDRYM KFSWLTVTED SMAKEHSCIV 5/10-13 (TCC4-mouse) KHENNKRGVD QEILFPPIGK AFTTINVNPR DSVLRHENVN NATDLEDCMK GRKDMLQLQV TTTYAFYTYL ILFFKSMVHL AFVVFCLFRR AAMSCDDQRS

[0045] Referring to the TRAC protein (SEQ ID NO: 16) in Table 2, amino acids 118-137 are believed to make up the transmembrane domain, and amino acids 138-142 are believed to make up the cytoplasmic domain. Referring to the TRBC1 protein (SEQ ID NO: 17) in Table 2, amino acids 151-171 are believed to make up the transmembrane domain. Referring to the TRBC2 protein (SEQ ID NO: 18) in Table 2, amino acids 145-167 are believed to make up the transmembrane domain. Referring to the TRDC protein (SEQ ID NO: 19) in Table 2, amino acids 130-152 are believed to make up the transmembrane domain. Referring to the TRGC1 protein (SEQ ID NO: 20) in Table 2, amino acids 139-161 are believed to make up the transmembrane domain. Referring to the TRGC2 protein (SEQ ID NO: 21) in Table 2, amino acids 157-177 are believed to make up the transmembrane domain, and amino acids 178-189 are believed to make up the cytoplasmic domain.

[0046] As previously discussed, the MHCR of the present invention comprises at least a MHC portion and a TCR portion. In some embodiments, a TCR portion comprises one or more TCR proteins (e.g., TRAC, TRBC1, TRBC2, TRDC, TRCG1, TRCG2, TCRA-mouse, TCB1-mouse, TCB2-mouse, TCC1-mouse, TCC2-mouse, TCC3 mouse, TCC4 mouse, etc.), fragments thereof, or combinations thereof. For example, in some embodiments, the TCR portion comprises a fragment of any of SEQ ID NO: 16-28. (In some embodiments, the fragment is from 5 to 10 aa in length. In some embodiments, the fragment is from 10 to 20 aa in length, in some embodiments, the fragment is from 10 to 30 aa in length. IN some embodiments, the fragment is from 10 to 40 aa in length. In some embodiments, the fragment is from 10 to 50 aa in length, etc.

[0047] In some embodiments, the TCR portion comprises a peptide that is at least 80% identical to a TCR protein (e.g., any of SEQ ID NO: 16-28), or a fragment thereof. In some embodiments, the TCR portion comprises a peptide that is at least 85% identical to a TCR protein (e.g., any of SEQ ID NO: 16-28), or a fragment thereof. In some embodiments, the TCR portion comprises a peptide that is at least 90% identical to a TCR protein (e.g., any of SEQ ID NO: 16-28), or a fragment thereof. In some embodiments, the TCR portion comprises a peptide that is at least 95% identical to a TCR protein (e.g., any of SEQ ID NO: 16-28), or a fragment thereof. In some embodiments, the TCR portion comprises a peptide that is at least 99% identical to a TCR protein (e.g., any of SEQ ID NO: 16-28), or a fragment thereof.

[0048] In some embodiments, a fragment of a TCR protein is from 10 to 25 aa in length. In some embodiments, a fragment of a TCR protein is from 10 to 50 as in length. In some embodiments, a fragment of a TCR protein is from 10 to 100 aa in length. In some embodiments, a fragment of a TCR protein is from 10 to 150 aa in length. In some embodiments, a fragment of a TCR protein is from 25 to 50 aa in length. In some embodiments, a fragment of a TCR protein is from 25 to 100 aa in length. In some embodiments, a fragment of a TCR protein is from 25 to 150 aa in length. In some embodiments, a fragment of a TCR protein is from 50 to 100 aa in length. In some embodiments, a fragment of a TCR protein is from 50 to 150 aa in length. In some embodiments, a fragment of a TCR protein is from 100 to 150 as in length. In some embodiments, a fragment of a TCR protein is more than 150 aa in length.

[0049] In some embodiments, the MHCR comprises a peptide antigen. Any appropriate peptide antigen may be used. The peptide antigen in the pMHCR complex directs the specificity of the pMHCR molecule, therefore the pMHCR molecule will be specific for T cells with TCRs that are specific for that peptide antigen/pMHCR. A non-limiting example of a peptide antigen that may be used with the MHCR is moth cytochrome c peptide (aa 88-103, ANERADLIAYLKQATK (SEQ ID NO: 29)). The peptide antigens used in the Examples (see below) are peptides commonly used as model antigens in mouse models. Any appropriate peptide antigen may be used, and the present invention is not limited to the peptide antigens disclosed herein. For example, in some embodiments, the peptide antigen comprises any immunodominant peptide antigen identified to bind a class I or class 11 MHC. In some embodiments, the peptide antigen comprises any immunodominant peptide antigen identified to bind a class I or class II MHC and elicit a response. A response may include but is not limited to an autoimmune response, an allergic response, an asthma response, or an inappropriate Treg response. The peptide antigen may be any appropriate length.

[0050] In some embodiments, the MHCR comprises at least a portion of a MHC molecule that allows for binding to an appropriate TCR. In some embodiments, the MHCR comprises at least a portion of a MHC molecule that allows for binding to an appropriate TCR and at least a portion of a TCR molecule (e.g., a portion of a TCR molecule that allows for appropriate signaling and/or complexing subunits such as CD3 subunits). In some embodiments, the MHCR comprises a transmembrane domain that is at least partially derived from (i) a MHC molecule, (ii) a TCR molecule, or (iii) both the MHC molecule and TCR molecule. In some embodiments, the MHCR comprises a transmembrane domain, wherein a portion (or all) of the transmembrane domain is not derived from a MHC molecule or a TCR molecule. In some embodiments, the MHCR comprises an extracellular domain that is at least partially derived from (i) a MHC molecule, (ii) a TCR molecule, or (iii) both the MHC molecule and TCR molecule. In some embodiments, the MHCR comprises an extracellular domain, wherein a portion of the extracellular domain is not derived from a MHC molecule or a TCR molecule.

[0051] As an example, in some embodiments, the MHCR comprises at least a portion of the extracellular domain of a MHC molecule (e.g., the extracellular domain of HLA-DRA) and at least a portion of the transmembrane domain of a TCR molecule and at least a portion of the cytoplasmic domain of a TCR molecule. As another example, in some embodiments, the MHCR comprises at least a portion of the extracellular domain of a TCR molecule.

[0052] The present invention also features redirected cells, such as redirected T cells, expressing MHCRs of the present invention, e.g., as described above. Without wishing to limit the present invention to any theory or mechanism, the MHCRs are generally adapted to recognize and bind to appropriate (specific) TCRs. In some embodiments, the MHCR is expressed in a CD8+ T cell (e.g., a cytotoxic T cell, T.sub.C cells, CTLs). In some embodiments, the MHCR is expressed in a CD4+ T cell (e.g., a T helper cell, T.sub.H cell or a regulatory T cell (Treg cell)). The present invention is not limited to the expression of MHCRs in T cells, nor is the present invention limited to expression of MHCRs in CD8+ or CD4+ T cells, e.g., the MHCRs may be expressed in CD8+/CD4+ thymocytes, .gamma..delta.T cells, NK cells, NK T cells, etc. In some embodiments, the MHCR of the redirected T cell complexes or is adapted to complex with CD3 subunits (e.g., forming a MHCR-CD3 complex).

[0053] In some embodiments, the MHCR comprises a MHC portion derived from an extracellular portion of a MHC protein and a TCR portion derived from a transmembrane domain of a TCR protein. In some embodiments, the MHC portion and TCR portion are directly linked. In some embodiments, the MHC portion and TCR portion are separated by a linker. In some embodiments, the linker comprises a glycine-rich linker.

[0054] The present invention is not limited to the MHC portions and TCR portions described herein. For example, the MHC portion may comprise any MHC peptide, e.g., an extracellular domain (or a portion thereof) of any MHC peptide. The TCR portion may comprise any TCR peptide, e.g., a transmembrane domain (or portion thereof) of any TCR peptide. Further, the present invention is not limited to antigens, signaling molecules, and cell surface receptor ligands described herein, e.g., the present invention may be applicable to a wide range of MHC molecules, TCR molecules, antigens, signaling molecules cell surface receptor ligands, etc.

Surrogate Coreceptors (SCRs)

[0055] The present invention also features chimeric surrogate coreceptors (SCR), e.g., receptors that recruit signaling molecules (e.g., kinases such as but not limited to Src kinases (e.g., Lck), phosphatases, etc.). In some embodiments, the SRCs recruit signaling molecules (e.g., kinases) to the MHCR and/or CD3 subunits. The present invention also features cells expressing a SCR. In some embodiments, redirected cells, e.g., redirected T cells, express both a MHCR and a SCR. In some embodiments, cells express more than one type of SCR. Without wishing to limit the present invention to any theory or mechanism, it is believed that certain SCRs may enhance signaling through the pMHCR-CD3 complex.

[0056] In some embodiments, the SCR comprises a cell surface receptor ligand (e.g., T cell surface receptor ligand) fused to a signaling molecule (e.g., kinase (e.g., Lck or other appropriate kinase), phosphatase, etc.). In some embodiments, the cell surface receptor ligand and the kinase are separated by a linker, e.g., a peptide linker or any other appropriate linker. The signaling molecule is not limited to a kinase or a phosphatase.

[0057] In some embodiments, the cell surface receptor ligand (e.g., T cell surface receptor ligand) comprises CD80, CD86, fragments thereof, or combinations thereof. The present invention is not limited to CD80 and CD86; any other appropriate cell surface receptor ligand (or a fragment thereof) may be used. For example, in some embodiments, the cell surface receptor ligand comprises a CD28 ligand, a CTLA-4 ligand, an ICOS ligand, an OX40 ligand, a PD-1 ligand (e.g., PD-1L), a CD2 ligand, etc.

[0058] As an example, in some embodiments, when a T cell is expressing a pMHCR (a MHCR with a peptide antigen), the pMHCR may complex with CD3 subunits, forming a pMHCR-CD3 complex. If the cell is also expressing a CD80-Lck SCR, then when the pMHCR binds a TCR on a target T cell, the CD80-Lck may also bind to CD28 on the same target T cell. Without wishing to limit the present invention to any theory or mechanism, it is believed that then the CD80-Lck SCR should recruit Lck to the pMHCR-CD3 complex to phosphorylate the pMHCR-CD3 ITAMs for robust signaling.

[0059] In some embodiments, the SCR is engineered (e.g., a particular cell surface receptor ligand of the SCR is selected) to target a specific set of target cells. For example, T follicular helper cells express a molecule called PD-1 and these cells provide help to B cells to make autoantibodies in autoimmune diseases such as Lupus. The ligand for PD-1 is PD-1L, so a SCR comprising PD-1L and Lck may be co-expressed with a pMHCR recognized by the TCR of the T follicular helper cell. This may allow for targeting of this specific T follicular helper cell population.

[0060] The present invention also features methods of use of said MHCRs, SCRs, and/or said redirected cells, for example for immunotherapy. In some embodiments, the redirected cells may eliminate autoreactive T cells, regulatory T cells (Tregs) that protect tumor cells by suppressing anti-tumor T cell responses, or any other appropriate T cell. For example, in some embodiments, the MHCR is an auto-antigen MHCR, and the MHCR's target is an autoreactive T cell.

Examples

[0061] Example 1: Redirected T cells targeting CD4 T Helper Cells. Example 1 describes a non-limiting experimental approach to target CD4 T cells. A prototype pMHCR was engineered with a peptide antigen: the moth cytochrome c peptide (SEQ ID NO: 29) was fused to the mouse class II MHC I-E.sup.k (MCC:I-E.sup.k; e.g., see SEQ ID NO: 31). This pMHCR was expressed (e.g., retrovirally expressed) in T cell hybridomas. It was determined that this pMHCR (e.g., pMHCR-CD3 complex) was expressed on the surface of T cell hybridomas (see FIG. 4). IL-2 production was induced after interactions with cognate TCRs (e.g., 5c.c7, 2B4), yet an irrelevant peptide (control peptide antigen) in the pMHCR-CD3 complex rendered it non-stimulatory (data not shown).

[0062] Lck fusions were generated with known ligands for T cell surface receptors. For example, all T cells express CD28. Lck fusions with CD28 ligands (e.g., CD80, CD86) were engineered to generate surrogate coreceptors (SCRs), e.g., CD80-Lck (see SEQ ID NO: 33, SEQ ID NO: 38), e.g., CD86-Lck (see SEQ ID NO: 34, SEQ ID NO: 39). When the pMHCR-CD3 complex was co-expressed with SCR CD80-Lck in hybridomas, these cells produced significantly more IL-2 in response to cells expressing the 2B4 TCR ligand+CD28 than they did in response to cells expressing only the 284 TCR ligand (see FIG. 5). This suggested that signaling through the pMHCR-CD3 complex could be augmented through the use of a SCR.

[0063] MCC:IE.sup.k pMHCR-CD3 and the SCR CD80-Lck or HB:IE.sup.k pMHCR-CD3 (e.g., see SEQ ID NO: 32) and the SCR CD80-Lck were expressed in in vitro differentiated CD8 cytotoxic T cells (CTLs) and their ability to kill 5c.c7 TCR transgenic CD4 T cells expressing the TCR specific for the MCC:IE.sup.k pMHCR was evaluated. Surface expression of the pMHCRs on the redirected CTLs was observed, suggesting that these chimeric receptor modules compete with the endogenous TCR for assembly with the endogenous CD3 subunits (data not shown). CTLs expressing the MCC:IE.sup.k pMHCR robustly killed the target CD4 T cells while those expressing the null HB:IE.sup.k pMHCR did not (see FIG. 6). This suggests that CD8 T cells can be redirected to target and eliminate antigen-specific CD4 T cells.

[0064] Example 2: Redirected T cells targeting CD4 T Helper Cells in Allergic Asthma. Example 2 describes a non-limiting experimental approach to target CD4 T helper cells involved in allergic asthma, e.g., to help eliminate naive Der p 1-specific CD4 T cells from the repertoire prior to House Dust Mite (HDM) sensitization. Without wishing to limit the present invention to any theory or mechanism, it is believed that eliminating allergen-specific CD4 T cells from the repertoire may help prevent the onset of T.sub.H2 immunity upon HDM sensitization.

[0065] A pMHCR (pMHCR-CD3 complex) will be retrovirally expressed in in vitro activated CTLs. The pMHCR will bear a pMHCR comprising either the immunodominant HDM-derived Der p 1 epitope (aa117-127) in the context of I-A.sup.b (Derp1:IA.sup.b) or the immunodominant West Nile Virus peptide from the envelope protein (aa641-655) in the context of I-A.sup.b (E641:IA.sup.b). The E641:IA.sup.b pMHCR cells will serve as a non-specific control population.

[0066] The in vitro activated CTLs will also be transduced with a CD80-Lck SCR to enhance signaling. These redirected CTLs will then be transferred intravenously into C57Bl/6 mice to target and eliminate Derp1:IA.sup.b- or E641:IA.sup.b-specific naive CD4 T cells from the endogenous repertoire. After a certain length of time, e.g., 1 week, the elimination of antigen-specific CD4 T cells will be evaluated. This will be performed via tetramer enrichment experiments using a Derp1:IA.sup.b tetramer and a E641:IA.sup.b tetramer. The presence of the redirected CD8 T cells will also be assessed by flow cytometry by gating on CD3+CD8+IA.sup.b+ T cells since mouse T cells do not express class II MHC.

[0067] After determining if the redirected CTLs eliminate the target population, mice that received redirected CTLs one-week prior will be sensitized with HDM (e.g., intranasally, e.g., with HDM extracts). This will be done even if endogenous CD4 T cells specific for Derp1:IA.sup.b are detected, but only if redirected T cells are still present in the mice. This may help to determine if activation of the CD4 T cells made them more susceptible to targeting by the redirected CTLs.

[0068] Example 3: Redirected T cells targeting CD4 T Helper Cells in Lungs After Sensitization. Example 3 describes a non-limiting experimental approach to target CD4 T helper cells in lungs of HDM-sensitized mice. Without wishing to limit the present invention to any theory or mechanism, it is believed that eliminating allergen-specific CD4 T cells from the lungs of HDM-sensitized mice may help attenuate T.sub.H2 immunity.

[0069] Der p 1-specific CD4 T cells will be targeted similarly to Example 2, but only after HDM sensitization. In brief, mice will be sensitized with HDM according to the protocol described above. They will then receive redirected Derp1:IA.sup.b or E641:IA.sup.b pMHCR-CD3 CTLs on day 14. Various surrogate co-receptors will be employed to explore the efficacy of the technology and approach. For example, the CD80-Lck fusion SCR will be used, as well as others, e.g., a TIM-4-Lck SCR (since the TIM-1 expressed on CD4 T cells is genetically linked with asthma and this combination for targeting might enhance effectiveness). One week after transfer of redirected CTLs, cytokine and cellular analysis will be performed as described above in Example 2 so as to assess the impact of these cells on the lung cytokine milieu and cellularity. The status of the redirected CTLs will also be evaluated.

[0070] Example 4: Attenuation of Der p 1-specific CD4 T cell function in situ. Example 4 describes a non-limiting experimental approach to redirect Tregs against Der p 1-specific CD4 T cells. Without wishing to limit the present invention to any theory or mechanism, it is believed that this may help attenuate function of said CD4 T cells and help diminish T.sub.H2 immunity.

[0071] In vitro generated induced Tregs (iTregs) expressing a MHCR will be tested for efficacy in reducing HDM-induced airway hypersensitivity. Induced Tregs (iTregs) will be generated in vitro and transduced with pMHCR and SCRs as described in Examples 2 and 3 above. These cells will then either be transferred prior to HDM sensitization as in Example 2 or after sensitization as in Example 3. Evaluation of the lung cytokine milieu and cellularity will then be performed as described above.

[0072] Table 3 shows examples of protein sequences for reagents the above examples. Table 4 shows the nucleotide sequences for the proteins in Table 3. Note that in SEQ ID NO: 30, a portion is derived from SEQ ID NO: 14 and a portion is derived from SEQ ID NO: 22. In SEQ ID NO: 31, a portion is derived from SEQ ID NO: 15, a portion is derived from SEQ ID NO: 23, and a portion is derived from SEQ ID NO: 29 (and other residues may correspond to a glycine-rich linking region). In SEQ ID NO: 32, a portion is derived from SEQ ID NO: 15 and a portion is derived from SEQ ID NO: 23 (and other residues may correspond to a glycine-rich linking region).

TABLE-US-00005 TABLE 3 Peptide sequences for reagents in Examples. SEQ ID NO. Description Amino Acid Sequence 30 I-E.sup.k.alpha.-TCR.alpha. MATIGALLLRFFFIAVLMSSQKSWAIKEEHTIIQAEFY Note: underlined LLPPKRGEFMFDFDGDEIFHVDIEKSETIWRLEEFA portion is from SEQ KFASFEAQGALANIAVDKANLDVMKERSNNTPDAN ID NO: 14 (MHC VAPEVTVLSRSPVNLGEPNILICFIDKFSPPVVNVIW portion), bold portion FRNGRPVTEGVSETVFLPRDDHLFRKFHYLTFLPST is from SEQ ID NO: DDFYDCEVDHWGLEEPLRKHWEFEEKTLLPETKE 22 (TCR portion) CDATLTEKSFETDMNLNFQNLSVMGLRILLLKVAG FNLLMTLRLWSS 31 MCC: I-E.sup.k.beta.-TCR.beta. MVWLPRVPCVAAVILLLTVLSPPVALVRDSGSANER (note: italic portion ADLIAYLKQATKEFRSGGGGSLVPRGSGGGGSVDR shows peptide PWFLEYCKSECHFYNGTQRVRLLVRYFYNLEENLR antigen sequence, FDSDVGEFRAVTELGRPDAENWNSQPEFLEQKRA underlined portion is EVDTVCRHNYEIFDNFLVPRRVEPTVIVYPTKTQPL from SEQ ID NO: 15 EHHNLLVCSVSDFYPGNIEVRWFRNGKEEKTGIVS (MHC portion), and TGLVRNGDWTFQTLVMLETVPQSGEVYTCQVEHP bold portion is from SLTDPVTVEWKAQSTSAQNKCGITSASYHQGVLSA SEQ ID NO: 24 (TCR TILYEILLGKATLYAVLVSGLVLMAMVKKKNSAAA portion) 32 HB: I-E.sup.k.beta.-TCR.beta. MVWLPRVPCVAAVILLLTVLSPPVALVRDSGSGKKVI Note: italic portion TAFNEGLKEFRSGGGGSLVPRGSGGGGSVDRPWF shows peptide LEYCKSECHFYNGTQRVRLLVRYFYNLEENLRFDS antigen sequence, DVGEFRAVTELGRPDAENWNSQPEFLEQKRAEVD underlined portion is TVCRHNYEIFDNFLVPRRVEPTVIVYPTKTQPLEHH from SEQ ID NO: 15 NLLVCSVSDFYPGNIEVRWFRNGKEEKTGIVSTGLV (MHC portion), and RNGDWTFQTLVMLETVPQSGEVYTCQVEHPSLTD bold portion is from PVTVEWKAQSTSAQNKCGITSASYHQGVLSATILY SEQ ID NO: 24 (TCR EILLGKATLYAVLVSGLVLMAMVKKKNSAAA portion) 33 CD80-Lck MACNCQLMQDTPLLKFPCPRLILLFVLLIRLSQVSS (mCD80-mLck DVDEQLSKSVKDKVLLPCRYNSPHEDESEDRIYWQ fusion) KHDKVVLSVIAGKLKVWPEYKNRTLYDNTTYSLIILG LVLSDRGTYSCVVQKKERGTYEVKHLALVKLSIKAD FSTPNITESGNPSADTKRITCFASGGFPKPRFSWLE NGRELPGINTTISQDPESELYTISSQLDFNTTRNHTI KCLIKYGDAHVSEDFTWEKPPEDPPDSKNTLVLFG AGFGAVITVVVIVVIIKCFCKHRSCFRRNEASRETNN SLTFGPEEALAEQTVFLTTSHYPIVPLDSKISLPIRNG SEVRDPLVTYEGSLPPASPLQDNLVIALHSYEPSHD GDLGFEKGEQLRILEQSGEVVWKAQSLTTGQEGFIP FNFVAKANSLEPEPWFFKNLSRKDAERQLLAPGNT HGSFLIRESESTAGSFSLSVRDFDQNQGEWKHYKI RNLDNGGFYISPRITFPGLHDLVRHYTNASDGLCTK LSRPCQTQKPQKPVVWEDEWEVPRETLKLVERLGA GQFGEVWMGYYNGHTKVAVKSLKQGSMSPDAFLA EANLMKQLQHPRLVRLYAVVTQEPIYIITEYMENGSL VDFLKTPSGIKLNVNKLLDMAAQIAEGMAFIEEQNYI HRDLRAANILVSDTLSCKIADFGLARLIEDNEYTARE GAKFPIKWTAPEAINYGTFTIKSDVWSFGILLTEIVTH GRIPYPGMTNPEVIQNLERGYRMVRPDNCPEELYH LMMLCWKERPEDRPTFDYLRSVLDDFFTATEGQY QPQPGT 34 CD86-Lck MDPRCTMGLAILIFVTVLLISDAVSVETQAYFNGTAY (mCD86-mLck LPCPFTKAQNISLSELVVFWQDQQKLVLYEHYLGTE fusion) KLDSVNAKYLGRTSFDRNNWTLRLHNVQIKDMGSY DCFIQKKPPTGSIILQQTLTELSVIANFSEPEIKLAQN VTGNSGINLTCTSKQGHPKPKKMYFLITNSTNEYGD NMQISQDNVTELFSISNSLSLSFPDGVWHMTVVCV LETESMKISSKPLNFTQEFPSPQTYWKEITASVTVAL LLVMLLIIVCHKKPNQPSRPSNTASKLERDSNADRE TINLKELEPQIASAKPNAECTSHYPIVPLDSKISLPIR NGSEVRDPLVTYEGSLPPASPLQDNLVIALHSYEPS HDGDLGFEKGEQLRILEQSGEWWKAQSLTTGQEG FIPFNFVAKANSLEPEPWFFKNLSRKDAERQLLAPG NTHGSFLIRESESTAGSFSLSVRDFDQNQGEVVKH YKIRNLDNGGFYISPRITFPGLHDLVRHYTNASDGL CTKLSRPCQTQKPQKPWWEDEWEVPRETLKLVER LGAGQFGEVWMGYYNGHTKVAVKSLKQGSMSPD AFLAEANLMKQLQHPRLVRLYAVVTQEPIYIITEYME NGSLVDFLKTPSGIKLNVNKLLDMAAQIAEGMAFIE EQNYIHRDLRAANILVSDTLSCKIADFGLARLIEDNE YTAREGAKFPIKWTAPEAINYGTFTIKSDVWSFGILL TEIVTHGRIPYPGMTNPEVIQNLERGYRMVRPDNC PEELYHLMMLCWKERPEDRPTFDYLRSVLDDFFTA TEGQYQPQPGT

TABLE-US-00006 TABLE 4 Examples of DNA sequences for encoding the proteins in Table 3. SEQ ID NO. Description Gene Sequence 35 I-E.sup.k.alpha.-TCR.alpha. aataagcttctcgagcgccaccATGGCCACAATTGGAGCCCTGCTGTTAAGATTT fusion TTCTTCATTGCTGTTCTGATGAGCTCCCAGAAGTCATGGGCTATCAAAG AGGAACACACCATCATCCAGGCGGAGTTCTATCTTTTACCAGACAAACG TGGAGAGTTTATGTTTGACTTTGACGGCGATGAGATTTTCCATGTAGAC ATTGAAAAGTCAGAGACCATCTGGAGACTTGAAGAATTTGCAAAGTTTG CCAGCTTTGAGGCTCAGGGTGCACTGGCTAATATAGCTGTGGACAAAG CTAACCTGGATGTCATGAAAGAGCGTTCCAACAACACTCCAGATGCCA ACGTGGCCCCAGAGGTGACTGTACTCTCCAGAAGCCCTGTGAACCTG GGAGAGCCCAACATCCTCATCTGTTTCATTGACAAGTTCTCCCCTCCA GTGGTCAATGTCACCTGGTTCCGGAATGGACGGCCTGTCACCGAAGG CGTGTCAGAGACAGTGTTTCTCCCGAGGGACGATCACCTCTTCCGCAA ATTCCACTATCTGACCTTCCTGCCCTCCACAGATGATTTCTATGACTGTG AGGTGGATCACTGGGGTTTGGAGGAGCCTCTGCGGAAGCACTGGGAG TTTGAAGAGAAAACCCTCCTCCCAGAAACTAAAGAGtgtgatgccacgttgacc gagaaaaGCTTTGAAACAGATATgaacctaaactttcaaaacctgtcaGTTATGGGAC TCCGAATCCtcctgctgaaagtagcgggatttaacCTGCTCATGACGCTgaggctgtggt ccagttgaggatccgcta 36 MCC: I-E.sup.k.beta.-T aatCTCGAGCGCCACCATGGTGTGGCTCCCCAGAGTTCCCTGTGTGGC CR.beta. fusion AGCTGTGATCCTGTTGCTGACAGTGCTGAGCCCTCCAGTGGCTTTGGT CAGAGACTCCGGATCCGCCAACGAGAGGGCCGACCTGATCGCCTACC TGAAGCAGGCCACCAAGGAATTCAGATCCGGAGGCGGAGGCTCCCTG GTGCCTCGGGGCTCCGGAGGCGGAGGCTCCGTCGACAGACCATGGT TTTTGGAATACTGTAAATCTGAGTGTCATTTCTACAACGGGACGCAGCG CGTGCGGCTTCTGGTAAGATACTTCTACAACCTGGAGGAGAACCTGCG CTTCGACAGCGACGTGGGCGAGTTCCGCGCGGTGACCGAGCTGGGG CGGCCAGACGCCGAGAACTGGAACAGCCAGCCGGAGTTCCTGGAGC AAAAGCGGGCCGAGGTGGACACGGTGTGCAGACACAACTATGAGATC TTCGATAACTTCCTTGTGCCGCGGAGAGTTGAGCCTACGGTGACTGTG TACCCCACAAAGACGCAGCCCCTGGAACACCACAACCTCCTGGTCTG CTCTGTGAGTGACTTCTACCCTGGCAACATTGAAGTCAGATGGTTCCG GAATGGCAAGGAGGAGAAAACAGGAATTGTGTCCACGGGCCTGGTCC GAAATGGAGACTGGACCTTCCAGACACTGGTGATGCTGGAGACGGTT CCTCAGAGTGGAGAGGTTTACACCTGCCAGGTGGAGCATCCCAGCCT GACCGACCCTGTCACGGTCGAGTGGAAAGCACAGTCCACATCTGCAC AGAACAAGtgtggaatcactagtgcatcctatcatcagggggttctgtctgcaaccatcctctatgag atcctactggggaaggccaccctatatgctgtgctggtcagtggcctagtgctgatgGCCATGGTC AAGAAAAAAAATTCCgcggccgcatgatgagatctgagctccatagaggcg 37 HB: I-E.sup.k.beta.-TC aatCTCGAGCGCCACCATGGTGTGGCTCCCCAGAGTTCCCTGTGTGGC R.beta. fusion AGCTGTGATCCTGTTGCTGACAGTGCTGAGCCCTCCAGTGGCTTTGGT CAGAGACTCCGGATCCGGCAAGAAGGTGATCACCGCCTTCAACGAGG GCCTGAAGGAATTCAGATCCGGAGGCGGAGGCTCCCTGGTGCCTCGG GGCTCCGGAGGCGGAGGCTCCGTCGACAGACCATGGTMTGGAATA CTGTAAATCTGAGTGTCATTTCTACAACGGGACGCAGCGCGTGCGGCT TCTGGTAAGATACTTCTACAACCTGGAGGAGAACCTGCGCTTCGACAG CGACGTGGGCGAGTTCCGCGCGGTGACCGAGCTGGGGCGGCCAGAC GCCGAGAACTGGAACAGCCAGCCGGAGTTCCTGGAGCAAAAGCGGG CCGAGGTGGACACGGTGTGCAGACACAACTATGAGATCTTCGATAACT TCCTTGTGCCGCGGAGAGTTGAGCCTACGGTGACTGTGTACCCCACA AAGACGCAGCCCCTGGAACACCACAACCTCCTGGTCTGCTCTGTGAG TGACTTCTACCCTGGCAACATTGAAGTCAGATGGTTCCGGAATGGCAA GGAGGAGAAAACAGGAATTGTGTCCACGGGCCTGGTCCGAAATGGAG ACTGGACCTTCCAGACACTGGTGATGCTGGAGACGGTTCCTCAGAGT GGAGAGGTTTACACCTGCCAGGTGGAGCATCCCAGCCTGACCGACCC TGTCACGGTCGAGTGGAAAGCACAGTCCACATCTGCACAGAACAAGtgt ggaatcactagtgcatcctatcatcagggggttctgtctgcaaccatcctctatgagatcctactggggaa ggccaccctatatgctgtgctggtcagtggcctagtgctgatgGCCATGGTCAAGAAAAAAA ATTCCgcggccgcatgatgagatctgagctccatagaggcg 38 CD80-Lck acgtctagatacctcgaggccaccATGGCTTGCAATTGTCAGttgatgcaggatacaccact (mCD80-mL cctcaagtttccatgtccaaggctcattcttctctttgtgctgctgattcgtctttcacaagt- gtcttcagatgttg ck fusion) atgaacaactgtccaagtcagtgaaagataaggtattgctgccttgccgttacaactctcctcatgaagat gagtctgaagaccgaatctactggcaaaaacatgacaaagtggtgctgtctgtcattgctgggaaacta aaagtgtggcccgagtataagaaccggactttatatgacaacactacctactctcttatcatcctgggcct ggtcctttcagaccggggcacatacagctgtgtcgttcaaaagaaggaaagaggaacgtatgaagtta aacacttggctttagtaaagttgtccatcaaagctgacttctctacccccaacataactgagtctggaaac ccatctgcagacactaaaaggattacctgctttgcttccgggggtttcccaaagcctcgcttctcttggttg- g aaaatggaagagaattacctggcatcaatacgacaatttcccaggatcctgaatctgaattgtacaccat tagtagccaactagatttcaatacgactcgcaaccacaccattaagtgtctcattaaatatggagatgctc acgtgtcagaggacttcacctgggaaaaacccccagaagaccctcctgatagcaagaacacacttgt gctctttggggcaggattcggcgcagtaataacagtcgtcgtcatcgttgtcatcatcaaatgcttctgtaa gcacagaagctgtttcagaagaaatgaggcaagcagagaaacaaacaacagccttaccttcgggcc tgaagaagcattagctGAACAGACCGTCTTCCTTaccactagtCACTATCCCATAGT Cccactggacagcaagatctcgctgcccatccggaatggctctgaagtgcgggacccactggtcacct atgagggatctctcccaccagcatccccgctgcaagacaacctggttatcgccctgcacagttatgagc cctcccatgatggagacttgggctttgagaagggtgaacagctccgaatcctggagcagagcggtgag tggtggaaggctcagtccctgacgactggccaagaaggcttcattcccttcaacttcgtggcgaaagca aacagcctggagcctgaaccttggttcttcaagaatctgagccgtaaggacgccgagcggcagcttttg gcgcccgggaacacgcatggatccttcctgatccgggaaagcgaaagcactgcggggtccttttccctg tcggtcagagacttcgaccagaaccagggagaagtggtgaaacattacaagatccgtaacctagaca acggtggcttctacatctcccctcgtatcacttttcccggattgcacgatctagtccgccattacaccaacg- c ctctgatgggctgtgcacaaagttgagccgtccttgccagacccagaagccccagaaaccatggtggg aggacgaatgggaagttcccagggaaacactgaagttggtggagcggctgggagctggccagttcgg ggaagtgtggatggggtactacaacggacacacgaaggtggcggtgaagagtctgaaacaaggga gcatgtcccccgacgccttcctggctgaggctaacctcatgaagcagctgcagcacccgcggctagtcc ggctttatgcagtggtcacccaggaacccatctacatcatcacggaatacatggagaacgggagccta gtagattttctcaagactccctcgggcatcaagttgaatgtcaacaaacttttggacatggcagcccagatt gcagagggcatggcgttcatcgaagaacagaattacatccatcgggacctgcgcgccgccaacatcc tggtgtctgacacgctgagctgcaagattgcagactttggcctggcgcgcctcattgaggacaatgagta cacggcccgggagggggccaaatttcccattaagtggacagcaccagaagccattaactatgggacc ttcaccatcaagtcagacgtgtggtccttcgggatcttgcttacagagatcgtcacccacggtcgaatccct tacccaggaatgaccaaccctgaagtcattcagaacctggagagaggctaccgcatggtgagacctg acaactgtccggaagagctgtaccacctcatgatgctgtgctggaaggagcgcccagaggaccggcc cacgtttgactaccttcggagtgttctggatgacttcttcacagccacagagggcCAGTACCAGCC CCAGCCTggtacctagtgagaattctacatg 39 CD86-Lck tactctagatacctcgaggccaccATGGACCCCAGATGCACCatgggcttggcaatccttatc (mCD86-mL tttgtgacagtcttgctgatctcagatgctgtttccgtggagacgcaagcttatttcaatggg- actgcatatct ck fusion) gccgtgcccatttacaaaggctcaaaacataagcctgagtgagctggtagtattttggcaggaccagca aaagttggttctgtacgagcactatttgggcacagagaaacttgatagtgtgaatgccaagtacctgggc cgcacgagctttgacaggaacaactggactctacgacttcacaatgttcagatcaaggacatgggctcg tatgattgttttatacaaaaaaagccacccacaggatcaattatcctccaacagacattaacagaactgtc agtgatcgccaacttcagtgaacctgaaataaaactggctcagaatgtaacaggaaattctggcataaa tttgacctgcacgtctaagcaaggtcacccgaaacctaagaagatgtattttctgataactaattcaacta atgagtatggtgataacatgcagatatcacaagataatgtcacagaactgttcagtatctccaacagcct ctctctttcattcccggatggtgtgtggcatatgaccgttgtgtgtgttctggaaacggagtcaatgaagat- tt cctccaaacctctcaatttcactcaagagtttccatctcctcaaacgtattggaaggagattacagcttcag ttactgtggccctcctccttgtgatgctgctcatcattgtatgtcacaagaagccgaatcagcctagcaggc ccagcaacacagcctctaagttagagcgggatagtaacgctgacagagagactatcaacctgaagg aacttgaaccccaaattgcttcagcaaaaccaaatgcagagtgtactagtCACTATCCCATAGT Cccactggacagcaagatctcgctgcccatccggaatggctctgaagtgcgggacccactggtcacct atgagggatctctcccaccagcatccccgctgcaagacaacctggttatcgccctgcacagttatgagc cctcccatgatggagacttgggctttgagaagggtgaacagctccgaatcctggagcagagcggtgag tggtggaaggctcagtccctgacgactggccaagaaggcttcattcccttcaacttcgtggcgaaagca aacagcctggagcctgaaccttggttcttcaagaatctgagccgtaaggacgccgagcggcagcttttg gcgcccgggaacacgcatggatccttcctgatccgggaaagcgaaagcactgcggggtccttttccctg tcggtcagagacttcgaccagaaccagggagaagtggtgaaacattacaagatccgtaacctagaca acggtggcttctacatctcccctcgtatcacttttcccggattgcacgatctagtccgccattacaccaacg- c ctctgatgggctgtgcacaaagttgagccgtccttgccagacccagaagccccagaaaccatggtggg aggacgaatgggaagttcccagggaaacactgaagttggtggagcggctgggagctggccagttcgg ggaagtgtggatggggtactacaacggacacacgaaggtggcggtgaagagtctgaaacaaggga gcatgtcccccgacgccttcctggctgaggctaacctcatgaagcagctgcagcacccgcggctagtcc ggctttatgcagtggtcacccaggaacccatctacatcatcacggaatacatggagaacgggagccta gtagattttctcaagactccctcgggcatcaagttgaatgtcaacaaacttttggacatggcagcccagatt gcagagggcatggcgttcatcgaagaacagaattacatccatcgggacctgcgcgccgccaacatcc tggtgtctgacacgctgagctgcaagattgcagactttggcctggcgcgcctcattgaggacaatgagta cacggcccgggagggggccaaatttcccattaagtggacagcaccagaagccattaactatgggacc ttcaccatcaagtcagacgtgtggtccttcgggatcttgcttacagagatcgtcacccacggtcgaatccct tacccaggaatgaccaaccctgaagtcattcagaacctggagagaggctaccgcatggtgagacctg acaactgtccggaagagctgtaccacctcatgatgctgtgctggaaggagcgcccagaggaccggcc cacgtttgactaccttcggagtgttctggatgacttcttcacagccacagagggcCAGTACCAGCC CCAGCCTggtacctagtgagaattctacatg

[0073] The disclosures of the following U.S. patents are incorporated in their entirety by reference herein: U.S. Pat. Application No. 20140219975; U.S. Pat. Nos. 8,450,112; 7,741,465; 6,319,494; CA 2209300; CA 2104957; EP 0574512; U.S. Pat. Nos. 6,407,221; 6,268,411; U.S. Pat. Application No. 20040258697; EP 1292621; EP 2659893; WO 2011101681; WO 2005054292; EP 1379670; U.S. Pat. Nos. 6,056,952; 6,410,319; 8,524,234; 7,871,817.

[0074] As used herein, the term "about" refers to plus or minus 10% of the referenced number.

[0075] Various modifications of the invention, in addition to those described herein, will be apparent to those skilled in the art from the foregoing description. Such modifications are also intended to fall within the scope of the appended claims. Each reference cited in the present application is incorporated herein by reference in its entirety.

[0076] Although there has been shown and described the preferred embodiment of the present invention, it will be readily apparent to those skilled in the art that modifications may be made thereto which do not exceed the scope of the appended claims. Therefore, the scope of the invention is only to be limited by the following claims. In some embodiments, the figures presented in this patent application are drawn to scale, including the angles, ratios of dimensions, etc. In some embodiments, the figures are representative only and the claims are not limited by the dimensions of the figures. In some embodiments, descriptions of the inventions described herein using the phrase "comprising" includes embodiments that could be described as "consisting of", and as such the written description requirement for claiming one or more embodiments of the present invention using the phrase "consisting of" is met.

Sequence CWU 1

1

391365PRTHomo sapiens 1Met Ala Val Met Ala Pro Arg Thr Leu Val Leu Leu Leu Ser Gly Ala1 5 10 15Leu Ala Leu Thr Gln Thr Trp Ala Gly Ser His Ser Met Arg Tyr Phe 20 25 30Tyr Thr Ser Val Ser Arg Pro Gly Arg Gly Glu Pro Arg Phe Ile Ala 35 40 45Val Gly Tyr Val Asp Asp Thr Gln Phe Val Arg Phe Asp Ser Asp Ala 50 55 60Ala Ser Gln Arg Met Glu Pro Arg Ala Pro Trp Ile Glu Gln Glu Gly65 70 75 80Pro Glu Tyr Trp Asp Arg Asn Thr Arg Asn Val Lys Ala Gln Ser Gln 85 90 95Thr Asp Arg Val Asp Leu Gly Thr Leu Arg Gly Tyr Tyr Asn Gln Ser 100 105 110Glu Ala Gly Ser His Thr Ile Gln Met Met Tyr Gly Cys Asp Val Gly 115 120 125Ser Asp Gly Arg Phe Leu Arg Gly Tyr Arg Gln Asp Ala Tyr Asp Gly 130 135 140Lys Asp Tyr Ile Ala Leu Lys Glu Asp Leu Arg Ser Trp Thr Ala Ala145 150 155 160Asp Met Ala Ala Gln Thr Thr Lys His Lys Trp Glu Ala Ala His Val 165 170 175Ala Glu Gln Trp Arg Ala Tyr Leu Glu Gly Thr Cys Val Glu Trp Leu 180 185 190Arg Arg Tyr Leu Glu Asn Gly Lys Glu Thr Leu Gln Arg Thr Asp Ala 195 200 205Pro Lys Thr His Met Thr His His Ala Val Ser Asp His Glu Ala Thr 210 215 220Leu Arg Cys Trp Ala Leu Ser Phe Tyr Pro Ala Glu Ile Thr Leu Thr225 230 235 240Trp Gln Arg Asp Gly Glu Asp Gln Thr Gln Asp Thr Glu Leu Val Glu 245 250 255Thr Arg Pro Ala Gly Asp Gly Thr Phe Gln Lys Trp Val Ala Val Val 260 265 270Val Pro Ser Gly Gln Glu Gln Arg Tyr Thr Cys His Val Gln His Glu 275 280 285Gly Leu Pro Lys Pro Leu Thr Leu Arg Trp Glu Pro Ser Ser Gln Pro 290 295 300Thr Ile Pro Ile Val Gly Ile Ile Ala Gly Leu Val Leu Phe Gly Ala305 310 315 320Val Ile Thr Gly Ala Val Val Ala Ala Val Met Trp Arg Arg Lys Ser 325 330 335Ser Asp Arg Lys Gly Gly Ser Tyr Ser Gln Ala Ala Ser Ser Asp Ser 340 345 350Ala Gln Gly Ser Asp Val Ser Leu Thr Ala Cys Lys Val 355 360 3652362PRTHomo sapiens 2Met Arg Val Thr Ala Pro Arg Thr Val Leu Leu Leu Leu Trp Gly Ala1 5 10 15Val Ala Leu Thr Glu Thr Trp Ala Gly Ser His Ser Met Arg Tyr Phe 20 25 30Tyr Thr Ala Met Ser Arg Pro Gly Arg Gly Glu Pro Arg Phe Ile Ala 35 40 45Val Gly Tyr Val Asp Asp Thr Gln Phe Val Arg Phe Asp Ser Asp Ala 50 55 60Ala Ser Pro Arg Thr Glu Pro Arg Ala Pro Trp Ile Glu Gln Glu Gly65 70 75 80Pro Glu Tyr Trp Asp Arg Asn Thr Gln Ile Phe Lys Thr Asn Thr Gln 85 90 95Thr Tyr Arg Glu Asn Leu Arg Ile Ala Leu Arg Tyr Tyr Asn Gln Ser 100 105 110Glu Ala Gly Ser His Thr Trp Gln Thr Met Tyr Gly Cys Asp Val Gly 115 120 125Pro Asp Gly Arg Leu Leu Arg Gly His Asn Gln Tyr Ala Tyr Asp Gly 130 135 140Lys Asp Tyr Ile Ala Leu Asn Glu Asp Leu Ser Ser Trp Thr Ala Ala145 150 155 160Asp Thr Ala Ala Gln Ile Thr Gln Arg Lys Trp Glu Ala Ala Arg Glu 165 170 175Ala Glu Gln Leu Arg Ala Tyr Leu Glu Gly Leu Cys Val Glu Trp Leu 180 185 190Arg Arg His Leu Glu Asn Gly Lys Glu Thr Leu Gln Arg Ala Asp Pro 195 200 205Pro Lys Thr His Val Thr His His Pro Val Ser Asp His Glu Ala Thr 210 215 220Leu Arg Cys Trp Ala Leu Gly Phe Tyr Pro Ala Glu Ile Thr Leu Thr225 230 235 240Trp Gln Arg Asp Gly Glu Asp Gln Thr Gln Asp Thr Glu Leu Val Glu 245 250 255Thr Arg Pro Ala Gly Asp Arg Thr Phe Gln Lys Trp Ala Ala Val Val 260 265 270Val Pro Ser Gly Glu Glu Gln Arg Tyr Thr Cys His Val Gln His Glu 275 280 285Gly Leu Pro Lys Pro Leu Thr Leu Arg Trp Glu Pro Ser Ser Gln Ser 290 295 300Thr Ile Pro Ile Val Gly Ile Val Ala Gly Leu Ala Val Leu Ala Val305 310 315 320Val Val Ile Gly Ala Val Val Ala Thr Val Met Cys Arg Arg Lys Ser 325 330 335Ser Gly Gly Lys Gly Gly Ser Tyr Ser Gln Ala Ala Ser Ser Asp Ser 340 345 350Ala Gln Gly Ser Asp Val Ser Leu Thr Ala 355 3603366PRTHomo sapiens 3Met Arg Val Met Ala Pro Arg Thr Leu Ile Leu Leu Leu Ser Gly Ala1 5 10 15Leu Ala Leu Thr Glu Thr Trp Ala Cys Ser His Ser Met Arg Tyr Phe 20 25 30Asp Thr Ala Val Ser Arg Pro Gly Arg Gly Glu Pro Arg Phe Ile Ser 35 40 45Val Gly Tyr Val Asp Asp Thr Gln Phe Val Arg Phe Asp Ser Asp Ala 50 55 60Ala Ser Pro Arg Gly Glu Pro Arg Ala Pro Trp Val Glu Gln Glu Gly65 70 75 80Pro Glu Tyr Trp Asp Arg Glu Thr Gln Lys Tyr Lys Arg Gln Ala Gln 85 90 95Ala Asp Arg Val Asn Leu Arg Lys Leu Arg Gly Tyr Tyr Asn Gln Ser 100 105 110Glu Asp Gly Ser His Thr Leu Gln Trp Met Tyr Gly Cys Asp Leu Gly 115 120 125Pro Asp Gly Arg Leu Leu Arg Gly Tyr Asp Gln Ser Ala Tyr Asp Gly 130 135 140Lys Asp Tyr Ile Ala Leu Asn Glu Asp Leu Arg Ser Trp Thr Ala Ala145 150 155 160Asp Thr Ala Ala Gln Ile Thr Gln Arg Lys Trp Glu Ala Ala Arg Glu 165 170 175Ala Glu Gln Trp Arg Ala Tyr Leu Glu Gly Thr Cys Val Glu Trp Leu 180 185 190Arg Arg Tyr Leu Glu Asn Gly Lys Glu Thr Leu Gln Arg Ala Glu His 195 200 205Pro Lys Thr His Val Thr His His Pro Val Ser Asp His Glu Ala Thr 210 215 220Leu Arg Cys Trp Ala Leu Gly Phe Tyr Pro Ala Glu Ile Thr Leu Thr225 230 235 240Trp Gln Arg Asp Gly Glu Asp Gln Thr Gln Asp Thr Glu Leu Val Glu 245 250 255Thr Arg Pro Ala Gly Asp Gly Thr Phe Gln Lys Trp Ala Ala Val Val 260 265 270Val Pro Ser Gly Glu Glu Gln Arg Tyr Thr Cys His Val Gln His Glu 275 280 285Gly Leu Pro Glu Pro Leu Thr Leu Arg Trp Glu Pro Ser Ser Gln Pro 290 295 300Thr Ile Pro Ile Val Gly Ile Val Ala Gly Leu Ala Val Leu Ala Val305 310 315 320Leu Ala Val Leu Gly Ala Val Met Ala Val Val Met Cys Arg Arg Lys 325 330 335Ser Ser Gly Gly Lys Gly Gly Ser Cys Ser Gln Ala Ala Ser Ser Asn 340 345 350Ser Ala Gln Gly Ser Asp Glu Ser Leu Ile Ala Cys Lys Ala 355 360 3654260PRTHomo sapiens 4Met Arg Pro Glu Asp Arg Met Phe His Ile Arg Ala Val Ile Leu Arg1 5 10 15Ala Leu Ser Leu Ala Phe Leu Leu Ser Leu Arg Gly Ala Gly Ala Ile 20 25 30Lys Ala Asp His Val Ser Thr Tyr Ala Ala Phe Val Gln Thr His Arg 35 40 45Pro Thr Gly Glu Phe Met Phe Glu Phe Asp Glu Asp Glu Met Phe Tyr 50 55 60Val Asp Leu Asp Lys Lys Glu Thr Val Trp His Leu Glu Glu Phe Gly65 70 75 80Gln Ala Phe Ser Phe Glu Ala Gln Gly Gly Leu Ala Asn Ile Ala Ile 85 90 95Leu Asn Asn Asn Leu Asn Thr Leu Ile Gln Arg Ser Asn His Thr Gln 100 105 110Ala Thr Asn Asp Pro Pro Glu Val Thr Val Phe Pro Lys Glu Pro Val 115 120 125Glu Leu Gly Gln Pro Asn Thr Leu Ile Cys His Ile Asp Lys Phe Phe 130 135 140Pro Pro Val Leu Asn Val Thr Trp Leu Cys Asn Gly Glu Leu Val Thr145 150 155 160Glu Gly Val Ala Glu Ser Leu Phe Leu Pro Arg Thr Asp Tyr Ser Phe 165 170 175His Lys Phe His Tyr Leu Thr Phe Val Pro Ser Ala Glu Asp Phe Tyr 180 185 190Asp Cys Arg Val Glu His Trp Gly Leu Asp Gln Pro Leu Leu Lys His 195 200 205Trp Glu Ala Gln Glu Pro Ile Gln Met Pro Glu Thr Thr Glu Thr Val 210 215 220Leu Cys Ala Leu Gly Leu Val Leu Gly Leu Val Gly Ile Ile Val Gly225 230 235 240Thr Val Leu Ile Ile Lys Ser Leu Arg Ser Gly His Asp Pro Arg Ala 245 250 255Gln Gly Thr Leu 2605258PRTHomo sapiens 5Met Met Val Leu Gln Val Ser Ala Ala Pro Arg Thr Val Ala Leu Thr1 5 10 15Ala Leu Leu Met Val Leu Leu Thr Ser Val Val Gln Gly Arg Ala Thr 20 25 30Pro Glu Asn Tyr Leu Phe Gln Gly Arg Gln Glu Cys Tyr Ala Phe Asn 35 40 45Gly Thr Gln Arg Phe Leu Glu Arg Tyr Ile Tyr Asn Arg Glu Glu Phe 50 55 60Ala Arg Phe Asp Ser Asp Val Gly Glu Phe Arg Ala Val Thr Glu Leu65 70 75 80Gly Arg Pro Ala Ala Glu Tyr Trp Asn Ser Gln Lys Asp Ile Leu Glu 85 90 95Glu Lys Arg Ala Val Pro Asp Arg Met Cys Arg His Asn Tyr Glu Leu 100 105 110Gly Gly Pro Met Thr Leu Gln Arg Arg Val Gln Pro Arg Val Asn Val 115 120 125Ser Pro Ser Lys Lys Gly Pro Leu Gln His His Asn Leu Leu Val Cys 130 135 140His Val Thr Asp Phe Tyr Pro Gly Ser Ile Gln Val Arg Trp Phe Leu145 150 155 160Asn Gly Gln Glu Glu Thr Ala Gly Val Val Ser Thr Asn Leu Ile Arg 165 170 175Asn Gly Asp Trp Thr Phe Gln Ile Leu Val Met Leu Glu Met Thr Pro 180 185 190Gln Gln Gly Asp Val Tyr Thr Cys Gln Val Glu His Thr Ser Leu Asp 195 200 205Ser Pro Val Thr Val Glu Trp Lys Ala Gln Ser Asp Ser Ala Arg Ser 210 215 220Lys Thr Leu Thr Gly Ala Gly Gly Phe Val Leu Gly Leu Ile Ile Cys225 230 235 240Gly Val Gly Ile Phe Met His Arg Arg Ser Lys Lys Val Gln Arg Gly 245 250 255Ser Ala6254PRTHomo sapiens 6Met Ile Leu Asn Lys Ala Leu Met Leu Gly Ala Leu Ala Leu Thr Thr1 5 10 15Val Met Ser Pro Cys Gly Gly Glu Asp Ile Val Ala Asp His Val Ala 20 25 30Ser Tyr Gly Val Asn Leu Tyr Gln Ser Tyr Gly Pro Ser Gly Gln Tyr 35 40 45Thr His Glu Phe Asp Gly Asp Glu Gln Phe Tyr Val Asp Leu Gly Arg 50 55 60Lys Glu Thr Val Trp Cys Leu Pro Val Leu Arg Gln Phe Arg Phe Asp65 70 75 80Pro Gln Phe Ala Leu Thr Asn Ile Ala Val Leu Lys His Asn Leu Asn 85 90 95Ser Leu Ile Lys Arg Ser Asn Ser Thr Ala Ala Thr Asn Glu Val Pro 100 105 110Glu Val Thr Val Phe Ser Lys Ser Pro Val Thr Leu Gly Gln Pro Asn 115 120 125Ile Leu Ile Cys Leu Val Asp Asn Ile Phe Pro Pro Val Val Asn Ile 130 135 140Thr Trp Leu Ser Asn Gly His Ser Val Thr Glu Gly Val Ser Glu Thr145 150 155 160Ser Phe Leu Ser Lys Ser Asp His Ser Phe Phe Lys Ile Ser Tyr Leu 165 170 175Thr Leu Leu Pro Ser Ala Glu Glu Ser Tyr Asp Cys Lys Val Glu His 180 185 190Trp Gly Leu Asp Lys Pro Leu Leu Lys His Trp Glu Pro Glu Ile Pro 195 200 205Ala Pro Met Ser Glu Leu Thr Glu Thr Val Val Cys Ala Leu Gly Leu 210 215 220Ser Val Gly Leu Val Gly Ile Val Val Gly Thr Val Phe Ile Ile Arg225 230 235 240Gly Leu Arg Ser Val Gly Ala Ser Arg His Gln Gly Pro Leu 245 2507261PRTHomo sapiens 7Met Ser Trp Lys Lys Ala Leu Arg Ile Pro Gly Gly Leu Arg Ala Ala1 5 10 15Thr Val Thr Leu Met Leu Ala Met Leu Ser Thr Pro Val Ala Glu Gly 20 25 30Arg Asp Ser Pro Glu Asp Phe Val Tyr Gln Phe Lys Ala Met Cys Tyr 35 40 45Phe Thr Asn Gly Thr Glu Arg Val Arg Tyr Val Thr Arg Tyr Ile Tyr 50 55 60Asn Arg Glu Glu Tyr Ala Arg Phe Asp Ser Asp Val Glu Val Tyr Arg65 70 75 80Ala Val Thr Pro Leu Gly Pro Pro Asp Ala Glu Tyr Trp Asn Ser Gln 85 90 95Lys Glu Val Leu Glu Arg Thr Arg Ala Glu Leu Asp Thr Val Cys Arg 100 105 110His Asn Tyr Gln Leu Glu Leu Arg Thr Thr Leu Gln Arg Arg Val Glu 115 120 125Pro Thr Val Thr Ile Ser Pro Ser Arg Thr Glu Ala Leu Asn His His 130 135 140Asn Leu Leu Val Cys Ser Val Thr Asp Phe Tyr Pro Ala Gln Ile Lys145 150 155 160Val Arg Trp Phe Arg Asn Asp Gln Glu Glu Thr Thr Gly Val Val Ser 165 170 175Thr Pro Leu Ile Arg Asn Gly Asp Trp Thr Phe Gln Ile Leu Val Met 180 185 190Leu Glu Met Thr Pro Gln His Gly Asp Val Tyr Thr Cys His Val Glu 195 200 205His Pro Ser Leu Gln Asn Pro Ile Thr Val Glu Trp Arg Ala Gln Ser 210 215 220Glu Ser Ala Gln Ser Lys Met Leu Ser Gly Ile Gly Gly Phe Val Leu225 230 235 240Gly Leu Ile Phe Leu Gly Leu Gly Leu Ile Ile His His Arg Ser Gln 245 250 255Lys Gly Leu Leu His 2608254PRTHomo sapiens 8Met Ala Ile Ser Gly Val Pro Val Leu Gly Phe Phe Ile Ile Ala Val1 5 10 15Leu Met Ser Ala Gln Glu Ser Trp Ala Ile Lys Glu Glu His Val Ile 20 25 30Ile Gln Ala Glu Phe Tyr Leu Asn Pro Asp Gln Ser Gly Glu Phe Met 35 40 45Phe Asp Phe Asp Gly Asp Glu Ile Phe His Val Asp Met Ala Lys Lys 50 55 60Glu Thr Val Trp Arg Leu Glu Glu Phe Gly Arg Phe Ala Ser Phe Glu65 70 75 80Ala Gln Gly Ala Leu Ala Asn Ile Ala Val Asp Lys Ala Asn Leu Glu 85 90 95Ile Met Thr Lys Arg Ser Asn Tyr Thr Pro Ile Thr Asn Val Pro Pro 100 105 110Glu Val Thr Val Leu Thr Asn Ser Pro Val Glu Leu Arg Glu Pro Asn 115 120 125Val Leu Ile Cys Phe Ile Asp Lys Phe Thr Pro Pro Val Val Asn Val 130 135 140Thr Trp Leu Arg Asn Gly Lys Pro Val Thr Thr Gly Val Ser Glu Thr145 150 155 160Val Phe Leu Pro Arg Glu Asp His Leu Phe Arg Lys Phe His Tyr Leu 165 170 175Pro Phe Leu Pro Ser Thr Glu Asp Val Tyr Asp Cys Arg Val Glu His 180 185 190Trp Gly Leu Asp Glu Pro Leu Leu Lys His Trp Glu Phe Asp Ala Pro 195 200 205Ser Pro Leu Pro Glu Thr Thr Glu Asn Val Val Cys Ala Leu Gly Leu 210 215 220Thr Val Gly Leu Val Gly Ile Ile Ile Gly Thr Ile Phe Ile Ile Lys225 230 235 240Gly Val Arg Lys Ser Asn Ala Ala Glu Arg Arg Gly Pro Leu 245 2509266PRTHomo sapiens 9Met Val Cys Leu Arg Leu Pro Gly Gly Ser Cys Met Ala Val Leu Thr1 5 10 15Val Thr Leu Met Val Leu Ser Ser Pro Leu Ala Leu Ala Gly Asp Thr 20 25 30Arg Pro Arg Phe Leu Glu Glu Val Lys Phe Glu Cys His Phe Phe Asn 35 40 45Gly Thr Glu Arg Val Arg Leu Leu Glu Arg Arg Val His Asn Gln Glu 50 55 60Glu Tyr Ala Arg Tyr Asp Ser Asp Val Gly Glu Tyr Arg Ala Val Thr65 70

75 80Glu Leu Gly Arg Pro Asp Ala Glu Tyr Trp Asn Ser Gln Lys Asp Leu 85 90 95Leu Glu Arg Arg Arg Ala Ala Val Asp Thr Tyr Cys Arg His Asn Tyr 100 105 110Gly Val Gly Glu Ser Phe Thr Val Gln Arg Arg Val Gln Pro Lys Val 115 120 125Thr Val Tyr Pro Ser Lys Thr Gln Pro Leu Gln His His Asn Leu Leu 130 135 140Val Cys Ser Val Asn Gly Phe Tyr Pro Gly Ser Ile Glu Val Arg Trp145 150 155 160Phe Arg Asn Gly Gln Glu Glu Lys Thr Gly Val Val Ser Thr Gly Leu 165 170 175Ile Gln Asn Gly Asp Trp Thr Phe Gln Thr Leu Val Met Leu Glu Thr 180 185 190Val Pro Gln Ser Gly Glu Val Tyr Thr Cys Gln Val Glu His Pro Ser 195 200 205Val Met Ser Pro Leu Thr Val Glu Trp Arg Ala Arg Ser Glu Ser Ala 210 215 220Gln Ser Lys Met Leu Ser Gly Val Gly Gly Phe Val Leu Gly Leu Leu225 230 235 240Phe Leu Gly Ala Gly Leu Phe Ile Tyr Phe Arg Asn Gln Lys Gly His 245 250 255Ser Gly Leu Pro Pro Thr Gly Phe Leu Ser 260 26510250PRTMus musculus 10Arg Ser Arg Ala Leu Ile Leu Gly Val Leu Ala Leu Thr Thr Met Leu1 5 10 15Ser Leu Cys Gly Gly Glu Asp Tyr Ile Glu Ala Asp His Val Ala Phe 20 25 30Tyr Gly Ile Ser Val Tyr Gln Ser Pro Gly Asp Ile Gly Gln Tyr Thr 35 40 45Phe Glu Phe Asp Gly Asp Glu Leu Phe Tyr Val Asp Leu Asp Lys Lys 50 55 60Glu Thr Val Trp Met Leu Pro Glu Phe Gly Gln Leu Thr Ser Phe Asp65 70 75 80Pro Gln Gly Gly Leu Gln Glu Ile Ala Thr Gly Lys Tyr Asn Leu Glu 85 90 95Ile Leu Ile Lys Asp Ser Asn Phe Thr Pro Ala Ala Asn Glu Ala Pro 100 105 110Gln Ala Thr Val Phe Pro Lys Ser Pro Val Leu Leu Gly Gln Pro Asn 115 120 125Thr Leu Ile Cys Phe Val Asp Asn Ile Phe Pro Pro Val Ile Asn Ile 130 135 140Thr Trp Leu Arg Asn Ser Lys Ser Val Thr Asp Gly Val Tyr Glu Thr145 150 155 160Ser Phe Leu Val Asn Arg Asp His Ser Phe His Lys Leu Ser Tyr Leu 165 170 175Thr Phe Ile Pro Ser Asp Asp Asp Ile Tyr Asp Cys Lys Val Glu His 180 185 190Trp Gly Leu Glu Glu Pro Val Leu Lys His Trp Glu Pro Glu Ile Pro 195 200 205Ala Pro Met Ser Glu Leu Thr Glu Thr Val Ile Cys Ala Leu Gly Leu 210 215 220Ser Val Gly Leu Val Gly Ile Val Val Gly Thr Ile Phe Ile Ile Gln225 230 235 240Gly Leu Arg Ser Gly Gly Thr Ser Arg His 245 25011349PRTMus musculus 11Met Ala Gln Arg Thr Leu Phe Leu Leu Leu Ala Ala Ala Leu Thr Met1 5 10 15Ile Glu Thr Arg Ala Gly Pro His Ser Met Arg Tyr Phe Glu Thr Ala 20 25 30Val Phe Arg Pro Gly Leu Gly Glu Pro Arg Phe Ile Ser Val Gly Tyr 35 40 45Val Asp Asn Thr Gln Phe Val Ser Phe Asp Ser Asp Ala Glu Asn Pro 50 55 60Arg Ser Glu Pro Arg Ala Pro Trp Met Glu Gln Glu Gly Pro Glu Tyr65 70 75 80Trp Glu Arg Glu Thr Gln Ile Ala Lys Asp Asn Glu Gln Ser Phe Gly 85 90 95Trp Ser Leu Arg Asn Leu Ile His Tyr Tyr Asn Gln Ser Lys Gly Gly 100 105 110Phe His Thr Phe Gln Arg Leu Ser Gly Cys Asp Met Gly Leu Asp Gly 115 120 125Arg Leu Leu Arg Gly Tyr Leu Gln Phe Ala Tyr Asp Gly Arg Asp Tyr 130 135 140Ile Thr Leu Asn Glu Asp Leu Lys Thr Trp Met Ala Ala Asp Leu Val145 150 155 160Ala Leu Ile Thr Arg Arg Lys Trp Glu Gln Ala Gly Ala Ala Glu Leu 165 170 175Tyr Lys Phe Tyr Leu Glu Gly Glu Cys Val Glu Trp Leu Arg Arg Tyr 180 185 190Leu Glu Leu Gly Asn Glu Thr Leu Leu Arg Thr Asp Pro Pro Lys Ala 195 200 205His Val Thr His His Pro Arg Pro Ala Gly Asp Val Thr Leu Arg Cys 210 215 220Trp Ala Leu Gly Phe Tyr Pro Ala Asp Ile Thr Leu Thr Trp Gln Leu225 230 235 240Asn Gly Glu Glu Leu Thr Gln Asp Met Glu Leu Val Glu Thr Arg Pro 245 250 255Ala Gly Asp Gly Thr Phe Gln Lys Trp Ala Ala Val Val Val Pro Leu 260 265 270Gly Lys Glu Gln Asn Tyr Thr Cys His Val Tyr His Glu Gly Leu Pro 275 280 285Glu Pro Leu Thr Leu Arg Trp Glu Pro Pro Pro Ser Thr Gly Ser Asn 290 295 300Met Val Asn Ile Ala Val Leu Val Val Leu Gly Ala Val Ile Ile Ile305 310 315 320Glu Ala Met Val Ala Phe Val Leu Lys Ser Ser Arg Lys Ile Ala Ile 325 330 335Leu Pro Gly Pro Ala Gly Thr Lys Gly Ser Ser Ala Ser 340 34512350PRTMus musculus 12Met Ala Pro Cys Thr Leu Leu Leu Leu Leu Ala Ala Ala Leu Ala Pro1 5 10 15Thr Gln Thr Arg Ala Ala Arg Ala Ala Ala Arg Gly Pro Val Arg Arg 20 25 30Ser Gly Ser His Arg Ala Pro Pro Pro Gly Pro His Ser Leu Ser Asp 35 40 45Ala Asp Asn Pro Arg Phe Glu Pro Arg Ala Pro Trp Met Glu Gln Glu 50 55 60Gly Pro Glu Tyr Trp Glu Glu Gln Thr Gln Arg Ala Lys Ser Asp Glu65 70 75 80Gln Trp Phe Arg Val Ser Leu Arg Thr Ala Gln Arg Tyr Tyr Asn Gln 85 90 95Ser Lys Gly Gly Ser His Thr Phe Gln Arg Met Phe Gly Cys Asp Val 100 105 110Gly Ser Asp Trp Arg Leu Leu Arg Gly Tyr Gln Gln Phe Ala Tyr Asp 115 120 125Gly Arg Asp Tyr Ile Ala Leu Asn Glu Asp Leu Lys Thr Trp Thr Ala 130 135 140Ala Asp Thr Ala Ala Leu Ile Thr Arg Arg Lys Trp Glu Gln Ala Gly145 150 155 160Asp Ala Glu Tyr Tyr Arg Ala Tyr Leu Glu Gly Glu Cys Val Glu Trp 165 170 175Leu Arg Arg Tyr Leu Glu Leu Gly Asn Glu Thr Leu Leu Arg Thr Asp 180 185 190Ser Pro Lys Ala His Val Thr Tyr His Pro Arg Ser Gln Val Asp Val 195 200 205Thr Leu Arg Cys Trp Ala Leu Gly Phe Tyr Pro Ala Asp Ile Thr Leu 210 215 220Thr Trp Gln Leu Asn Gly Glu Asp Leu Thr Gln Asp Met Glu Leu Val225 230 235 240Glu Thr Arg Pro Ala Gly Asp Gly Thr Phe Gln Lys Trp Ala Ala Val 245 250 255Val Val Pro Leu Gly Lys Glu Gln Asn Tyr Thr Cys His Val His His 260 265 270Lys Gly Leu Pro Glu Pro Leu Thr Leu Arg Trp Lys Leu Pro Pro Pro 275 280 285Thr Val Ser Asn Thr Val Ile Ile Ala Val Leu Val Val Leu Gly Ala 290 295 300Ala Ile Val Thr Gly Ala Val Val Ala Phe Val Met Lys Met Arg Arg305 310 315 320Asn Thr Gly Gly Lys Gly Val Asn Tyr Ala Leu Ala Pro Gly Ser Gln 325 330 335Thr Ser Asp Leu Ser Leu Pro Asp Gly Lys Val Met Val His 340 345 35013264PRTMus musculus 13Met Val Trp Leu Pro Arg Val Pro Cys Val Ala Ala Val Ile Leu Leu1 5 10 15Leu Thr Val Leu Ser Pro Pro Met Ala Leu Val Arg Asp Ser Arg Pro 20 25 30Trp Phe Leu Glu Tyr Cys Lys Ser Glu Cys His Phe Tyr Asn Gly Thr 35 40 45Gln Arg Val Arg Leu Leu Glu Arg Tyr Phe Tyr Asn Leu Glu Glu Asn 50 55 60Leu Arg Phe Asp Ser Asp Val Gly Glu Phe His Ala Val Thr Glu Leu65 70 75 80Gly Arg Pro Asp Ala Glu Asn Trp Asn Ser Gln Pro Glu Phe Leu Glu 85 90 95Gln Lys Arg Ala Glu Val Asp Thr Val Cys Arg His Asn Tyr Glu Ile 100 105 110Ser Asp Lys Phe Leu Val Arg Arg Arg Val Glu Pro Thr Val Thr Val 115 120 125Tyr Pro Thr Lys Thr Gln Pro Leu Glu His His Asn Leu Leu Val Cys 130 135 140Ser Val Ser Asp Phe Tyr Pro Gly Asn Ile Glu Val Arg Trp Phe Arg145 150 155 160Asn Gly Lys Glu Glu Lys Thr Gly Ile Val Ser Thr Gly Leu Val Arg 165 170 175Asn Gly Asp Trp Thr Phe Gln Thr Leu Val Met Leu Glu Thr Val Pro 180 185 190Gln Ser Gly Glu Val Tyr Thr Cys Gln Val Glu His Pro Ser Leu Thr 195 200 205Asp Pro Val Thr Val Glu Trp Lys Ala Gln Ser Thr Ser Ala Gln Asn 210 215 220Lys Met Leu Ser Gly Val Gly Gly Phe Val Leu Gly Leu Leu Phe Leu225 230 235 240Gly Ala Gly Leu Phe Ile Tyr Phe Arg Asn Gln Lys Gly Gln Ser Gly 245 250 255Leu Gln Pro Thr Gly Leu Leu Ser 26014255PRTMus musculus 14Met Ala Thr Ile Gly Ala Leu Val Leu Arg Phe Phe Phe Ile Ala Val1 5 10 15Leu Met Ser Ser Gln Lys Ser Trp Ala Ile Lys Glu Glu His Thr Ile 20 25 30Ile Gln Ala Glu Phe Tyr Leu Leu Pro Asp Lys Arg Gly Glu Phe Met 35 40 45Phe Asp Phe Asp Gly Asp Glu Ile Phe His Val Asp Ile Glu Lys Ser 50 55 60Glu Thr Ile Trp Arg Leu Glu Glu Phe Ala Lys Phe Ala Ser Phe Glu65 70 75 80Ala Gln Gly Ala Leu Ala Asn Ile Ala Val Asp Lys Ala Asn Leu Asp 85 90 95Val Met Lys Glu Arg Ser Asn Asn Thr Pro Asp Ala Asn Val Ala Pro 100 105 110Glu Val Thr Val Leu Ser Arg Ser Pro Val Asn Leu Gly Glu Pro Asn 115 120 125Ile Leu Ile Cys Phe Ile Asp Lys Phe Ser Pro Pro Val Val Asn Val 130 135 140Thr Trp Leu Arg Asn Gly Arg Pro Val Thr Glu Gly Val Ser Glu Thr145 150 155 160Val Phe Leu Pro Arg Asp Asp His Leu Phe Arg Lys Phe His Tyr Leu 165 170 175Thr Phe Leu Pro Ser Thr Asp Asp Phe Tyr Asp Cys Glu Val Asp His 180 185 190Trp Gly Leu Glu Glu Pro Leu Arg Lys His Trp Glu Phe Glu Glu Lys 195 200 205Thr Leu Leu Pro Glu Thr Lys Glu Asn Val Val Cys Ala Leu Gly Leu 210 215 220Phe Val Gly Leu Val Gly Ile Val Val Gly Ile Ile Leu Ile Met Lys225 230 235 240Gly Ile Lys Lys Arg Asn Val Val Glu Arg Arg Gln Gly Ala Leu 245 250 25515263PRTMus musculus 15Met Trp Leu Pro Arg Val Pro Cys Val Ala Ala Val Ile Leu Leu Leu1 5 10 15Thr Val Leu Ser Pro Pro Val Ala Leu Val Arg Asp Ser Arg Pro Trp 20 25 30Phe Leu Glu Tyr Cys Lys Ser Glu Cys His Phe Tyr Asn Gly Thr Gln 35 40 45Arg Val Arg Leu Leu Val Arg Tyr Phe Tyr Asn Leu Glu Glu Asn Leu 50 55 60Arg Phe Asp Ser Asp Val Gly Glu Phe Arg Ala Val Thr Glu Leu Gly65 70 75 80Arg Pro Asp Ala Glu Asn Trp Asn Ser Gln Pro Glu Phe Leu Glu Gln 85 90 95Lys Arg Ala Glu Val Asp Thr Val Cys Arg His Asn Tyr Glu Ile Phe 100 105 110Asp Asn Phe Leu Val Pro Arg Arg Val Glu Pro Thr Val Thr Val Tyr 115 120 125Pro Thr Lys Thr Gln Pro Leu Glu His His Asn Leu Leu Val Cys Ser 130 135 140Val Ser Asp Phe Tyr Pro Gly Asn Ile Glu Val Arg Trp Phe Arg Asn145 150 155 160Gly Lys Glu Glu Lys Thr Gly Ile Val Ser Thr Gly Leu Val Arg Asn 165 170 175Gly Asp Trp Thr Phe Gln Thr Leu Val Met Leu Glu Thr Val Pro Gln 180 185 190Ser Gly Glu Val Tyr Thr Cys Gln Val Glu His Pro Ser Leu Thr Asp 195 200 205Pro Val Thr Val Glu Trp Lys Ala Gln Ser Thr Ser Ala Gln Asn Lys 210 215 220Met Leu Ser Gly Val Gly Gly Phe Val Leu Gly Leu Leu Phe Leu Gly225 230 235 240Ala Gly Leu Phe Ile Tyr Phe Arg Asn Gln Lys Gly Gln Ser Gly Leu 245 250 255Gln Pro Thr Gly Leu Leu Ser 26016142PRTHomo sapiens 16Pro Asn Ile Gln Asn Pro Asp Pro Ala Val Tyr Gln Leu Arg Asp Ser1 5 10 15Lys Ser Ser Asp Lys Ser Val Cys Leu Phe Thr Asp Phe Asp Ser Gln 20 25 30Thr Asn Val Ser Gln Ser Lys Asp Ser Asp Val Tyr Ile Thr Asp Lys 35 40 45Thr Val Leu Asp Met Arg Ser Met Asp Phe Lys Ser Asn Ser Ala Val 50 55 60Ala Trp Ser Asn Lys Ser Asp Phe Ala Cys Ala Asn Ala Phe Asn Asn65 70 75 80Ser Ile Ile Pro Glu Asp Thr Phe Phe Pro Ser Pro Glu Ser Ser Cys 85 90 95Asp Val Lys Leu Val Glu Lys Ser Phe Glu Thr Asp Thr Asn Leu Asn 100 105 110Phe Gln Asn Leu Ser Val Ile Gly Phe Arg Ile Leu Leu Leu Lys Val 115 120 125Ala Gly Phe Asn Leu Leu Met Thr Leu Arg Leu Trp Ser Ser 130 135 14017177PRTHomo sapiens 17Glu Asp Leu Asn Lys Val Phe Pro Pro Glu Val Ala Val Phe Glu Pro1 5 10 15Ser Glu Ala Glu Ile Ser His Thr Gln Lys Ala Thr Leu Val Cys Leu 20 25 30Ala Thr Gly Phe Phe Pro Asp His Val Glu Leu Ser Trp Trp Val Asn 35 40 45Gly Lys Glu Val His Ser Gly Val Ser Thr Asp Pro Gln Pro Leu Lys 50 55 60Glu Gln Pro Ala Leu Asn Asp Ser Arg Tyr Cys Leu Ser Ser Arg Leu65 70 75 80Arg Val Ser Ala Thr Phe Trp Gln Asn Pro Arg Asn His Phe Arg Cys 85 90 95Gln Val Gln Phe Tyr Gly Leu Ser Glu Asn Asp Glu Trp Thr Gln Asp 100 105 110Arg Ala Lys Pro Val Thr Gln Ile Val Ser Ala Glu Ala Trp Gly Arg 115 120 125Ala Asp Cys Gly Phe Thr Ser Val Ser Tyr Gln Gln Gly Val Leu Ser 130 135 140Ala Thr Ile Leu Tyr Glu Ile Leu Leu Gly Lys Ala Thr Leu Tyr Ala145 150 155 160Val Leu Val Ser Ala Leu Val Leu Met Ala Met Val Lys Arg Lys Asp 165 170 175Phe18178PRTHomo sapiens 18Asp Leu Lys Asn Val Phe Pro Pro Glu Val Ala Val Phe Glu Pro Ser1 5 10 15Glu Ala Glu Ile Ser His Thr Gln Lys Ala Thr Leu Val Cys Leu Ala 20 25 30Thr Gly Phe Tyr Pro Asp His Val Glu Leu Ser Trp Trp Val Asn Gly 35 40 45Lys Glu Val His Ser Gly Val Ser Thr Asp Pro Gln Pro Leu Lys Glu 50 55 60Gln Pro Ala Leu Asn Asp Ser Arg Tyr Cys Leu Ser Ser Arg Leu Arg65 70 75 80Val Ser Ala Thr Phe Trp Gln Asn Pro Arg Asn His Phe Arg Cys Gln 85 90 95Val Gln Phe Tyr Gly Leu Ser Glu Asn Asp Glu Trp Thr Gln Asp Arg 100 105 110Ala Lys Pro Val Thr Gln Ile Val Ser Ala Glu Ala Trp Gly Arg Ala 115 120 125Asp Cys Gly Phe Thr Ser Glu Ser Tyr Gln Gln Gly Val Leu Ser Ala 130 135 140Thr Ile Leu Tyr Glu Ile Leu Leu Gly Lys Ala Thr Leu Tyr Ala Val145 150 155 160Leu Val Ser Ala Leu Val Leu Met Ala Met Val Lys Arg Lys Asp Ser 165 170 175Arg Gly19153PRTHomo sapiens 19Ser Gln Pro His Thr Lys Pro Ser Val Phe Val Met Lys Asn Gly Thr1 5 10 15Asn Val Ala Cys Leu Val Lys Glu Phe Tyr Pro Lys Asp Ile Arg Ile

20 25 30Asn Leu Val Ser Ser Lys Lys Ile Thr Glu Phe Asp Pro Ala Ile Val 35 40 45Ile Ser Pro Ser Gly Lys Tyr Asn Ala Val Lys Leu Gly Lys Tyr Glu 50 55 60Asp Ser Asn Ser Val Thr Cys Ser Val Gln His Asp Asn Lys Thr Val65 70 75 80His Ser Thr Asp Phe Glu Val Lys Thr Asp Ser Thr Asp His Val Lys 85 90 95Pro Lys Glu Thr Glu Asn Thr Lys Gln Pro Ser Lys Ser Cys His Lys 100 105 110Pro Lys Ala Ile Val His Thr Glu Lys Val Asn Met Met Ser Leu Thr 115 120 125Val Leu Gly Leu Arg Met Leu Phe Ala Lys Thr Val Ala Val Asn Phe 130 135 140Leu Leu Thr Ala Lys Leu Phe Phe Leu145 15020173PRTHomo sapiens 20Asp Lys Gln Leu Asp Ala Asp Val Ser Pro Lys Pro Thr Ile Phe Leu1 5 10 15Pro Ser Ile Ala Glu Thr Lys Leu Gln Lys Ala Gly Thr Tyr Leu Cys 20 25 30Leu Leu Glu Lys Phe Phe Pro Asp Val Ile Lys Ile His Trp Gln Glu 35 40 45Lys Lys Ser Asn Thr Ile Leu Gly Ser Gln Glu Gly Asn Thr Met Lys 50 55 60Thr Asn Asp Thr Tyr Met Lys Phe Ser Trp Leu Thr Val Pro Glu Lys65 70 75 80Ser Leu Asp Lys Glu His Arg Cys Ile Val Arg His Glu Asn Asn Lys 85 90 95Asn Gly Val Asp Gln Glu Ile Ile Phe Pro Pro Ile Lys Thr Asp Val 100 105 110Ile Thr Met Asp Pro Lys Asp Asn Cys Ser Lys Asp Ala Asn Asp Thr 115 120 125Leu Leu Leu Gln Leu Thr Asn Thr Ser Ala Tyr Tyr Met Tyr Leu Leu 130 135 140Leu Leu Leu Lys Ser Val Val Tyr Phe Ala Ile Ile Thr Cys Cys Leu145 150 155 160Leu Arg Arg Thr Ala Phe Cys Cys Asn Gly Glu Lys Ser 165 17021189PRTHomo sapiens 21Asp Lys Gln Leu Asp Ala Asp Val Ser Pro Lys Pro Thr Ile Phe Leu1 5 10 15Pro Ser Ile Ala Glu Thr Lys Leu Gln Lys Ala Gly Thr Tyr Leu Cys 20 25 30Leu Leu Glu Lys Phe Phe Pro Asp Ile Ile Lys Ile His Trp Gln Glu 35 40 45Lys Lys Ser Asn Thr Ile Leu Gly Ser Gln Glu Gly Asn Thr Met Lys 50 55 60Thr Asn Asp Thr Tyr Met Lys Phe Ser Trp Leu Thr Val Pro Glu Glu65 70 75 80Ser Leu Asp Lys Glu His Arg Cys Ile Val Arg His Glu Asn Asn Lys 85 90 95Asn Gly Ile Asp Gln Glu Ile Ile Phe Pro Pro Ile Lys Thr Asp Val 100 105 110Thr Thr Val Asp Pro Lys Asp Ser Tyr Ser Lys Asp Ala Asn Asp Val 115 120 125Ile Thr Met Asp Pro Lys Asp Asn Trp Ser Lys Asp Ala Asn Asp Thr 130 135 140Leu Leu Leu Gln Leu Thr Asn Thr Ser Ala Tyr Tyr Met Tyr Leu Leu145 150 155 160Leu Leu Leu Lys Ser Val Val Tyr Phe Ala Ile Ile Thr Cys Cys Leu 165 170 175Leu Gly Arg Thr Ala Phe Cys Cys Asn Gly Glu Lys Ser 180 18522138PRTMus musculus 22Pro Tyr Ile Gln Asn Pro Glu Pro Ala Val Tyr Gln Leu Lys Asp Pro1 5 10 15Arg Ser Gln Asp Ser Thr Leu Cys Leu Phe Thr Asp Phe Asp Ser Gln 20 25 30Ile Asn Val Pro Lys Thr Met Glu Ser Gly Thr Phe Ile Thr Asp Lys 35 40 45Thr Val Leu Asp Met Lys Ala Met Asp Ser Lys Ser Asn Gly Ala Ile 50 55 60Ala Trp Ser Asn Gln Thr Ser Phe Thr Cys Gln Asp Ile Phe Lys Glu65 70 75 80Thr Asn Ala Thr Tyr Pro Ser Ser Asp Val Pro Cys Asp Ala Thr Leu 85 90 95Thr Glu Lys Ser Phe Glu Thr Asp Met Asn Leu Asn Phe Gln Asn Leu 100 105 110Ser Val Met Gly Leu Arg Ile Leu Leu Leu Lys Val Ala Gly Phe Asn 115 120 125Leu Leu Met Thr Leu Arg Leu Trp Ser Ser 130 13523173PRTMus musculus 23Glu Asp Leu Arg Asn Val Thr Pro Pro Lys Val Ser Leu Phe Glu Pro1 5 10 15Ser Lys Ala Glu Ile Ala Asn Lys Gln Lys Ala Thr Leu Val Cys Leu 20 25 30Ala Arg Gly Phe Phe Pro Asp His Val Glu Leu Ser Trp Trp Val Asn 35 40 45Gly Lys Glu Val His Ser Gly Val Ser Thr Asp Pro Gln Ala Tyr Lys 50 55 60Glu Ser Asn Tyr Ser Tyr Cys Leu Ser Ser Arg Leu Arg Val Ser Ala65 70 75 80Thr Phe Trp His Asn Pro Arg Asn His Phe Arg Cys Gln Val Gln Phe 85 90 95His Gly Leu Ser Glu Glu Asp Lys Trp Pro Glu Gly Ser Pro Lys Pro 100 105 110Val Thr Gln Asn Ile Ser Ala Glu Ala Trp Gly Arg Ala Asp Cys Gly 115 120 125Ile Thr Ser Ala Ser Tyr Gln Gln Gly Val Leu Ser Ala Thr Ile Leu 130 135 140Tyr Glu Ile Leu Leu Gly Lys Ala Thr Leu Tyr Ala Val Leu Val Ser145 150 155 160Thr Leu Val Val Met Ala Met Val Lys Arg Lys Asn Ser 165 17024173PRTMus musculus 24Glu Asp Leu Arg Asn Val Thr Pro Pro Lys Val Ser Leu Phe Glu Pro1 5 10 15Ser Lys Ala Glu Ile Ala Asn Lys Gln Lys Ala Thr Leu Val Cys Leu 20 25 30Ala Arg Gly Phe Phe Pro Asp His Val Glu Leu Ser Trp Trp Val Asn 35 40 45Gly Lys Glu Val His Ser Gly Val Ser Thr Asp Pro Gln Ala Tyr Lys 50 55 60Glu Ser Asn Tyr Ser Tyr Cys Leu Ser Ser Arg Leu Arg Val Ser Ala65 70 75 80Thr Phe Trp His Asn Pro Arg Asn His Phe Arg Cys Gln Val Gln Phe 85 90 95His Gly Leu Ser Glu Glu Asp Lys Trp Pro Glu Gly Ser Pro Lys Pro 100 105 110Val Thr Gln Asn Ile Ser Ala Glu Ala Trp Gly Arg Ala Asp Cys Gly 115 120 125Ile Thr Ser Ala Ser Tyr His Gln Gly Val Leu Ser Ala Thr Ile Leu 130 135 140Tyr Glu Ile Leu Leu Gly Lys Ala Thr Leu Tyr Ala Val Leu Val Ser145 150 155 160Gly Leu Val Leu Met Ala Met Val Lys Lys Lys Asn Ser 165 17025167PRTMus musculus 25Asp Lys Arg Leu Asp Ala Asp Ile Ser Pro Lys Pro Thr Ile Phe Leu1 5 10 15Pro Ser Val Ala Glu Thr Asn Leu His Lys Thr Gly Thr Tyr Leu Cys 20 25 30Leu Leu Glu Lys Phe Phe Pro Asp Val Ile Arg Val Tyr Trp Lys Glu 35 40 45Lys Asn Gly Asn Thr Ile Leu Asp Ser Gln Glu Gly Asp Thr Leu Lys 50 55 60Thr Lys Gly Thr Tyr Met Lys Phe Ser Trp Leu Thr Val Pro Glu Arg65 70 75 80Ala Met Gly Lys Glu His Ser Cys Ile Val Lys His Glu Asn Asn Lys 85 90 95Gly Gly Ala Asp Gln Glu Ile Phe Phe Pro Ser Ile Lys Lys Val Ala 100 105 110Thr Thr Cys Trp Gln Asp Lys Asn Asp Val Leu Gln Phe Gln Phe Thr 115 120 125Ser Thr Ser Ala Tyr Tyr Thr Tyr Leu Leu Leu Leu Leu Lys Ser Val 130 135 140Ile Tyr Leu Ala Ile Ile Ser Phe Ser Leu Leu Arg Arg Thr Ser Val145 150 155 160Cys Gly Asn Glu Lys Lys Ser 16526172PRTMus musculus 26Asp Lys Lys Leu Asp Ala Asp Ile Ser Pro Lys Pro Thr Ile Phe Leu1 5 10 15Pro Ser Val Ala Glu Thr Asn Leu His Lys Thr Gly Thr Tyr Leu Cys 20 25 30Val Leu Glu Lys Phe Phe Pro Asp Val Ile Arg Val Tyr Trp Lys Glu 35 40 45Lys Lys Gly Asn Thr Ile Leu Asp Ser Gln Glu Gly Asp Met Leu Lys 50 55 60Thr Asn Asp Thr Tyr Met Lys Phe Ser Trp Leu Thr Val Pro Glu Arg65 70 75 80Ser Met Gly Lys Glu His Arg Cys Ile Val Lys His Glu Asn Asn Lys 85 90 95Gly Gly Ala Asp Gln Glu Ile Phe Phe Pro Thr Ile Lys Lys Val Ala 100 105 110Val Ser Thr Lys Pro Thr Thr Cys Trp Gln Asp Lys Asn Asp Val Leu 115 120 125Gln Leu Gln Phe Thr Ile Thr Ser Ala Tyr Tyr Thr Tyr Leu Leu Leu 130 135 140Leu Leu Lys Ser Val Ile Tyr Leu Ala Ile Ile Ser Phe Ser Leu Leu145 150 155 160Arg Arg Thr Ser Val Cys Cys Asn Glu Lys Lys Ser 165 17027169PRTMus musculus 27Pro Ser Asp Lys Arg Leu Asp Ala Asp Ile Ser Pro Lys Pro Thr Ile1 5 10 15Phe Leu Pro Ser Val Ala Glu Thr Asn Leu His Lys Thr Gly Thr Tyr 20 25 30Leu Cys Ile Leu Glu Lys Phe Phe Pro Asp Val Ile Arg Val Tyr Trp 35 40 45Lys Asp Lys Asn Gly Asn Thr Ile Leu Asp Ser Gln Glu Gly Asp Thr 50 55 60Leu Lys Thr Lys Gly Thr Tyr Met Lys Phe Ser Trp Leu Thr Val Pro65 70 75 80Glu Arg Ser Met Gly Lys Glu His Arg Cys Ile Val Lys His Glu Asn 85 90 95Asn Lys Gly Gly Ala Asp Gln Glu Ile Phe Phe Pro Ser Ile Lys Lys 100 105 110Val Ala Thr Thr Cys Trp Gln Asp Lys Asn Asp Val Leu Gln Leu Gln 115 120 125Phe Met Ser Thr Ser Ala Tyr Tyr Thr Tyr Leu Leu Leu Leu Leu Lys 130 135 140Ser Val Ile Tyr Leu Ala Ile Ile Ser Phe Ser Leu Leu Arg Arg Thr145 150 155 160Ser Val Cys Cys Asn Glu Lys Arg Ser 16528190PRTMus musculus 28Asp Lys Arg Thr Asp Ser Asp Phe Ser Pro Lys Pro Thr Ile Phe Leu1 5 10 15Pro Ser Ala Ala Glu Thr Asn Leu His Lys Ala Gly Thr Tyr Leu Cys 20 25 30Leu Leu Glu Lys Phe Phe Pro Lys Val Ile Arg Val Tyr Trp Lys Glu 35 40 45Lys Asp Gly Glu Lys Ile Leu Glu Ser Gln Glu Gly Asn Thr Ile Lys 50 55 60Thr Asn Asp Arg Tyr Met Lys Phe Ser Trp Leu Thr Val Thr Glu Asp65 70 75 80Ser Met Ala Lys Glu His Ser Cys Ile Val Lys His Glu Asn Asn Lys 85 90 95Arg Gly Val Asp Gln Glu Ile Leu Phe Pro Pro Ile Gly Lys Ala Phe 100 105 110Thr Thr Ile Asn Val Asn Pro Arg Asp Ser Val Leu Arg His Glu Asn 115 120 125Val Asn Asn Ala Thr Asp Leu Glu Asp Cys Met Lys Gly Arg Lys Asp 130 135 140Met Leu Gln Leu Gln Val Thr Thr Thr Tyr Ala Phe Tyr Thr Tyr Leu145 150 155 160Ile Leu Phe Phe Lys Ser Met Val His Leu Ala Phe Val Val Phe Cys 165 170 175Leu Phe Arg Arg Ala Ala Met Ser Cys Asp Asp Gln Arg Ser 180 185 1902916PRTManduca sexta 29Ala Asn Glu Arg Ala Asp Leu Ile Ala Tyr Leu Lys Gln Ala Thr Lys1 5 10 1530263PRTArtificial SequenceSynthetic sequence comprising a MHC portion and a TCR portion 30Met Ala Thr Ile Gly Ala Leu Leu Leu Arg Phe Phe Phe Ile Ala Val1 5 10 15Leu Met Ser Ser Gln Lys Ser Trp Ala Ile Lys Glu Glu His Thr Ile 20 25 30Ile Gln Ala Glu Phe Tyr Leu Leu Pro Asp Lys Arg Gly Glu Phe Met 35 40 45Phe Asp Phe Asp Gly Asp Glu Ile Phe His Val Asp Ile Glu Lys Ser 50 55 60Glu Thr Ile Trp Arg Leu Glu Glu Phe Ala Lys Phe Ala Ser Phe Glu65 70 75 80Ala Gln Gly Ala Leu Ala Asn Ile Ala Val Asp Lys Ala Asn Leu Asp 85 90 95Val Met Lys Glu Arg Ser Asn Asn Thr Pro Asp Ala Asn Val Ala Pro 100 105 110Glu Val Thr Val Leu Ser Arg Ser Pro Val Asn Leu Gly Glu Pro Asn 115 120 125Ile Leu Ile Cys Phe Ile Asp Lys Phe Ser Pro Pro Val Val Asn Val 130 135 140Thr Trp Phe Arg Asn Gly Arg Pro Val Thr Glu Gly Val Ser Glu Thr145 150 155 160Val Phe Leu Pro Arg Asp Asp His Leu Phe Arg Lys Phe His Tyr Leu 165 170 175Thr Phe Leu Pro Ser Thr Asp Asp Phe Tyr Asp Cys Glu Val Asp His 180 185 190Trp Gly Leu Glu Glu Pro Leu Arg Lys His Trp Glu Phe Glu Glu Lys 195 200 205Thr Leu Leu Pro Glu Thr Lys Glu Cys Asp Ala Thr Leu Thr Glu Lys 210 215 220Ser Phe Glu Thr Asp Met Asn Leu Asn Phe Gln Asn Leu Ser Val Met225 230 235 240Gly Leu Arg Ile Leu Leu Leu Lys Val Ala Gly Phe Asn Leu Leu Met 245 250 255Thr Leu Arg Leu Trp Ser Ser 26031315PRTArtificial SequenceSynthetic sequence comprising a MHC portion and a TCR portion 31Met Val Trp Leu Pro Arg Val Pro Cys Val Ala Ala Val Ile Leu Leu1 5 10 15Leu Thr Val Leu Ser Pro Pro Val Ala Leu Val Arg Asp Ser Gly Ser 20 25 30Ala Asn Glu Arg Ala Asp Leu Ile Ala Tyr Leu Lys Gln Ala Thr Lys 35 40 45Glu Phe Arg Ser Gly Gly Gly Gly Ser Leu Val Pro Arg Gly Ser Gly 50 55 60Gly Gly Gly Ser Val Asp Arg Pro Trp Phe Leu Glu Tyr Cys Lys Ser65 70 75 80Glu Cys His Phe Tyr Asn Gly Thr Gln Arg Val Arg Leu Leu Val Arg 85 90 95Tyr Phe Tyr Asn Leu Glu Glu Asn Leu Arg Phe Asp Ser Asp Val Gly 100 105 110Glu Phe Arg Ala Val Thr Glu Leu Gly Arg Pro Asp Ala Glu Asn Trp 115 120 125Asn Ser Gln Pro Glu Phe Leu Glu Gln Lys Arg Ala Glu Val Asp Thr 130 135 140Val Cys Arg His Asn Tyr Glu Ile Phe Asp Asn Phe Leu Val Pro Arg145 150 155 160Arg Val Glu Pro Thr Val Thr Val Tyr Pro Thr Lys Thr Gln Pro Leu 165 170 175Glu His His Asn Leu Leu Val Cys Ser Val Ser Asp Phe Tyr Pro Gly 180 185 190Asn Ile Glu Val Arg Trp Phe Arg Asn Gly Lys Glu Glu Lys Thr Gly 195 200 205Ile Val Ser Thr Gly Leu Val Arg Asn Gly Asp Trp Thr Phe Gln Thr 210 215 220Leu Val Met Leu Glu Thr Val Pro Gln Ser Gly Glu Val Tyr Thr Cys225 230 235 240Gln Val Glu His Pro Ser Leu Thr Asp Pro Val Thr Val Glu Trp Lys 245 250 255Ala Gln Ser Thr Ser Ala Gln Asn Lys Cys Gly Ile Thr Ser Ala Ser 260 265 270Tyr His Gln Gly Val Leu Ser Ala Thr Ile Leu Tyr Glu Ile Leu Leu 275 280 285Gly Lys Ala Thr Leu Tyr Ala Val Leu Val Ser Gly Leu Val Leu Met 290 295 300Ala Met Val Lys Lys Lys Asn Ser Ala Ala Ala305 310 31532312PRTArtificial SequenceSynthetic sequence comprising a MHC portion and a TCR portion 32Met Val Trp Leu Pro Arg Val Pro Cys Val Ala Ala Val Ile Leu Leu1 5 10 15Leu Thr Val Leu Ser Pro Pro Val Ala Leu Val Arg Asp Ser Gly Ser 20 25 30Gly Lys Lys Val Ile Thr Ala Phe Asn Glu Gly Leu Lys Glu Phe Arg 35 40 45Ser Gly Gly Gly Gly Ser Leu Val Pro Arg Gly Ser Gly Gly Gly Gly 50 55 60Ser Val Asp Arg Pro Trp Phe Leu Glu Tyr Cys Lys Ser Glu Cys His65 70 75 80Phe Tyr Asn Gly Thr Gln Arg Val Arg Leu Leu Val Arg Tyr Phe Tyr 85 90 95Asn Leu Glu Glu Asn Leu Arg Phe Asp Ser Asp Val Gly Glu Phe Arg 100 105 110Ala Val Thr Glu Leu Gly Arg Pro Asp Ala Glu Asn Trp Asn Ser Gln 115 120 125Pro Glu Phe Leu Glu Gln Lys Arg Ala Glu Val Asp Thr Val Cys Arg 130 135 140His Asn Tyr Glu Ile Phe Asp Asn Phe Leu Val Pro Arg Arg Val Glu145

150 155 160Pro Thr Val Thr Val Tyr Pro Thr Lys Thr Gln Pro Leu Glu His His 165 170 175Asn Leu Leu Val Cys Ser Val Ser Asp Phe Tyr Pro Gly Asn Ile Glu 180 185 190Val Arg Trp Phe Arg Asn Gly Lys Glu Glu Lys Thr Gly Ile Val Ser 195 200 205Thr Gly Leu Val Arg Asn Gly Asp Trp Thr Phe Gln Thr Leu Val Met 210 215 220Leu Glu Thr Val Pro Gln Ser Gly Glu Val Tyr Thr Cys Gln Val Glu225 230 235 240His Pro Ser Leu Thr Asp Pro Val Thr Val Glu Trp Lys Ala Gln Ser 245 250 255Thr Ser Ala Gln Asn Lys Cys Gly Ile Thr Ser Ala Ser Tyr His Gln 260 265 270Gly Val Leu Ser Ala Thr Ile Leu Tyr Glu Ile Leu Leu Gly Lys Ala 275 280 285Thr Leu Tyr Ala Val Leu Val Ser Gly Leu Val Leu Met Ala Met Val 290 295 300Lys Lys Lys Asn Ser Ala Ala Ala305 31033797PRTArtificial SequenceSynthetic peptide comprising a fusion of CD80 and Lck 33Met Ala Cys Asn Cys Gln Leu Met Gln Asp Thr Pro Leu Leu Lys Phe1 5 10 15Pro Cys Pro Arg Leu Ile Leu Leu Phe Val Leu Leu Ile Arg Leu Ser 20 25 30Gln Val Ser Ser Asp Val Asp Glu Gln Leu Ser Lys Ser Val Lys Asp 35 40 45Lys Val Leu Leu Pro Cys Arg Tyr Asn Ser Pro His Glu Asp Glu Ser 50 55 60Glu Asp Arg Ile Tyr Trp Gln Lys His Asp Lys Val Val Leu Ser Val65 70 75 80Ile Ala Gly Lys Leu Lys Val Trp Pro Glu Tyr Lys Asn Arg Thr Leu 85 90 95Tyr Asp Asn Thr Thr Tyr Ser Leu Ile Ile Leu Gly Leu Val Leu Ser 100 105 110Asp Arg Gly Thr Tyr Ser Cys Val Val Gln Lys Lys Glu Arg Gly Thr 115 120 125Tyr Glu Val Lys His Leu Ala Leu Val Lys Leu Ser Ile Lys Ala Asp 130 135 140Phe Ser Thr Pro Asn Ile Thr Glu Ser Gly Asn Pro Ser Ala Asp Thr145 150 155 160Lys Arg Ile Thr Cys Phe Ala Ser Gly Gly Phe Pro Lys Pro Arg Phe 165 170 175Ser Trp Leu Glu Asn Gly Arg Glu Leu Pro Gly Ile Asn Thr Thr Ile 180 185 190Ser Gln Asp Pro Glu Ser Glu Leu Tyr Thr Ile Ser Ser Gln Leu Asp 195 200 205Phe Asn Thr Thr Arg Asn His Thr Ile Lys Cys Leu Ile Lys Tyr Gly 210 215 220Asp Ala His Val Ser Glu Asp Phe Thr Trp Glu Lys Pro Pro Glu Asp225 230 235 240Pro Pro Asp Ser Lys Asn Thr Leu Val Leu Phe Gly Ala Gly Phe Gly 245 250 255Ala Val Ile Thr Val Val Val Ile Val Val Ile Ile Lys Cys Phe Cys 260 265 270Lys His Arg Ser Cys Phe Arg Arg Asn Glu Ala Ser Arg Glu Thr Asn 275 280 285Asn Ser Leu Thr Phe Gly Pro Glu Glu Ala Leu Ala Glu Gln Thr Val 290 295 300Phe Leu Thr Thr Ser His Tyr Pro Ile Val Pro Leu Asp Ser Lys Ile305 310 315 320Ser Leu Pro Ile Arg Asn Gly Ser Glu Val Arg Asp Pro Leu Val Thr 325 330 335Tyr Glu Gly Ser Leu Pro Pro Ala Ser Pro Leu Gln Asp Asn Leu Val 340 345 350Ile Ala Leu His Ser Tyr Glu Pro Ser His Asp Gly Asp Leu Gly Phe 355 360 365Glu Lys Gly Glu Gln Leu Arg Ile Leu Glu Gln Ser Gly Glu Trp Trp 370 375 380Lys Ala Gln Ser Leu Thr Thr Gly Gln Glu Gly Phe Ile Pro Phe Asn385 390 395 400Phe Val Ala Lys Ala Asn Ser Leu Glu Pro Glu Pro Trp Phe Phe Lys 405 410 415Asn Leu Ser Arg Lys Asp Ala Glu Arg Gln Leu Leu Ala Pro Gly Asn 420 425 430Thr His Gly Ser Phe Leu Ile Arg Glu Ser Glu Ser Thr Ala Gly Ser 435 440 445Phe Ser Leu Ser Val Arg Asp Phe Asp Gln Asn Gln Gly Glu Val Val 450 455 460Lys His Tyr Lys Ile Arg Asn Leu Asp Asn Gly Gly Phe Tyr Ile Ser465 470 475 480Pro Arg Ile Thr Phe Pro Gly Leu His Asp Leu Val Arg His Tyr Thr 485 490 495Asn Ala Ser Asp Gly Leu Cys Thr Lys Leu Ser Arg Pro Cys Gln Thr 500 505 510Gln Lys Pro Gln Lys Pro Trp Trp Glu Asp Glu Trp Glu Val Pro Arg 515 520 525Glu Thr Leu Lys Leu Val Glu Arg Leu Gly Ala Gly Gln Phe Gly Glu 530 535 540Val Trp Met Gly Tyr Tyr Asn Gly His Thr Lys Val Ala Val Lys Ser545 550 555 560Leu Lys Gln Gly Ser Met Ser Pro Asp Ala Phe Leu Ala Glu Ala Asn 565 570 575Leu Met Lys Gln Leu Gln His Pro Arg Leu Val Arg Leu Tyr Ala Val 580 585 590Val Thr Gln Glu Pro Ile Tyr Ile Ile Thr Glu Tyr Met Glu Asn Gly 595 600 605Ser Leu Val Asp Phe Leu Lys Thr Pro Ser Gly Ile Lys Leu Asn Val 610 615 620Asn Lys Leu Leu Asp Met Ala Ala Gln Ile Ala Glu Gly Met Ala Phe625 630 635 640Ile Glu Glu Gln Asn Tyr Ile His Arg Asp Leu Arg Ala Ala Asn Ile 645 650 655Leu Val Ser Asp Thr Leu Ser Cys Lys Ile Ala Asp Phe Gly Leu Ala 660 665 670Arg Leu Ile Glu Asp Asn Glu Tyr Thr Ala Arg Glu Gly Ala Lys Phe 675 680 685Pro Ile Lys Trp Thr Ala Pro Glu Ala Ile Asn Tyr Gly Thr Phe Thr 690 695 700Ile Lys Ser Asp Val Trp Ser Phe Gly Ile Leu Leu Thr Glu Ile Val705 710 715 720Thr His Gly Arg Ile Pro Tyr Pro Gly Met Thr Asn Pro Glu Val Ile 725 730 735Gln Asn Leu Glu Arg Gly Tyr Arg Met Val Arg Pro Asp Asn Cys Pro 740 745 750Glu Glu Leu Tyr His Leu Met Met Leu Cys Trp Lys Glu Arg Pro Glu 755 760 765Asp Arg Pro Thr Phe Asp Tyr Leu Arg Ser Val Leu Asp Asp Phe Phe 770 775 780Thr Ala Thr Glu Gly Gln Tyr Gln Pro Gln Pro Gly Thr785 790 79534800PRTArtificial SequenceSynthetic peptide comprising a fusion of CD86 and Lck 34Met Asp Pro Arg Cys Thr Met Gly Leu Ala Ile Leu Ile Phe Val Thr1 5 10 15Val Leu Leu Ile Ser Asp Ala Val Ser Val Glu Thr Gln Ala Tyr Phe 20 25 30Asn Gly Thr Ala Tyr Leu Pro Cys Pro Phe Thr Lys Ala Gln Asn Ile 35 40 45Ser Leu Ser Glu Leu Val Val Phe Trp Gln Asp Gln Gln Lys Leu Val 50 55 60Leu Tyr Glu His Tyr Leu Gly Thr Glu Lys Leu Asp Ser Val Asn Ala65 70 75 80Lys Tyr Leu Gly Arg Thr Ser Phe Asp Arg Asn Asn Trp Thr Leu Arg 85 90 95Leu His Asn Val Gln Ile Lys Asp Met Gly Ser Tyr Asp Cys Phe Ile 100 105 110Gln Lys Lys Pro Pro Thr Gly Ser Ile Ile Leu Gln Gln Thr Leu Thr 115 120 125Glu Leu Ser Val Ile Ala Asn Phe Ser Glu Pro Glu Ile Lys Leu Ala 130 135 140Gln Asn Val Thr Gly Asn Ser Gly Ile Asn Leu Thr Cys Thr Ser Lys145 150 155 160Gln Gly His Pro Lys Pro Lys Lys Met Tyr Phe Leu Ile Thr Asn Ser 165 170 175Thr Asn Glu Tyr Gly Asp Asn Met Gln Ile Ser Gln Asp Asn Val Thr 180 185 190Glu Leu Phe Ser Ile Ser Asn Ser Leu Ser Leu Ser Phe Pro Asp Gly 195 200 205Val Trp His Met Thr Val Val Cys Val Leu Glu Thr Glu Ser Met Lys 210 215 220Ile Ser Ser Lys Pro Leu Asn Phe Thr Gln Glu Phe Pro Ser Pro Gln225 230 235 240Thr Tyr Trp Lys Glu Ile Thr Ala Ser Val Thr Val Ala Leu Leu Leu 245 250 255Val Met Leu Leu Ile Ile Val Cys His Lys Lys Pro Asn Gln Pro Ser 260 265 270Arg Pro Ser Asn Thr Ala Ser Lys Leu Glu Arg Asp Ser Asn Ala Asp 275 280 285Arg Glu Thr Ile Asn Leu Lys Glu Leu Glu Pro Gln Ile Ala Ser Ala 290 295 300Lys Pro Asn Ala Glu Cys Thr Ser His Tyr Pro Ile Val Pro Leu Asp305 310 315 320Ser Lys Ile Ser Leu Pro Ile Arg Asn Gly Ser Glu Val Arg Asp Pro 325 330 335Leu Val Thr Tyr Glu Gly Ser Leu Pro Pro Ala Ser Pro Leu Gln Asp 340 345 350Asn Leu Val Ile Ala Leu His Ser Tyr Glu Pro Ser His Asp Gly Asp 355 360 365Leu Gly Phe Glu Lys Gly Glu Gln Leu Arg Ile Leu Glu Gln Ser Gly 370 375 380Glu Trp Trp Lys Ala Gln Ser Leu Thr Thr Gly Gln Glu Gly Phe Ile385 390 395 400Pro Phe Asn Phe Val Ala Lys Ala Asn Ser Leu Glu Pro Glu Pro Trp 405 410 415Phe Phe Lys Asn Leu Ser Arg Lys Asp Ala Glu Arg Gln Leu Leu Ala 420 425 430Pro Gly Asn Thr His Gly Ser Phe Leu Ile Arg Glu Ser Glu Ser Thr 435 440 445Ala Gly Ser Phe Ser Leu Ser Val Arg Asp Phe Asp Gln Asn Gln Gly 450 455 460Glu Val Val Lys His Tyr Lys Ile Arg Asn Leu Asp Asn Gly Gly Phe465 470 475 480Tyr Ile Ser Pro Arg Ile Thr Phe Pro Gly Leu His Asp Leu Val Arg 485 490 495His Tyr Thr Asn Ala Ser Asp Gly Leu Cys Thr Lys Leu Ser Arg Pro 500 505 510Cys Gln Thr Gln Lys Pro Gln Lys Pro Trp Trp Glu Asp Glu Trp Glu 515 520 525Val Pro Arg Glu Thr Leu Lys Leu Val Glu Arg Leu Gly Ala Gly Gln 530 535 540Phe Gly Glu Val Trp Met Gly Tyr Tyr Asn Gly His Thr Lys Val Ala545 550 555 560Val Lys Ser Leu Lys Gln Gly Ser Met Ser Pro Asp Ala Phe Leu Ala 565 570 575Glu Ala Asn Leu Met Lys Gln Leu Gln His Pro Arg Leu Val Arg Leu 580 585 590Tyr Ala Val Val Thr Gln Glu Pro Ile Tyr Ile Ile Thr Glu Tyr Met 595 600 605Glu Asn Gly Ser Leu Val Asp Phe Leu Lys Thr Pro Ser Gly Ile Lys 610 615 620Leu Asn Val Asn Lys Leu Leu Asp Met Ala Ala Gln Ile Ala Glu Gly625 630 635 640Met Ala Phe Ile Glu Glu Gln Asn Tyr Ile His Arg Asp Leu Arg Ala 645 650 655Ala Asn Ile Leu Val Ser Asp Thr Leu Ser Cys Lys Ile Ala Asp Phe 660 665 670Gly Leu Ala Arg Leu Ile Glu Asp Asn Glu Tyr Thr Ala Arg Glu Gly 675 680 685Ala Lys Phe Pro Ile Lys Trp Thr Ala Pro Glu Ala Ile Asn Tyr Gly 690 695 700Thr Phe Thr Ile Lys Ser Asp Val Trp Ser Phe Gly Ile Leu Leu Thr705 710 715 720Glu Ile Val Thr His Gly Arg Ile Pro Tyr Pro Gly Met Thr Asn Pro 725 730 735Glu Val Ile Gln Asn Leu Glu Arg Gly Tyr Arg Met Val Arg Pro Asp 740 745 750Asn Cys Pro Glu Glu Leu Tyr His Leu Met Met Leu Cys Trp Lys Glu 755 760 765Arg Pro Glu Asp Arg Pro Thr Phe Asp Tyr Leu Arg Ser Val Leu Asp 770 775 780Asp Phe Phe Thr Ala Thr Glu Gly Gln Tyr Gln Pro Gln Pro Gly Thr785 790 795 80035824DNAArtificial SequenceNucleotide sequence for synthetic peptide comprising an MHC portion and a TCR portion (see SEQ ID NO 30) 35aataagcttc tcgagcgcca ccatggccac aattggagcc ctgctgttaa gatttttctt 60cattgctgtt ctgatgagct cccagaagtc atgggctatc aaagaggaac acaccatcat 120ccaggcggag ttctatcttt taccagacaa acgtggagag tttatgtttg actttgacgg 180cgatgagatt ttccatgtag acattgaaaa gtcagagacc atctggagac ttgaagaatt 240tgcaaagttt gccagctttg aggctcaggg tgcactggct aatatagctg tggacaaagc 300taacctggat gtcatgaaag agcgttccaa caacactcca gatgccaacg tggccccaga 360ggtgactgta ctctccagaa gccctgtgaa cctgggagag cccaacatcc tcatctgttt 420cattgacaag ttctcccctc cagtggtcaa tgtcacctgg ttccggaatg gacggcctgt 480caccgaaggc gtgtcagaga cagtgtttct cccgagggac gatcacctct tccgcaaatt 540ccactatctg accttcctgc cctccacaga tgatttctat gactgtgagg tggatcactg 600gggtttggag gagcctctgc ggaagcactg ggagtttgaa gagaaaaccc tcctcccaga 660aactaaagag tgtgatgcca cgttgaccga gaaaagcttt gaaacagata tgaacctaaa 720ctttcaaaac ctgtcagtta tgggactccg aatcctcctg ctgaaagtag cgggatttaa 780cctgctcatg acgctgaggc tgtggtccag ttgaggatcc gcta 82436988DNAArtificial SequenceNucleotide sequence for synthetic peptide comprising an MHC portion and a TCR portion (see SEQ ID NO 31) 36aatctcgagc gccaccatgg tgtggctccc cagagttccc tgtgtggcag ctgtgatcct 60gttgctgaca gtgctgagcc ctccagtggc tttggtcaga gactccggat ccgccaacga 120gagggccgac ctgatcgcct acctgaagca ggccaccaag gaattcagat ccggaggcgg 180aggctccctg gtgcctcggg gctccggagg cggaggctcc gtcgacagac catggttttt 240ggaatactgt aaatctgagt gtcatttcta caacgggacg cagcgcgtgc ggcttctggt 300aagatacttc tacaacctgg aggagaacct gcgcttcgac agcgacgtgg gcgagttccg 360cgcggtgacc gagctggggc ggccagacgc cgagaactgg aacagccagc cggagttcct 420ggagcaaaag cgggccgagg tggacacggt gtgcagacac aactatgaga tcttcgataa 480cttccttgtg ccgcggagag ttgagcctac ggtgactgtg taccccacaa agacgcagcc 540cctggaacac cacaacctcc tggtctgctc tgtgagtgac ttctaccctg gcaacattga 600agtcagatgg ttccggaatg gcaaggagga gaaaacagga attgtgtcca cgggcctggt 660ccgaaatgga gactggacct tccagacact ggtgatgctg gagacggttc ctcagagtgg 720agaggtttac acctgccagg tggagcatcc cagcctgacc gaccctgtca cggtcgagtg 780gaaagcacag tccacatctg cacagaacaa gtgtggaatc actagtgcat cctatcatca 840gggggttctg tctgcaacca tcctctatga gatcctactg gggaaggcca ccctatatgc 900tgtgctggtc agtggcctag tgctgatggc catggtcaag aaaaaaaatt ccgcggccgc 960atgatgagat ctgagctcca tagaggcg 98837979DNAArtificial SequenceNucleotide sequence for synthetic peptide comprising an MHC portion and a TCR portion (see SEQ ID NO 32) 37aatctcgagc gccaccatgg tgtggctccc cagagttccc tgtgtggcag ctgtgatcct 60gttgctgaca gtgctgagcc ctccagtggc tttggtcaga gactccggat ccggcaagaa 120ggtgatcacc gccttcaacg agggcctgaa ggaattcaga tccggaggcg gaggctccct 180ggtgcctcgg ggctccggag gcggaggctc cgtcgacaga ccatggtttt tggaatactg 240taaatctgag tgtcatttct acaacgggac gcagcgcgtg cggcttctgg taagatactt 300ctacaacctg gaggagaacc tgcgcttcga cagcgacgtg ggcgagttcc gcgcggtgac 360cgagctgggg cggccagacg ccgagaactg gaacagccag ccggagttcc tggagcaaaa 420gcgggccgag gtggacacgg tgtgcagaca caactatgag atcttcgata acttccttgt 480gccgcggaga gttgagccta cggtgactgt gtaccccaca aagacgcagc ccctggaaca 540ccacaacctc ctggtctgct ctgtgagtga cttctaccct ggcaacattg aagtcagatg 600gttccggaat ggcaaggagg agaaaacagg aattgtgtcc acgggcctgg tccgaaatgg 660agactggacc ttccagacac tggtgatgct ggagacggtt cctcagagtg gagaggttta 720cacctgccag gtggagcatc ccagcctgac cgaccctgtc acggtcgagt ggaaagcaca 780gtccacatct gcacagaaca agtgtggaat cactagtgca tcctatcatc agggggttct 840gtctgcaacc atcctctatg agatcctact ggggaaggcc accctatatg ctgtgctggt 900cagtggccta gtgctgatgg ccatggtcaa gaaaaaaaat tccgcggccg catgatgaga 960tctgagctcc atagaggcg 979382433DNAArtificial SequenceNucleotide sequence for synthetic peptide comprising a fusion of CD80 and Lck (see SEQ ID NO 33) 38acgtctagat acctcgaggc caccatggct tgcaattgtc agttgatgca ggatacacca 60ctcctcaagt ttccatgtcc aaggctcatt cttctctttg tgctgctgat tcgtctttca 120caagtgtctt cagatgttga tgaacaactg tccaagtcag tgaaagataa ggtattgctg 180ccttgccgtt acaactctcc tcatgaagat gagtctgaag accgaatcta ctggcaaaaa 240catgacaaag tggtgctgtc tgtcattgct gggaaactaa aagtgtggcc cgagtataag 300aaccggactt tatatgacaa cactacctac tctcttatca tcctgggcct ggtcctttca 360gaccggggca catacagctg tgtcgttcaa aagaaggaaa gaggaacgta tgaagttaaa 420cacttggctt tagtaaagtt gtccatcaaa gctgacttct ctacccccaa cataactgag 480tctggaaacc catctgcaga cactaaaagg attacctgct ttgcttccgg gggtttccca 540aagcctcgct tctcttggtt ggaaaatgga agagaattac ctggcatcaa tacgacaatt 600tcccaggatc ctgaatctga attgtacacc attagtagcc aactagattt caatacgact 660cgcaaccaca ccattaagtg tctcattaaa tatggagatg ctcacgtgtc agaggacttc 720acctgggaaa aacccccaga agaccctcct gatagcaaga acacacttgt gctctttggg 780gcaggattcg gcgcagtaat aacagtcgtc gtcatcgttg tcatcatcaa atgcttctgt 840aagcacagaa gctgtttcag aagaaatgag gcaagcagag aaacaaacaa cagccttacc

900ttcgggcctg aagaagcatt agctgaacag accgtcttcc ttaccactag tcactatccc 960atagtcccac tggacagcaa gatctcgctg cccatccgga atggctctga agtgcgggac 1020ccactggtca cctatgaggg atctctccca ccagcatccc cgctgcaaga caacctggtt 1080atcgccctgc acagttatga gccctcccat gatggagact tgggctttga gaagggtgaa 1140cagctccgaa tcctggagca gagcggtgag tggtggaagg ctcagtccct gacgactggc 1200caagaaggct tcattccctt caacttcgtg gcgaaagcaa acagcctgga gcctgaacct 1260tggttcttca agaatctgag ccgtaaggac gccgagcggc agcttttggc gcccgggaac 1320acgcatggat ccttcctgat ccgggaaagc gaaagcactg cggggtcctt ttccctgtcg 1380gtcagagact tcgaccagaa ccagggagaa gtggtgaaac attacaagat ccgtaaccta 1440gacaacggtg gcttctacat ctcccctcgt atcacttttc ccggattgca cgatctagtc 1500cgccattaca ccaacgcctc tgatgggctg tgcacaaagt tgagccgtcc ttgccagacc 1560cagaagcccc agaaaccatg gtgggaggac gaatgggaag ttcccaggga aacactgaag 1620ttggtggagc ggctgggagc tggccagttc ggggaagtgt ggatggggta ctacaacgga 1680cacacgaagg tggcggtgaa gagtctgaaa caagggagca tgtcccccga cgccttcctg 1740gctgaggcta acctcatgaa gcagctgcag cacccgcggc tagtccggct ttatgcagtg 1800gtcacccagg aacccatcta catcatcacg gaatacatgg agaacgggag cctagtagat 1860tttctcaaga ctccctcggg catcaagttg aatgtcaaca aacttttgga catggcagcc 1920cagattgcag agggcatggc gttcatcgaa gaacagaatt acatccatcg ggacctgcgc 1980gccgccaaca tcctggtgtc tgacacgctg agctgcaaga ttgcagactt tggcctggcg 2040cgcctcattg aggacaatga gtacacggcc cgggaggggg ccaaatttcc cattaagtgg 2100acagcaccag aagccattaa ctatgggacc ttcaccatca agtcagacgt gtggtccttc 2160gggatcttgc ttacagagat cgtcacccac ggtcgaatcc cttacccagg aatgaccaac 2220cctgaagtca ttcagaacct ggagagaggc taccgcatgg tgagacctga caactgtccg 2280gaagagctgt accacctcat gatgctgtgc tggaaggagc gcccagagga ccggcccacg 2340tttgactacc ttcggagtgt tctggatgac ttcttcacag ccacagaggg ccagtaccag 2400ccccagcctg gtacctagtg agaattctac atg 2433392442DNAArtificial SequenceNucleotide sequence for synthetic peptide comprising a fusion of CD86 and Lck (see SEQ ID NO 34) 39tactctagat acctcgaggc caccatggac cccagatgca ccatgggctt ggcaatcctt 60atctttgtga cagtcttgct gatctcagat gctgtttccg tggagacgca agcttatttc 120aatgggactg catatctgcc gtgcccattt acaaaggctc aaaacataag cctgagtgag 180ctggtagtat tttggcagga ccagcaaaag ttggttctgt acgagcacta tttgggcaca 240gagaaacttg atagtgtgaa tgccaagtac ctgggccgca cgagctttga caggaacaac 300tggactctac gacttcacaa tgttcagatc aaggacatgg gctcgtatga ttgttttata 360caaaaaaagc cacccacagg atcaattatc ctccaacaga cattaacaga actgtcagtg 420atcgccaact tcagtgaacc tgaaataaaa ctggctcaga atgtaacagg aaattctggc 480ataaatttga cctgcacgtc taagcaaggt cacccgaaac ctaagaagat gtattttctg 540ataactaatt caactaatga gtatggtgat aacatgcaga tatcacaaga taatgtcaca 600gaactgttca gtatctccaa cagcctctct ctttcattcc cggatggtgt gtggcatatg 660accgttgtgt gtgttctgga aacggagtca atgaagattt cctccaaacc tctcaatttc 720actcaagagt ttccatctcc tcaaacgtat tggaaggaga ttacagcttc agttactgtg 780gccctcctcc ttgtgatgct gctcatcatt gtatgtcaca agaagccgaa tcagcctagc 840aggcccagca acacagcctc taagttagag cgggatagta acgctgacag agagactatc 900aacctgaagg aacttgaacc ccaaattgct tcagcaaaac caaatgcaga gtgtactagt 960cactatccca tagtcccact ggacagcaag atctcgctgc ccatccggaa tggctctgaa 1020gtgcgggacc cactggtcac ctatgaggga tctctcccac cagcatcccc gctgcaagac 1080aacctggtta tcgccctgca cagttatgag ccctcccatg atggagactt gggctttgag 1140aagggtgaac agctccgaat cctggagcag agcggtgagt ggtggaaggc tcagtccctg 1200acgactggcc aagaaggctt cattcccttc aacttcgtgg cgaaagcaaa cagcctggag 1260cctgaacctt ggttcttcaa gaatctgagc cgtaaggacg ccgagcggca gcttttggcg 1320cccgggaaca cgcatggatc cttcctgatc cgggaaagcg aaagcactgc ggggtccttt 1380tccctgtcgg tcagagactt cgaccagaac cagggagaag tggtgaaaca ttacaagatc 1440cgtaacctag acaacggtgg cttctacatc tcccctcgta tcacttttcc cggattgcac 1500gatctagtcc gccattacac caacgcctct gatgggctgt gcacaaagtt gagccgtcct 1560tgccagaccc agaagcccca gaaaccatgg tgggaggacg aatgggaagt tcccagggaa 1620acactgaagt tggtggagcg gctgggagct ggccagttcg gggaagtgtg gatggggtac 1680tacaacggac acacgaaggt ggcggtgaag agtctgaaac aagggagcat gtcccccgac 1740gccttcctgg ctgaggctaa cctcatgaag cagctgcagc acccgcggct agtccggctt 1800tatgcagtgg tcacccagga acccatctac atcatcacgg aatacatgga gaacgggagc 1860ctagtagatt ttctcaagac tccctcgggc atcaagttga atgtcaacaa acttttggac 1920atggcagccc agattgcaga gggcatggcg ttcatcgaag aacagaatta catccatcgg 1980gacctgcgcg ccgccaacat cctggtgtct gacacgctga gctgcaagat tgcagacttt 2040ggcctggcgc gcctcattga ggacaatgag tacacggccc gggagggggc caaatttccc 2100attaagtgga cagcaccaga agccattaac tatgggacct tcaccatcaa gtcagacgtg 2160tggtccttcg ggatcttgct tacagagatc gtcacccacg gtcgaatccc ttacccagga 2220atgaccaacc ctgaagtcat tcagaacctg gagagaggct accgcatggt gagacctgac 2280aactgtccgg aagagctgta ccacctcatg atgctgtgct ggaaggagcg cccagaggac 2340cggcccacgt ttgactacct tcggagtgtt ctggatgact tcttcacagc cacagagggc 2400cagtaccagc cccagcctgg tacctagtga gaattctaca tg 2442

Claims

1. An engineered cell, comprising: a. A chimeric receptor module (MHCR) that comprises: i) an extracellular domain of a major histocompatibility complex (MHC); ii) a T-cell receptor (TCR) portion comprising a transmembrane domain of a TCR, and a cytoplasmic domain of a TCR; and b. A surrogate coreceptor (SCR) that comprises: i) an extracellular region of a cell surface receptor ligand; ii) a transmembrane region; and iii) a kinase.

2. The engineered cell of claim 1, wherein the extracellular domain of the MHC is directly bound to the TCR portion.

3. The engineered cell of claim 1, wherein an antigenic peptide is bound to the extracellular domain of the MHC.

4. The engineered cell of claim 1, wherein the extracellular domain of the MHC is derived from an MHC selected from the group consisting of: HLA-A, HLA-B, HLA-C, Beta2-microglobulin, HLA-DPA, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRA, HLA-DRB, H2-Aa, H2-B1, H2-K1, H2-EB beta, H2-EK alpha, and H2-EK beta.

5. The engineered cell of claim 1, wherein the transmembrane domain and the cytoplasmic domain of the TCR are derived from a TCR selected from the group consisting of: TRAC, TRBC1, TRBC2, TRDC, TRGC1, and TRGC2.

6. The engineered cell of claim 1, wherein the cell surface receptor ligand is a T-cell surface receptor ligand.

7. The engineered cell of claim 1, wherein the T-cell surface receptor ligand is selected from the group consisting of: a CD28 ligand, a CTLA-4 ligand, an ICOS ligand, an OX40 ligand, and a CD2 ligand.

8. The engineered cell of claim 1, wherein the T-cell surface receptor ligand is selected from the group consisting of: CD80 and CD86.

9. The engineered cell of claim 1, wherein the kinase is a Src kinase.

10. The engineered cell of claim 9, wherein said Src kinase is Lck or Fyn.

11. The engineered cell of claim 6, wherein the T-cell surface ligand is CD80, and the kinase is Lck.

12. The engineered cell of claim 6, wherein the T-cell surface ligand is CD86, and the kinase is Lck.

13. The engineered cell of claim 1, wherein said engineered cell is a T cell, NK cell, or NK T cell.