1of2
From Proteopedia
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==Overview== | ==Overview== | ||
| - | The products of the human leukocyte antigen subtypes HLA-B*2705 and, HLA-B*2709 differ only in residue 116 (Asp vs. His) within the peptide, binding groove but are differentially associated with the autoimmune, disease ankylosing spondylitis (AS); HLA-B*2705 occurs in AS-patients, whereas HLA-B*2709 does not. The subtypes also generate differential T, cell repertoires as exemplified by distinct T cell responses against the, self-peptide pVIPR (RRKWRRWHL). The crystal structures described here show, that pVIPR binds in an unprecedented dual conformation only to HLA-B*2705, molecules. In one binding mode, peptide pArg5 forms a salt bridge to, Asp116, connected with drastically different interactions between peptide, and heavy chain, contrasting with the second, conventional conformation, . | + | The products of the human leukocyte antigen subtypes HLA-B*2705 and, HLA-B*2709 differ only in residue 116 (Asp vs. His) within the peptide, binding groove but are differentially associated with the autoimmune, disease ankylosing spondylitis (AS); HLA-B*2705 occurs in AS-patients, whereas HLA-B*2709 does not. The subtypes also generate differential T, cell repertoires as exemplified by distinct T cell responses against the, self-peptide pVIPR (RRKWRRWHL). The crystal structures described here show, that pVIPR binds in an unprecedented dual conformation only to HLA-B*2705, molecules. In one binding mode, peptide pArg5 forms a salt bridge to, Asp116, connected with drastically different interactions between peptide, and heavy chain, contrasting with the second, conventional conformation, which is exclusively found in the case of B*2709. These subtype-dependent, differences in pVIPR binding link the emergence of dissimilar T cell, repertoires in individuals with HLA-B*2705 or HLA-B*2709 to the buried, Asp116/His116 polymorphism and provide novel insights into peptide, presentation by major histocompatibility antigens. |
==About this Structure== | ==About this Structure== | ||
| - | 1OF2 is a | + | 1OF2 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with MN and GOL as [http://en.wikipedia.org/wiki/ligands ligands]. Structure known Active Site: AC1. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1OF2 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: mhc (major histocompatibility complex)]] | [[Category: mhc (major histocompatibility complex)]] | ||
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 5 14:18:36 2007'' |
Revision as of 12:13, 5 November 2007
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CRYSTAL STRUCTURE OF HLA-B*2709 COMPLEXED WITH THE VASOACTIVE INTESTINAL PEPTIDE TYPE 1 RECEPTOR (VIPR) PEPTIDE (RESIDUES 400-408)
Overview
The products of the human leukocyte antigen subtypes HLA-B*2705 and, HLA-B*2709 differ only in residue 116 (Asp vs. His) within the peptide, binding groove but are differentially associated with the autoimmune, disease ankylosing spondylitis (AS); HLA-B*2705 occurs in AS-patients, whereas HLA-B*2709 does not. The subtypes also generate differential T, cell repertoires as exemplified by distinct T cell responses against the, self-peptide pVIPR (RRKWRRWHL). The crystal structures described here show, that pVIPR binds in an unprecedented dual conformation only to HLA-B*2705, molecules. In one binding mode, peptide pArg5 forms a salt bridge to, Asp116, connected with drastically different interactions between peptide, and heavy chain, contrasting with the second, conventional conformation, which is exclusively found in the case of B*2709. These subtype-dependent, differences in pVIPR binding link the emergence of dissimilar T cell, repertoires in individuals with HLA-B*2705 or HLA-B*2709 to the buried, Asp116/His116 polymorphism and provide novel insights into peptide, presentation by major histocompatibility antigens.
About this Structure
1OF2 is a Protein complex structure of sequences from Homo sapiens with MN and GOL as ligands. Structure known Active Site: AC1. Full crystallographic information is available from OCA.
Reference
Dual, HLA-B27 subtype-dependent conformation of a self-peptide., Hulsmeyer M, Fiorillo MT, Bettosini F, Sorrentino R, Saenger W, Ziegler A, Uchanska-Ziegler B, J Exp Med. 2004 Jan 19;199(2):271-81. PMID:14734527
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