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1e28

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{{STRUCTURE_1e28| PDB=1e28 | SCENE= }}
{{STRUCTURE_1e28| PDB=1e28 | SCENE= }}
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'''NONSTANDARD PEPTIDE BINDING OF HLA-B*5101 COMPLEXED WITH HIV IMMUNODOMINANT EPITOPE KM2(TAFTIPSI)'''
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===NONSTANDARD PEPTIDE BINDING OF HLA-B*5101 COMPLEXED WITH HIV IMMUNODOMINANT EPITOPE KM2(TAFTIPSI)===
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==Overview==
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The crystal structures of the human MHC class I allele HLA-B*5101 in complex with 8-mer, TAFTIPSI, and 9-mer, LPPVVAKEI, immunodominant peptide epitopes from HIV-1 have been determined by x-ray crystallography. In both complexes, the hydrogen-bonding network in the N-terminal anchor (P1) pocket is rearranged as a result of the replacement of the standard tyrosine with histidine at position 171. This results in a nonstandard positioning of the peptide N terminus, which is recognized by B*5101-restricted T cell clones. Unexpectedly, the P5 peptide residues appear to act as anchors, drawing the peptides unusually deeply into the peptide-binding groove of B51. The unique characteristics of P1 and P5 are likely to be responsible for the zig-zag conformation of the 9-mer peptide and the slow assembly of B*5101. A comparison of the surface characteristics in the alpha1-helix C-terminal region for B51 and other MHC class I alleles highlights mainly electrostatic differences that may be important in determining the specificity of human killer cell Ig-like receptor binding.
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(as it appears on PubMed at http://www.pubmed.gov), where 10975842 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10975842}}
==About this Structure==
==About this Structure==
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[[Category: Hla b51]]
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Revision as of 21:01, 30 June 2008

Image:1e28.png

Template:STRUCTURE 1e28

NONSTANDARD PEPTIDE BINDING OF HLA-B*5101 COMPLEXED WITH HIV IMMUNODOMINANT EPITOPE KM2(TAFTIPSI)

Template:ABSTRACT PUBMED 10975842

About this Structure

1E28 is a Protein complex structure of sequences from Homo sapiens and Human immunodeficiency virus 1. Full crystallographic information is available from OCA.

Reference

Nonstandard peptide binding revealed by crystal structures of HLA-B*5101 complexed with HIV immunodominant epitopes., Maenaka K, Maenaka T, Tomiyama H, Takiguchi M, Stuart DI, Jones EY, J Immunol. 2000 Sep 15;165(6):3260-7. PMID:10975842

Page seeded by OCA on Tue Jul 1 00:01:27 2008

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