학술논문
Polymorphism between HLA-A*0301 and A*0302 located outside the pocket F alters the PΩ peptide motif N. E. Elamin et al.
Document Type
Article
Source
Subject
*HLA histocompatibility antigens
*PEPTIDES
*ANTIGENS
*SUDANESE
*HISTOCOMPATIBILITY antigens
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*
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Language
ISSN
0001-2815
Abstract
The human leukocyte antigen (HLA)-A03 group has more than 90 known members and is one of the largest families of HLA class I alleles, with the most common variant being HLA-A0301. In this study, we determined the peptide-binding motif of the highly frequent Sudanese allele A0302 and compared it with the previously published peptide-binding motif of A0301. The two alleles differ only at two distinct residues Glu152Val and Leu156Gln, which are predicted to be part of specificity pockets D, C and E and thus in contact with the peptide. Soluble recombinant A0302 was expressed, affinity purified and the bound peptides were then eluted and analysed by mass spectrometry. The peptide-binding motif of A0302 differs significantly from the previously published HLA-A0301 and the Glu152Val/Leu156Gln mismatches appear to have a significant impact on the peptide-binding features of A0302 and A0301. [ABSTRACT FROM AUTHOR]