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Position 45 influences the peptide binding motif of HLA-B44:08
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Position 45 influences the peptide binding motif of HLA-B44:08
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Position 45 influences the peptide binding motif of HLA-B44:08
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Journal Article
Position 45 influences the peptide binding motif of HLA-B44:08
2012
Overview
Position 45 represents a highly polymorphic residue within HLA class I alleles, which contacts the p2 position of bound peptides in 85% of the peptide–HLA structures analyzed, while the neighboring residues 41 and 46 are not involved in peptide binding. To investigate the influence of residue 45 at the functional level, we sequenced peptides eluted from recombinant HLA-B*44:08
41Ala/45Met/46Ala
molecules and compared their features with known peptides from B*44:02
41Thr/45Lys/46Glu
. While HLA-B*44:02 has an anchor motif of E at the p2 anchor position, HLA-B*44:08 exhibits Q and L as anchor motif. The 45
Met/Lys
polymorphism contributes to the alteration in the peptide-binding motif and provides further evidence that mismatches at position 45 should be considered as nonpermissive in a transplantation setting.
Publisher
Springer-Verlag,Springer Nature B.V
