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Tissue Antigens Sep (1997); 50(3):258-64
Interactions of HLA-B*4801 with peptide and CD8.
Martinez-Naves E, Barber LD, Madrigal JA, Vullo CM, Clayberger C, Lyu SC, Williams RC, Gorodezky C, Markow T, Petzl-Erler ML, Parham P
Department of Structural Biology and Microbiology & Immunology, Stanford University School of Medicine, California, USA.
Abstract: Functional properties of the B*4801 allotype were investigated using HLA class I-deficient 221 cells transfected with B*4801 cDNA. From pool sequence analysis of endogenously bound peptides, B*4801 was shown to select for nonamer peptides having glutamine or lysine at position 2 and leucine at the carboxyl-terminus. In an in vitro cell-cell binding assay, B*4801 binds CD8 alpha homodimers weakly due to the presence of a threonine residue at position 245 in the alpha 3 domain. A mutant B*4801 molecule in which alanine replaces threonine 245, binds CD8 alpha homodimers at levels comparable to those of other HLA class I allotypes. Despite the low affinity of B*4801 for CD8 alpha, alloreactive T-cells that recognize B*4801 molecules expressed by the 221 transfectant are inhibited by anti-CD8 monoclonal antibodies. Analysis of 25 B*48-expressing individuals from various populations showed threonine 245 was encoded by every B*48 allele.
[PUBMED: 9331948] Download Biogrid Interactions in a variety of formats including PSI FormatPUBMED
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BioGRID: A General Repository for Interaction Datasets.
Chris Stark, Bobby-Joe Breitkreutz, Teresa Reguly, Lorrie Boucher, Ashton Breitkreutz, Mike Tyers.
Nucleic Acids Res. Jan 1;34:D535-9.