The Direct Binding of a p58 Killer Cell Inhibitory Receptor to Human Histocompatibility Leukocyte Antigen (HLA)-Cw4 Exhibits Peptide Selectivity

作者: Sumati Rajagopalan , Eric O. Long

DOI: 10.1084/JEM.185.8.1523

关键词:

摘要: Natural killer (NK) cells in mice and humans express a number of structurally diverse receptors that inhibit target cell lysis upon recognition major histocompatibility complex (MHC) class I molecules expressed on targets. The contribution peptide to the structural features required for NK inhibition appears vary depending type receptor engaged. Thus, while there is no specificity mediated by Ly-49A mouse, human antigen (HLA)-B*2705–specific clones displayed selectivity peptides. In this report, we examine role HLA-C defined inhibitory (KIR) cl42 with established HLA-Cw4. Binding soluble KIR HLA-Cw4 transporter associated presentation (TAP)-deficient RMA-S occurred only exogenous loading. Moreover, was certain substitutions at positions 7 8 nonamer QYDDAVYKL abolished Cw4 interaction despite similar surface expression HLA-C. direct between peptideloaded correlated they were inhibited loaded appropriate

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