Molecular coordination of alphabeta T-cell receptors and coreceptors CD8 and CD4 in their recognition of peptide-MHC ligands.
The interaction of the alphabeta T-cell receptor (TCR) with its ligand, peptide-MHC (pMHC), is enhanced by the recognition of the coreceptor CD8 or CD4 to the same pMHC in the immunological synapse. In the past few years, the coordination of these interactions at the molecular level has been revealed by analysis of their complex crystal structures and binding dynamics. Here we discuss the interactions of pMHC with the TCR and coreceptor CD8 or CD4 on the surfaces of alphabeta T cells and antigen presenting cells, and the implications for TCR signalling and the T-cell repertoire.
Nuffield Dept. of Clinical Medicine, John Radcliffe Hospital, University of Oxford, Headington, Oxford, UK. ggao@worf.molbiol.ox.ac.uk
George F
GF
Gao
Zihe
Z
Rao
John I
JI
Bell
D000818:Animals; D015704:CD4 Antigens / Q000737:chemistry* / Q000378:metabolism; D016827:CD8 Antigens / Q000737:chemistry* / Q000378:metabolism; D015395:Histocompatibility Antigens Class I / Q000737:chemistry / Q000378:metabolism*; D000949:Histocompatibility Antigens Class II / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D007700:Kinetics; D008024:Ligands; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000737:chemistry* / Q000378:metabolism
D015704:CD4 Antigens; D016827:CD8 Antigens; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D008024:Ligands; D016693:Receptors, Antigen, T-Cell, alpha-beta