Crystal structure of a gammadelta T cell receptor ligand T22: a truncated MHC-like fold.Wingren, C., Crowley, M.P., Degano, M., Chien, Y., Wilson, I.A.
(2000) Science 287: 310-314
- PubMed: 10634787
- DOI: https://doi.org/10.1126/science.287.5451.310
- Primary Citation of Related Structures:
- PubMed Abstract:
Murine T10 and T22 are highly related nonclassical major histocompatibility complex (MHC) class Ib proteins that bind to certain gammadelta T cell receptors (TCRs) in the absence of other components. The crystal structure of T22b at 3.1 angstroms reveals similarities to MHC class I molecules, but one side of the normal peptide-binding groove is severely truncated, which allows direct access to the beta-sheet floor. Potential gammadelta TCR-binding sites can be inferred from functional mapping of T10 and T22 point mutants and allelic variants. Thus, T22 represents an unusual variant of the MHC-like fold and indicates that gammadelta and alphabeta TCRs interact differently with their respective MHC ligands.
Department of Molecular Biology and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.