Abstract:In this study, we present an allosteric mechanism for T cell receptor (TCR) triggering upon binding a peptide-MHC complex (pMHC), in which a conformational change in the TCR upon pMHC binding controls the mobility of the CD3 proteins. We found that the TCRβ FG loop serves as a gatekeeper, preventing accidental triggering, while the connecting peptide acts as a hinge for essential conformational changes in the TCR. Atomistic simulations and cell-based experiments with genetically modified connecting peptides de… Show more
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