An Engineered T Cell Receptor Variant Realizes the Limits of Functional Binding Modes.
An Engineered T Cell Receptor Variant Realizes the Limits of Functional Binding Modes.
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DOI:
10.1021/acs.biochem.0c00689
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发表时间:
2020-11-03
期刊:
影响因子:
2.9
通讯作者:
Baker BM
中科院分区:
文献类型:
--
作者:
Singh NK;Alonso JA;Harris DT;Anderson SD;Ma J;Hellman LM;Rosenberg AM;Kolawole EM;Evavold BD;Kranz DM;Baker BM
T cell receptors (TCRs) orchestrate cellular immunity by recognizing peptides presented by a range of major histocompatibility complex (MHC) proteins. Naturally occurring TCRs bind the composite peptide/MHC surface, recognizing peptides that are structurally and chemically compatible with the TCR binding site. Here we describe a molecularly evolved TCR variant that binds the human class I MHC protein HLA-A2 independent of the bound peptide, achieved by a drastic perturbation of the TCR binding geometry that places the molecule far away from the peptide binding groove. This unique geometry is unsupportive of normal T cell signaling. A substantial divergence between affinity measurements in solution and in two dimensions between proximal cell membranes leads us to attribute the lack of signaling to steric hindrance that limits binding in the confines of a cell-cell interface. Our results provide an example of how receptor binding geometry can impact T cell function and provide further support for the view that germline-encoded residues in TCR binding loops evolved to drive productive TCR recognition and signaling.
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DOI:
10.4049/jimmunol.1700236
发表时间:
2018-02-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Harris DT;Hager MV;Smith SN;Cai Q;Stone JD;Kruger P;Lever M;Dushek O;Schmitt TM;Greenberg PD;Kranz DM
通讯作者:
Kranz DM
影响因子:
32.4
作者:
Adams JJ;Narayanan S;Liu B;Birnbaum ME;Kruse AC;Bowerman NA;Chen W;Levin AM;Connolly JM;Zhu C;Kranz DM;Garcia KC
通讯作者:
Garcia KC
影响因子:
5.7
作者:
Harris, Daniel T.;Singh, Nishant K.;Baker, Brian M.
通讯作者:
Baker, Brian M.
影响因子:
48
作者:
Fowler, Douglas M.;Fields, Stanley
通讯作者:
Fields, Stanley
影响因子:
4.4
作者:
Hawse, William F.;Champion, Matthew M.;Baker, Brian M.
通讯作者:
Baker, Brian M.