Revisiting the putative TCR Cα dimerization model through structural analysis.
Revisiting the putative TCR Cα dimerization model through structural analysis.
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DOI:
10.3389/fimmu.2013.00016
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发表时间:
2013
影响因子:
7.3
通讯作者:
Reinherz EL
中科院分区:
文献类型:
--
作者:
Wang JH;Reinherz EL
Despite major advances in T cell receptor (TCR) biology and structure, how peptide–MHC complex (pMHC) ligands trigger αβ TCR activation remains unresolved. Two views exist. One model postulates that monomeric TCR–pMHC ligation events are sufficient while a second proposes that TCR–TCR dimerization in cis via Cα domain interaction plus pMHC binding is critical. We scrutinized 22 known TCR/pMHC complex crystal structures, and did not find any predicted molecular Cα–Cα contacts in these crystals that would allow for physiological TCR dimerization. Moreover, the presence of conserved glycan adducts on the outer face of the Cα domain preclude the hypothesized TCR dimerization through the Cα domain. Observed functional consequences of Cα mutations are likely indirect, with TCR microclusters at the immunological synapse driven by TCR transmembrane/cytoplasmic interactions via signaling molecules, scaffold proteins, and/or cytoskeletal elements.
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DOI:
10.1074/jbc.m111.332783
发表时间:
2012-04-13
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Fernandes RA;Shore DA;Vuong MT;Yu C;Zhu X;Pereira-Lopes S;Brouwer H;Fennelly JA;Jessup CM;Evans EJ;Wilson IA;Davis SJ
通讯作者:
Davis SJ
影响因子:
3.4
作者:
Judokusumo, Edward;Tabdanov, Erdem;Kam, Lance C.
通讯作者:
Kam, Lance C.
影响因子:
4.8
作者:
Kim, Sun Taek;Takeuchi, Koh;Reinherz, Ellis L.
通讯作者:
Reinherz, Ellis L.
影响因子:
32.4
作者:
Boniface, JJ;Rabinowitz, JD;Davis, MM
通讯作者:
Davis, MM
影响因子:
7.3
作者:
Kim ST;Shin Y;Brazin K;Mallis RJ;Sun ZY;Wagner G;Lang MJ;Reinherz EL
通讯作者:
Reinherz EL