The discriminatory power of the T cell receptor.
The discriminatory power of the T cell receptor.
复制标题
T细胞受体的歧视能力。
DOI:
10.7554/elife.67092
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发表时间:
2021-05-25
期刊:
影响因子:
7.7
通讯作者:
Dushek O
中科院分区:
文献类型:
--
作者:
Pettmann J;Huhn A;Abu Shah E;Kutuzov MA;Wilson DB;Dustin ML;Davis SJ;van der Merwe PA;Dushek O
T cells use their T cell receptors (TCRs) to discriminate between lower-affinity self and higher-affinity non-self peptides presented on major histocompatibility complex (pMHC) antigens. Although the discriminatory power of the TCR is widely believed to be near-perfect, technical difficulties have hampered efforts to precisely quantify it. Here, we describe a method for measuring very low TCR/pMHC affinities and use it to measure the discriminatory power of the TCR and the factors affecting it. We find that TCR discrimination, although enhanced compared with conventional cell-surface receptors, is imperfect: primary human T cells can respond to pMHC with affinities as low as KD ∼ 1 mM. The kinetic proofreading mechanism fit our data, providing the first estimates of both the time delay (2.8 s) and number of biochemical steps (2.67) that are consistent with the extraordinary sensitivity of antigen recognition. Our findings explain why self pMHC frequently induce autoimmune diseases and anti-tumour responses, and suggest ways to modify TCR discrimination.
影响因子:
3.6
作者:
Persaud SP;Donermeyer DL;Weber KS;Kranz DM;Allen PM
通讯作者:
Allen PM
DOI:
10.4049/jimmunol.1003755
发表时间:
2011-05-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Stone JD;Aggen DH;Chervin AS;Narayanan S;Schmitt TM;Greenberg PD;Kranz DM
通讯作者:
Kranz DM
DOI:
10.4049/jimmunol.0900054
发表时间:
2009-07-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Chervin AS;Stone JD;Holler PD;Bai A;Chen J;Eisen HN;Kranz DM
通讯作者:
Kranz DM