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Trends Biochem Sci. 2018 Feb;43(2):108-123. doi: 10.1016/j.tibs.2017.11.008. Epub 2017 Dec 18.

TCR Signaling: Mechanisms of Initiation and Propagation.

Author information

1
Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA; Howard Hughes Medical Institute (HHMI), San Francisco, CA 94143, USA.
2
Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA; Howard Hughes Medical Institute (HHMI), San Francisco, CA 94143, USA. Electronic address: aweiss@medicine.ucsf.edu.

Abstract

The mechanisms by which a T cell detects antigen using its T cell antigen receptor (TCR) are crucial to our understanding of immunity and the harnessing of T cells therapeutically. A hallmark of the T cell response is the ability of T cells to quantitatively respond to antigenic ligands derived from pathogens while remaining inert to similar ligands derived from host tissues. Recent studies have revealed exciting properties of the TCR and the behaviors of its signaling effectors that are used to detect and discriminate between antigens. Here we highlight these recent findings, focusing on the proximal TCR signaling molecules Zap70, Lck, and LAT, to provide mechanistic models and insights into the exquisite sensitivity and specificity of the TCR.

KEYWORDS:

T cell; TCR; antigen; kinase; phosphatase; signaling

PMID:
29269020
PMCID:
PMC5801066
DOI:
10.1016/j.tibs.2017.11.008
[Indexed for MEDLINE]
Free PMC Article

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