Signal transduction mediated by the T cell antigen receptor: the role of adapter proteins

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Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries
08:49

Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries

Published on: January 22, 2019

Lawrence E Samelson1

  • 1Laboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Drive, Building 37, Room 1E24, Bethesda, Maryland, 20892-4255, USA. samelson@helix.nih.gov

Annual Review of Immunology
|February 28, 2002
PubMed

Insights

T cell receptor (TCR) engagement activates protein tyrosine kinases (PTKs). These kinases phosphorylate adapter proteins, crucial for T cell activation, effector function, and cytoskeleton control.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • T cell receptor (TCR) engagement initiates complex signaling cascades.
  • Protein tyrosine kinases (PTKs) are early key players in TCR signaling.
  • Adapter proteins act as crucial scaffolds in these signaling pathways.

Purpose of the Study:

  • To review critical substrates of PTKs in T cell activation.
  • To discuss the role of adapter proteins in T cell signaling.
  • To explore how adapter proteins influence T cell effector functions.

Main Methods:

  • Review of existing literature on T cell signaling pathways.
  • Analysis of the function of protein tyrosine kinases (PTKs).
  • Examination of adapter protein interactions and their downstream effects.

Main Results:

  • Identified critical PTK substrates and adapter proteins in TCR signaling.
  • Demonstrated that phosphorylated adapter proteins serve as binding sites for effector enzymes.
  • Highlighted the role of adapter proteins in T cell activation and cytoskeleton regulation.

Conclusions:

  • Adapter proteins are essential for propagating signals initiated by TCR engagement.
  • The interaction of adapter proteins with plasma membrane microdomains is critical for T cell function.
  • Adapter proteins play a significant role in controlling the T cell cytoskeleton, impacting effector functions.

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