Coupling the TCR to downstream signalling pathways: the role of cytoplasmic and transmembrane adaptor proteins

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Updated: Oct 18, 2026

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins
16:10

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins

Published on: March 22, 2012

A Marie-Cardine1, B Schraven

  • 1Immunomodulation Laboratory of the Institute for Immunology, Ruprecht-Karls University of Heidelberg, Germany.

Cellular Signalling
|November 26, 1999
PubMed

Insights

T-cell receptor (TCR) engagement activates protein kinases, initiating T-cell responses. Adaptor proteins are key to connecting the TCR to downstream signaling pathways like Ras and calcineurin, enabling T-cell activation and fine-tuning responses.

Area of Science:

  • Immunology
  • Cellular Signaling
  • Molecular Biology

Background:

  • T-cell receptor (TCR) engagement triggers intracellular signaling cascades essential for T-cell activation, proliferation, and differentiation.
  • TCR signaling involves the activation of cytoplasmic protein kinases and downstream pathways, including Ras and calcineurin, crucial for T-cell responses.
  • The precise molecular mechanisms linking TCR triggering to these intracellular effector pathways remain incompletely understood.

Purpose of the Study:

  • To elucidate the molecular mechanisms connecting T-cell receptor (TCR) engagement to downstream intracellular signaling pathways.
  • To investigate the role of novel cytoplasmic and transmembrane adaptor proteins in integrating TCR-mediated signals.
  • To understand how these adaptor proteins contribute to the fine-tuning of T-cell responses.

Main Methods:

  • Molecular characterization of novel cytoplasmic and transmembrane adaptor proteins.
  • Analysis of signal integration at the intracellular level following TCR engagement.
  • Investigating the role of adaptor proteins in T-cell activation and downstream signaling.

Main Results:

  • Identification and characterization of novel adaptor proteins involved in TCR signaling.
  • Demonstration that adaptor proteins integrate signals from the TCR at the intracellular level.
  • Evidence suggesting adaptor proteins play a role in fine-tuning T-cell proliferation and differentiation.

Conclusions:

  • Novel adaptor proteins are critical components in the T-cell receptor signaling pathway.
  • These adaptor proteins mediate the integration of TCR-initiated signals, connecting the receptor to key downstream effectors.
  • Adaptor proteins are essential for the precise regulation and fine-tuning of T-cell activation and immune responses.

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