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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
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Related Experiment Video

Updated: Jun 9, 2026

Measuring TCR-pMHC Binding In Situ using a FRET-based Microscopy Assay
19:05

Measuring TCR-pMHC Binding In Situ using a FRET-based Microscopy Assay

Published on: October 30, 2015

Pre-clustered TCR complexes.

Eszter Molnár1, Sumit Deswal, Wolfgang W A Schamel

  • 1Department of Molecular Immunology, Max Planck-Institute of Immunobiology and Institute of Biology III, Faculty of Biology, University of Freiburg, Freiburg, Germany. molnar@immunbio.mpg.de

FEBS Letters
|September 11, 2010
PubMed
Summary
This summary is machine-generated.

T-cell antigen receptors (TCRs) are pre-clustered on cell surfaces before antigen binding, challenging the classical view. This review explores evidence, activation mechanisms, and functional consequences of TCR pre-clustering for T-cell activation.

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Published on: September 10, 2017

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19:05

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Simultaneous Quantification of T-Cell Receptor Excision Circles (TRECs) and K-Deleting Recombination Excision Circles (KRECs) by Real-time PCR
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11:21

Streamlined Single Cell TCR Isolation and Generation of Retroviral Vectors for In Vitro and In Vivo Expression of Human TCRs

Published on: September 10, 2017

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • The T-cell antigen receptor (TCR) complex mediates T-cell activation.
  • The classical model posits random TCR distribution until antigen binding.
  • Emerging evidence suggests TCRs exist in pre-clustered states.

Purpose of the Study:

  • To review experimental evidence for pre-clustered TCRs.
  • To investigate the activation mechanisms of TCR pre-clusters.
  • To explore the functional consequences of TCR pre-clustering on T-cell activation.

Main Methods:

  • Review of existing literature and experimental data.
  • Analysis of various techniques used to study TCR distribution.
  • Synthesis of findings on TCR clustering and T-cell signaling.

Main Results:

  • Multiple studies provide evidence for pre-existing TCR clusters.
  • Antigen binding can trigger activation of these pre-clustered TCRs.
  • TCR pre-clustering influences T-cell activation dynamics.

Conclusions:

  • TCR pre-clustering represents a significant departure from the classical model.
  • Understanding TCR pre-clustering is crucial for comprehending T-cell activation.
  • Further research is needed to fully elucidate the mechanisms and implications of TCR pre-clustering.