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An evolutionary and structural perspective on T cell antigen receptor function.

Bernard Malissen1

  • 1Centre d'Immunologie INSERM-CNRS de Marseille-Luminy, Marseille, France. bernardm@ciml.univ-mrs.fr

Immunological Reviews
|March 5, 2003
PubMed
Summary
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This study examines how the T cell antigen receptor (TCR) signals ligand binding. It explores information transfer from the TCR's binding site to its signaling components using structural data.

Area of Science:

  • Immunology
  • Molecular Biology
  • Structural Biology

Background:

  • Receptors with immunoreceptor tyrosine-based activation motifs (ITAMs) play crucial roles in immune signaling.
  • The T cell antigen receptor (TCR) is a key ITAM-containing receptor essential for adaptive immunity.
  • Understanding TCR signaling is vital for developing immunotherapies.

Purpose of the Study:

  • To elucidate the mechanisms by which the TCR transmits information about ligand binding.
  • To analyze how the state and quality of ligand occupancy at the TCR binding site are communicated.
  • To integrate recent structural data into models of TCR signal transduction.

Main Methods:

  • Review of existing literature on ITAM-containing receptors.
  • Analysis of recent structural data of TCR ligand-binding subunits.

Related Experiment Videos

  • Revisiting models of TCR signal transduction pathways.

    • Main Results:

    • Structural insights reveal how ligand binding alters the TCR conformation.
    • Information regarding the extent and nature of TCR occupancy is effectively relayed.
    • This relay is mediated through conformational changes transmitted to proximal signaling components.

    Conclusions:

    • The study provides a refined understanding of TCR signal initiation.
    • Structural data are key to deciphering the allosteric mechanisms of TCR signaling.
    • This knowledge can inform the design of TCR-based therapeutics.