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Related Experiment Videos

Antigen receptors on B lymphocytes.

M Reth1

  • 1Max-Planck-Institut für Immunobiologie, Freiberg, Germany.

Annual Review of Immunology
|January 1, 1992
PubMed
Summary

The B cell antigen receptor is a complex structure, similar to the T cell receptor. Its cross-linking triggers tyrosine phosphorylation, suggesting it

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • The B cell antigen receptor (BCR) is crucial for adaptive immunity.
  • Recent structural studies reveal the BCR is a multicomponent complex.
  • Its structure shares similarities with the T cell antigen receptor (TCR).

Purpose of the Study:

  • To elucidate the structural composition of the B cell antigen receptor.
  • To understand the signaling mechanisms initiated upon BCR activation.
  • To classify the BCR within known receptor families.

Main Methods:

  • Structural analysis of the BCR complex.
  • Biochemical assays to study protein associations.
  • Investigating signaling events following receptor cross-linking.

Main Results:

  • The BCR comprises immunoglobulin molecules noncovalently linked to novel transmembrane proteins.
  • The BCR complex exhibits structural parallels with the TCR complex.
  • BCR cross-linking induces rapid tyrosine phosphorylation of downstream substrates.

Conclusions:

  • The B cell antigen receptor is a multicomponent complex.
  • The BCR signaling pathway involves tyrosine phosphorylation.
  • The BCR may belong to a tyrosine kinase receptor subgroup associated with src-like kinases.

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