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Related Experiment Videos

Structure and expression of ovine complement receptor type 2.

A J Young1, L Dudler, K Yamaguchi

  • 1Basel Institute for Immunology, Switzerland.

Veterinary Immunology and Immunopathology
|December 30, 1999
PubMed
Summary
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Sheep complement receptor type 2 (CR2) exhibits an unusual higher-order structure and exists in two isoforms. Differential CR2 expression on B-cells may indicate distinct developmental pathways or antigen exposure phases.

Area of Science:

  • Immunology
  • Molecular Biology
  • Structural Biology

Background:

  • Complement receptor type 2 (CR2) plays a crucial role in the immune system.
  • Understanding CR2 structure and expression is vital for B-cell biology.

Purpose of the Study:

  • To characterize the structure and expression of sheep complement receptor type 2 (CR2).
  • To investigate the functional implications of CR2 heterogeneity in sheep B-cells.

Main Methods:

  • cDNA cloning
  • Protein sequencing
  • Immunoprecipitation

Main Results:

  • Sheep CR2 shares primary structure similarity with mammalian homologues but has an unusual higher-order structure.

Related Experiment Videos

  • Two CR2 isoforms were identified: one ubiquitinated in the cytoplasmic domain.
  • CR2 isoforms exist as non-covalently associated dimers on the cell surface.
  • CR2 expression on sheep B-cells varies with development and body compartment.
  • CR2+ and CR2- B-cell subsets display distinct surface marker expression and functional properties.

    • Conclusions:

    • Differential CR2 expression may distinguish B-cells from alternative developmental pathways.
    • CR2 expression patterns could serve as a marker for B-cells in different antigen exposure phases.