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Related Experiment Videos

Sheep MHC class II molecules. I. Immunochemical characterization.

N K Puri1, M D Gorrell, M R Brandon

  • 1Department of Veterinary Preclinical Sciences, University of Melbourne, Parkville, Victoria, Australia.

Immunology
|December 1, 1987
PubMed
Summary

Sheep class II molecules exhibit unique structural and glycosylation properties compared to human and mouse counterparts. Their alpha and beta chains rapidly associate and glycosylate during synthesis, forming complex oligosaccharides.

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Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Protein Chemistry

Background:

  • Class II molecules are crucial for immune responses.
  • Understanding sheep class II molecule structure is vital for comparative immunology.

Purpose of the Study:

  • To investigate the physicochemical properties, biosynthesis, and glycosylation of sheep class II molecules.
  • To characterize the structural differences between sheep, mouse, and human class II molecules.

Main Methods:

  • Utilized a panel of seven monoclonal antibodies for epitope mapping.
  • Employed SDS-PAGE and pulse-chase analyses to study molecular structure and synthesis.
  • Investigated glycosylation patterns of alpha and beta polypeptides.

Main Results:

Related Experiment Videos

  • Sheep class II molecules showed instability in SDS and unique polypeptide behavior upon reduction.
  • Alpha and beta polypeptides rapidly associated and underwent glycosylation during synthesis.
  • Sheep class II molecules possess N-linked oligosaccharides exclusively of the complex or sialylated type, differing from human class II.

Conclusions:

  • Sheep class II molecules possess distinct structural and glycosylation characteristics.
  • These findings provide insights into the evolutionary variations of MHC class II molecules.
  • The unique features may influence antigen presentation and immune response in sheep.