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C2 reference typing report.

I Jahn1, B Uring-Lambert, D Arnold

  • 1Centre de Recherche en Hématologie et Immunologie, Strasbourg, France.

Complement and Inflammation
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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This study identified nine structural variants of complement C2 (complement component 2) protein, including common, uncommon, and rare acidic/basic types. Typing desialated C2 is crucial for identifying certain rare variants.

Area of Science:

  • Immunogenetics
  • Complement System Biology

Background:

  • The complement system is a crucial part of innate immunity.
  • Complement C2 (C2) exhibits genetic polymorphism, impacting its function.
  • Understanding C2 variants is essential for immunological studies.

Purpose of the Study:

  • To analyze the polymorphism of native, activated, and desialated C2.
  • To compare known and identify new C2 variants.
  • To establish the structural basis of C2 polymorphism.

Main Methods:

  • Isoelectric focusing (IEF) of C2.
  • Immunoblotting using a specific antihuman C2 antibody.
  • Analysis of samples from the VIth Complement Genetics Workshop.

Main Results:

Related Experiment Videos

  • Identified nine structural C2 variants at the protein level.
  • These include common (C2 C), less common (C2 B in Caucasoids), four rare acidic, and three rare basic variants.
  • The C2a fragment carries the polymorphic site for basic variants.

Conclusions:

  • Desialated C2 typing is necessary for accurate identification of rare acidic and basic variants.
  • Specific variants (e.g., C2 BH, C2 BJ) are difficult to detect in native C2.
  • This work refines the understanding of C2 genetic diversity.