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Related Experiment Videos

The chicken CD4 gene has remained conserved in evolution.

Riitta Koskinen1, Jan Salomonsen, Clive A Tregaskes

  • 1Department of Medical Microbiology, University of Turku, Kiinamyllynkatu 13, 20520 Turku, Finland. riheko@utu.fi

Immunogenetics
|October 22, 2002
PubMed
Summary

Researchers characterized chicken CD4, a crucial protein in immunity and cell development. Its gene structure and chromosomal location are conserved across species, offering evolutionary insights.

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Area of Science:

  • Immunology
  • Genetics
  • Molecular Biology

Background:

  • CD4 is essential for T-cell development and immune responses.
  • Understanding CD4 gene organization provides insights into immune system evolution.

Purpose of the Study:

  • To isolate and analyze the chicken CD4 gene.
  • To investigate the evolutionary conservation of CD4 structure and function.

Main Methods:

  • Gene isolation and analysis
  • 5'RACE for transcription start sites
  • Single-strand conformation polymorphism (SSCP) for gene mapping

Main Results:

  • Chicken CD4 gene spans 11.5 kb with ten exons.
  • A TATA-less promoter with two transcription start sites was identified.

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  • The gene is located on chicken Chromosome 1, showing conserved synteny with mouse and human.

    • Conclusions:

    • Chicken CD4 gene organization and regulatory elements are conserved evolutionarily.
    • This study provides the first description of CD4 organization in a non-mammalian species.