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Related Experiment Videos

[Structure and function of RAD51 gene in eukaryote]

A Shinohara1, H Ogawa, T Ogawa

  • 1Department of Biology, Osaka University, Faculty of Science.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|January 1, 1995
PubMed
Summary

The RAD51 gene in yeast is crucial for DNA repair and recombination. Its protein product, Rad51, shares structural similarities with bacterial RecA and is conserved across species, highlighting its essential role in DNA maintenance.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • The RAD51 gene in Saccharomyces cerevisiae (yeast) plays a vital role in DNA repair, particularly for double-strand breaks.
  • It is also involved in both mitotic and meiotic recombination processes.
  • The Rad51 protein exhibits structural similarities to bacterial RecA proteins, known for their critical functions in recombination and DNA repair.

Purpose of the Study:

  • To investigate the role and conservation of the RAD51 gene and its protein product in DNA repair and recombination.
  • To compare the structural and functional aspects of Rad51 with bacterial RecA.
  • To understand the protein interactions necessary for Rad51-mediated recombination.

Main Methods:

  • Gene cloning and characterization of RAD51 homologs from various organisms.

Related Experiment Videos

  • Structural analysis of Rad51 protein and its nucleofilament formation with DNA.
  • Biochemical assays to study protein-protein interactions, specifically between Rad51 and Rad52.

    • Main Results:

    • Rad51 protein forms a right-handed helical nucleofilament with DNA, extending it by 1.5 times compared to B-form DNA.
    • Structural homologs of Rad51 have been successfully cloned from diverse organisms, including humans and mice.
    • Unlike RecA, Rad51 requires the accessory protein Rad52 for efficient recombination, mediated by their interaction.

    Conclusions:

    • RAD51 is an essential gene for DNA repair and recombination, conserved from yeast to humans.
    • The structural similarity between Rad51 and RecA suggests a conserved mechanism for DNA strand exchange.
    • The interaction with Rad52 is a key distinguishing feature of eukaryotic Rad51 function in recombination.