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Current Genetics

, Volume 14, Issue 3, pp 211–223 | Cite as

A reexamination of the role of the RAD52 gene in spontaneous mitotic recombination

  • Robert E. Malone
  • Beth A. Montelone
  • Charles Edwards
  • Kevin Carney
  • Merl F. Hoekstra
Original Articles

Summary

The RAD52 gene is required for much of the recombination that occurs in Saccharomyces cerevisiae. One of the two commonly utilized mutant alleles, rad52-2, increases rather than reduces mitotic recombination, yet in other respects appears to be a typical rad52 mutant allele. This raises the question as to whether RAD52 is really necessary for mitotic recombination. Analysis of a deletion/insertion allele created in vitro indicates that the null mutant phenotype is indeed a deficiency in mitotic recombination, especially in gene conversion. The data also indicate that RAD52 is required for crossing-over between at least some chromosomes. Finally, examination of the behavior of a replicating plasmid in rad52-1 strains indicates that the frequency of plasmid integration is substantially reduced from that in wild type, a conclusion consistent with a role for RAD52 in reciprocal crossing-over. Analysis of recombinants arising in rad52-2 strains suggests that this allele may result in the increased activity of a RAD52-independent recombinational pathway.

Key words

Mitotic recombination DNA repair Yeast RAD52 

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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • Robert E. Malone
    • 1
  • Beth A. Montelone
    • 1
  • Charles Edwards
    • 2
  • Kevin Carney
    • 2
  • Merl F. Hoekstra
    • 3
  1. 1.Department of BiologyUniversity of IowaIowa CityUSA
  2. 2.Department of MicrobiologyLoyola University School of MedicineMaywoodUSA
  3. 3.Department of Molecular BiologyScripps Research InstituteLa JollaUSA

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