Current Genetics

, Volume 23, Issue 1, pp 1–8

In-vitro recombination in rad and rnc mutants of Saccharomyces cerevisiae

  • Peter D. Moore
  • John R. Simon
  • Linda J. Wallace
  • Terry Y. -K. Chow
Original Articles


Extracts of S. cerevisiae cells can catalyze homologous recombination between plasmids in vitro. Extracts prepared from rad50, rad52 or rad54 disruption mutants all have reduced recombinational activity compared to wild-type. The rad52 and rad54 extracts are more impaired in the recombination of plasmids containing double-strand breaks than of intact plasmids, whereas rad50 extracts are deficient equally for both types of substrate. The nuclease RhoNuc (previously designated yNucR), encoded by the RNC1 (previously designated NUC2) gene and regulated by the RAD52 gene, is not required for recombination when one substrate is single-stranded but is essential for the majority of recombination events when both substrates are double-stranded. Furthermore, elimination of this nuclease restores recombination in rad52 extracts to levels comparable to those in wild-type extracts.

Key words

Recombination Yeast radmutants Endo/exonuclease 


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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Peter D. Moore
    • 1
  • John R. Simon
    • 1
  • Linda J. Wallace
    • 1
  • Terry Y. -K. Chow
    • 2
  1. 1.Department of Microbiology and ImmunologyUniversity of Illinois College of Medicine at ChicagoChicagoUSA
  2. 2.Department of Nuclear Medicine and Radiobiology, Faculty of MedicineUniversity of SherbrookeSherbrookeCanada
  3. 3.Department of GeneticsUniversity of Illinois, College of MedicineChicagoUSA
  4. 4.Department of Biological ChemistryUCLA School of MedicineLos AngelesUSA

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