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Recombination and mutagenesis in rad6 mutants of Saccharomyces cerevisiae: Evidence for multiple functions of the RAD6 gene

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Summary

The rad6-1 and rad6-3 mutants are highly UV sensitive and show an increase in spontaneous and UV induced mitotic heteroallelic recombination in diploids. Both rad6 mutants are proficient in spontaneous and UV induced unequal sister chromatid recombination in the reiterated ribosomal DNA sequence and are deficient in UV induced mutagenesis. In contrast to the above effects where both mutants appear similar, rad6-1 mutants are deficient in sporulation and meiotic recombination whereas rad6-3 mutants are proficient. The differential effects of these mutations indicate that the RAD6 gene is multifunctional. The possible role of the RAD6 gene in error prone excision repair of UV damage during the G1 phase of the cell cycle in addition to its role in postreplication repair is discussed.

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Authors and Affiliations

  1. Department of Biology, University of Rochester, 14627, Rochester, New York, USA

    Beth A. Montelone & Satya Prakash

  2. Department of Radiation Biology and Biophysics, School of Medicine, University of Rochester, 14642, Rochester, New York, USA

    Louise Prakash

Authors
  1. Beth A. Montelone
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  2. Satya Prakash
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  3. Louise Prakash
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Communicated by Ch. Auerbach

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Montelone, B.A., Prakash, S. & Prakash, L. Recombination and mutagenesis in rad6 mutants of Saccharomyces cerevisiae: Evidence for multiple functions of the RAD6 gene. Mol Gen Genet 184, 410–415 (1981). https://doi.org/10.1007/BF00352514

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  • DOI: https://doi.org/10.1007/BF00352514

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