Within eukaryotes, tolerance to DNA damage is determined primarily by the repair pathway controlled by the members of the RAD6 epistasis group. Genetic studies on a yeast Saccharomyces cerevisiae model showed that the initial stage of postreplication repair (PRR), i.e., initiation of replication through DNA damage, is controlled by Rad6–Rad18 ubiquitin-conjugating enzyme complex. Mutants of these genes are highly sensitive to various genotoxic agents and reduce the level of induced mutagenesis. In this case, the efficiency of mutagenesis suppression depends on the type of damage. In this study we showed that DNA damage induced by hydrogen peroxide at the same mutagen doses causes significantly more mutations and lethal events in the rad18 mutant cells compared to control wild-type cells.
Russian Journal of Genetics – Springer Journals
Published: Apr 26, 2012
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