DNA Sequence Analysis of Spontaneous Mutagenesis in Saccharomyces cerevisiae

Corresponding author: Bernard A. Kunz, School of Biological and Chemical Sciences, Deakin University, Geelong, Victoria, 3217 Australia, bkunz{at}deakin.edu.au (E-mail).

To help elucidate the mechanisms involved in spontaneous mutagenesis, DNA sequencing has been applied to characterize the types of mutation whose rates are increased or decreased in mutator or antimutator strains, respectively. Increased spontaneous mutation rates point to malfunctions in genes that normally act to reduce spontaneous mutation, whereas decreased rates are associated with defects in genes whose products are necessary for spontaneous mutagenesis. In this article, we survey and discuss the mutational specificities conferred by mutator and antimutator genes in the budding yeast Saccharomyces cerevisiae. The implications of selected aspects of the data are considered with respect to the mechanisms of spontaneous mutagenesis.

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