Hyper-recombination and mutator effects of themms9-1,mms13-1, andmms21-1mutations inSaccharomyces cerevisiae
✍ Scribed by Beth A. Montelone; Satya Prakash; Louise Prakash
- Book ID
- 104768703
- Publisher
- Springer-Verlag
- Year
- 1981
- Tongue
- English
- Weight
- 874 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0172-8083
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✦ Synopsis
Spontaneous mitotic intragenic and intergenic recombination at various sites is enhanced 10 to 100 fold in the methyl methanesulfonate (MMS)-sensitive mutants mms9-1, mms13-1, and mms21-1 of Saccharomyces cerevisiae. All three mutants show elevated rates of spontaneous mutation. Sporulation is reduced in diploids homozygous for any of the three mutations, and a deficiency in meiotic recombination and meiotic chromosome segregation is observed. Pleiotropic effects on cell viability, growth rate, and radiation sensitivity, in combination with the alterations in recombination and mutagenesis displayed by mutant strains, suggest that the MMS9, MMS13, and MMS21 genes play important roles in DNA replication and/or genetic recombination.