Reference: Datta A, et al. (2000) Checkpoint-dependent activation of mutagenic repair in Saccharomyces cerevisiae pol3-01 mutants. Mol Cell 6(3):593-603

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Abstract


The Saccharomyces cerevisiae DNA polymerase delta proofreading exonuclease-defective mutation pol3-01 is known to cause high rates of accumulating mutations. The pol3-01 mutant was found to have abnormal cell cycle progression due to activation of the S phase checkpoint. Inactivation of the S phase checkpoint suppressed both the pol3-01 cell cycle progression defect and mutator phenotype, indicating that the pol3-01 mutator phenotype was dependent on the S phase damage checkpoint pathway. Epistasis analysis suggested that a portion of the pol3-01 mutator phenotype involves members of the RAD6 epistasis group that function in both error-free and error-prone repair. These results indicate that activation of a checkpoint in response to certain types of replicative defects can result in the accumulation of mutations.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
Authors
Datta A, Schmeits JL, Amin NS, Lau PJ, Myung K, Kolodner RD
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