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Reference: Grossmann KF, et al. (2000) Saccharomyces cerevisiae lacking Snm1, Rev3 or Rad51 have a normal S-phase but arrest permanently in G2 after cisplatin treatment. Mutat Res 461(1):1-13

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Abstract

The role of Snm1, Rev3 and Rad51 in S-phase after cisplatin (CDDP) DNA treatment has been examined. When isogenic deletion mutants snm1 delta, rev3 delta and rad51 delta were arrested in G1 and treated with doses of CDDP causing significant lethality (<20% survival in the mutant strains), they progressed through S-phase with normal kinetics. The mutants arrested in G2 like wild-type cells, however they did not exit the arrest and reenter the cell cycle. This finding demonstrates that these genes are not required to allow DNA replication in the presence of damage. Therefore, Snm1, Rev3 and Rad51 may act after S to allow repair. At high levels of damage (<40% survival in wild-type cells) S-phase was slowed in a MEC1-dependent fashion. The cross-link incision kinetics of snm1 delta and rev3 delta mutants were also examined; both showed no deficiencies in incision of cross-linked DNA.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S. | Comparative Study
Authors
Grossmann KF, Ward AM, Moses RE
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