Reference: Siede W, et al. (1983) Analysis of mutagenic DNA repair in a thermoconditional repair mutant of Saccharomyces cerevisiae. II. Influence of cycloheximide on UV-irradiated exponentially growing rev2ts cells. Mol Gen Genet 190(3):413-6

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Abstract


The time course of REV2 dependent recovery from prelethal UV damage and UV-induced locus-specific reversion of the his5-2 allele was determined in temperature-shift experiments by use of a thermoconditional allele of the rev2 gene (rad5-8, rev2ts). In UV-irradiated, exponentially growing rev2ts cells the REV2 dependent repair activity persists for up to 8 h at permissive temperature (23 degrees C), while the REV2 dependent mutagenic process is mostly completed within 2 h. The REV2 dependent process in exponentially growing cells is highly impaired by inhibition of protein synthesis. However, a REV2 dependent repair activity independent of de novo synthesis is detectable, even in the presence of up to 200 micrograms/ml cycloheximide, a response not found in stationary phase cells. Thus, the REV2 dependent process seems to be partially constitutive in exponentially growing cells. Additionally, exponentially growing rev2ts cells were considerably more UV-sensitive at restrictive temperature (36 degrees C) than were stationary phase cells.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Siede W, Eckardt F, Brendel M
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