A DNA replication mutant of yeast, cdc8, was found to decrease UV-induced reversion of lys2-1, arg4-17, tyr1 and ura1. This effect was observed with all three alleles of cdc8 tested. Survival curves obtained following UV irradiation in cdc8 rad double mutants show that cdc8 is epistatic to rad6, as
Induction of “General Control” and thermotolerance in cdc mutants of Saccharomyces cerevisiae
✍ Scribed by Messenguy, Francine ;Scherens, Bart
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 742 KB
- Volume
- 224
- Category
- Article
- ISSN
- 0026-8925
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✦ Synopsis
In Saccharomyces cerevisiae starvation for a single amino acid activates the transcription of a set of genes belonging to different amino acid biosynthetic pathways (General Control, GC). We show that mutants affected in GC regulation are also affected in their response to thermal stress. Moreover, growth conditions that are known to induce heat shock proteins induce the GC response. However, unlike heat shock proteins, the transcriptional activator of GC, GCN4, is not induced after a short exposure to heat, and in gcn mutant strains induction of heat resistance is normal.
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