Project description:For each strain two time courses for mRNA abundance: Oxidative and MMS and two time courses for decay: reference decay and following oxidative stress We used Affymetrix microarrays to quantify changes in mRNA abundance following oxidative stress and DNA damage stress and also decay following transcription inhibition with and without oxidative stress. Each of the experiments were done for both strains 211 (wt) and 212 (mutant)
Project description:We subjected yeast to two stresses, oxidative stress, which under current settings induces a fast and transient response in mRNA abundance, and DNA damage, which triggers a slow enduring response. Using microarrays, we performed a transcriptional arrest experiment to measure genome-wide mRNA decay profiles under each condition. Genome-wide decay kinetics in each condition were compared to decay experiments that were performed in a reference condition (only transcription inhibition without an additional stress) to quantify changes in mRNA stability in each condition. We found condition-specific changes in mRNA decay rates and coordination between mRNA production and degradation. In the transient response, most induced genes were surprisingly destabilized, while repressed genes were somewhat stabilized, exhibiting counteraction between production and degradation. This strategy can reconcile high steady-state level with short response time among induced genes. In contrast, the stress that induces the slow response displays the more expected behavior, whereby most induced genes are stabilized, and repressed genes destabilized. Our results show genome-wide interplay between mRNA production and degradation, and that alternative modes of such interplay determine the kinetics of the transcriptome in response to stress. Keywords: Four separate time courses
Project description:Purpose: The goal of this study was to globally characterize the transcript levels of genes in Saccharomyces cerevisiae WT and set4∆ strains during hypoxia. Using transcriptome profiling of isogenic WT and set4∆ strains grown under aerobic or 8 hours of hypoxia. We analyzed the changes in gene expression that occur during aerobic and hypoxic conditions and identified sets of upregulated and downregulated gene expression.
Project description:We used RNA-Seq to measure transcript abundance in 15 Saccharomyces cerevisiae strains from a diverse range of genetic lineages when growing in rich media (YPD) to characterize differential expression across strains.
