Project description:Microarray time courses followed the response of 5 yeast strains to heat shock. Expression variation due to genetic, environmental, and genotype-by-environment interactions were identified. Keywords: Timecourse and single timepoint expression studies of stress response in yeast
Project description:Microarray time courses followed the response of 5 yeast strains to heat shock. Expression variation due to genetic, environmental, and genotype-by-environment interactions were identified. Keywords: Timecourse and single timepoint expression studies of stress response in yeast The genomic expression response to heat shock was measured in 5 different yeast strains over the course of 2 hours. Basal expression at 25C was also compared in 4 non-lab strains to the S288c refernce. All experiments were done in duplicate, for a total of 68 Samples.
Project description:To gain deep understanding of yeast cell response to heat stress, multiple laboratory strains have been intensively studied by genome-wide expression analysis for mechanistic dissection of classical heat shock response. However, robust industrial strains of S. cerevisiae have hardly been explored in global analysis for elucidating the mechanism of thermotolerant response (TR) during fermentation. Herein, we employed DIA/SWATH–based proteomic workflows to characterize proteome remodeling of an industrial strain ScY01 responding to prolonged thermal stress or transient heat shock.
Project description:To understand the extent that Heat shock protein 90 (Hsp90) regulated its target proteins at the transcription level, transcriptomic change was profiled in yeast cells upon Hsp90 compromising. We genetically modified the R1158 strain (resulting genotype of mutant strain: TETp-HSC82 hsp82Δ arg4Δ lys5Δ car2Δ::URA3) and then reduced the Hsp90 amount with doxycycline treatment. Fold change of mRNA from untreated to treated cells indicated the transcriptomic change. Totally, we identified 1104 genes mis-regulated with a fold change of no less than 1.5 (P <0.05) upon Hsp90 compromising.
Project description:Background: Recent studies have demonstrated that antisense transcription is pervasive in budding yeasts and is conserved between Saccharomyces cerevisiae and S. paradoxus. While studies have examined antisense transcripts of S. cerevisiae for inverse transcription in stationary phase and stress conditions, there is a lack of comprehensive analysis of the conditional specific evolutionary characteristics of antisense transcription between yeasts. Here we attempt to decipher the evolutionary relationship of antisense transcription of S. cerevisiae and S. paradoxus cultured in mid log, early stationary phase, and heat shock conditions. Results: Massively parallel sequencing of sequence strand-specific cDNA library was performed from RNA isolated from S. cerevisiae and S. paradoxus cells at mid log, stationary phase and heat shock conditions. We performed this analysis using a stringent set of sense ORF transcripts and non-coding antisense transcripts that were expressed in all the three conditions, as well as in both species. We found the divergence of the condition specific anti-sense transcription levels is higher than that in condition specific sense transcription levels, suggesting that antisense transcription played a potential role in adapting to different conditions. Furthermore, 43% of sense-antisense pairs demonstrated inverse transcription in either stationary phase or heat shock conditions relative to the mid log conditions. In addition, a large part of sense-antisense pairs (67%), which demonstrated inverse transcription, were highly conserved between the two species. Our results were also concordant with known functional analyses from previous studies and with the evidence from mechanistic experiments of role of individual genes. Conclusions: This study provides a comprehensive picture of the role of antisense transcription mediating sense transcription in different conditions across yeast species. We can conclude from our findings that antisense regulation could act like an on-off switch on sense regulation in different conditions. Transcriptomes of two yeast species under mid-log phase, early stationary phase, and after heat shock treatment were generated by Illumina HiSeq 2000 paired-end sequencing
Project description:We quantified the exact RNA binding sites of the Ssd1 protein in Saccharomyces cerevisiae, in exponential growth and heat shock conditions, using the CRAC protocol. We used a His-TEV-protein A tag (HTP) on the C-terminal of the genomic copy of Ssd1, with the 3'UTR replaced by the 3'UTR/terminator from the K. lactis Ssd1 homolog, followed by a KlURA3 selection marker.
