Project description:Samples GSM206658-GSM206693: Acquired Stress resistance in S. cerevisiae: NaCl primary and H2O2 secondary Transcriptional timecourses of yeast cells exposed to 0.7M NaCl alone, 0.5mM H2O2 alone, or 0.5mM H2O2 following 0.7M NaCl, all compared to an unstressed sample. Repeated using msn2∆ strain. Samples GSM291156-GSM291196: Transcriptional response to stress in strains lacking MSN2 and/or MSN4 Transcriptional timecourses of yeast cells (WT, msn2∆, msn4∆, or msn2∆msn4∆) exposed to 0.7M NaCl for 45 minutes or 30-37˚C Heat Shift for 15 min compared to an unstressed sample of the same strain. Keywords: Stress Response
Project description:Saccharomyces cerevisiae strain BY4741 (MATa his3Δ1 leu2Δ0 met15Δ0 ura3Δ0) was grown in YPD medium. For control conditions, cells were grown in mid-log phase at 30°C for 20 min or 2 hours. Stress conditions were heat shock (37°C for 20 min), diauxic shift (harvested at 2 hours after glucose depletion), DNA damage (harvested after 2 hours of treatment with 5 µg/ml 4-nitroquinoline 1-oxide (Sigma)). Moreover, four conditions of the yeast metabolic cycle were analyzed. S. cerevisiae strain CEN.PK (MATa URA3 TRP1 LEU2 HIS3 MAL2-8C SUC2) was used and cultivated as described elsewhere (Nocetti and Whitehouse, Genes Dev, 2016). The period of metabolic oscillation was approximately 3.2 h. Cells were harvested at 16, 32, 48, and 60 min from the start of each cycle for one oxidative, two reductive/building, and one reductive/charging phase points. Total RNA from each sample was extracted by the hot phenol method and used for library preparation. 3′-seq libraries were prepared as described previously (Lianoglou et al., Genes Dev, 2013). Each condition was sequenced in three biological replicates. The 27 individual libraries were pooled and subjected to sequencing with HiSeq with SR50 at the Integrated Genomics Operation (MSKCC).
Project description:Oxidative stress is a harmful condition in a cell, tissue, or organ, caused by an imbalnace between reactive oxygen species and other oxidants and the capacity of antioxidant defense systems to remove them. The budding yeast S. cerevisiae has been the major eukaryotic model for studies of response to oxidative stress. We used microarrays to study the genome-wide temporal response of the yeast S. cerevisiae to oxidative stress induced by cumene hydroperoxide. Keywords: time course The effects of oxidative stress induced by CHP on the transcriptional profile of S. cerevisiae was studied from a dynamical perspective. Yeast cultures were grown in controlled batch conditions, in 1 L fermentors. Three replicate cultures in mid-exponential phase were exposed to 0.19 mM CHP, while three non-treated cultures were used as controls. Samples were collected at t=0 (immediately before adding CHP) and at 3, 6, 12 and 20 min after adding the oxidant. Samples were processed for RNA extraction and profiled using Affymetrix Yeast Genome S98 arrays.
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 conventional quantification of change in mRNA abundance. Experiment Overall Design: We used Affymetrix microarrays to quantify changes in mRNA abundance following oxidative stress (using hydrogen peroxide) and DNA damage stress (using methyl methanesulfonate) during a three-hour time course (0, 30 min, 60 min, 100 min, 140 min, 180 min).
Project description:Expression data from Saccharomyces cerevisiae BY4741 and BY4741hsp30Δ cells grown at 30°C and following exposure at 40°C for 30 min.
Project description:This SuperSeries is composed of the following subset Series: GSE18240: Saccharomyces cerevisiae cells: control vs positive supercoiling accumulation after 0, 30 and 120 min GSE18241: S. cerevisiae cells: control vs positive supercoiling accumulation in absence of telomere silencing after 0 and 120 min GSE18605: Saccharomyces cerevisiae cells: effect of Top2 depletion without accumulation of positive superhelical stress Refer to individual Series