Saccharomyces cerevisiae
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA123721 | ENA |
REPOSITORIES: ENA
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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
2009-12-01 | E-GEOD-18242 | biostudies-arrayexpress
Project description:Saccharomyces cerevisiae is an excellent microorganism for industrial succinic acid production, but high succinic acid concentration will inhibit the growth of Saccharomyces cerevisiae then reduce the production of succinic acid. Through analysis the transcriptomic data of Saccharomyces cerevisiae with different genetic backgrounds under different succinic acid stress, we hope to find the response mechanism of Saccharomyces cerevisiae to succinic acid.
2022-01-09 | GSE193190 | GEO
Project description:Industrial bioethanol production may involve a low pH environment,improving the tolerance of S. cerevisiae to a low pH environment caused by inorganic acids may be of industrial importance to control bacterial contamination, increase ethanol yield and reduce production cost. Through analysis the transcriptomic data of Saccharomyces cerevisiae with different ploidy under low pH stress, we hope to find the tolerance mechanism of Saccharomyces cerevisiae to low pH.
2022-12-09 | GSE210964 | GEO
Project description:During meiotic prophase, concurrent transcription, recombination, and chromosome synapsis place substantial topological strain on chromosomal DNA, but the role of topoisomerases in this context remains poorly defined. Here, we analyzed the roles topoisomerases I and II (Top1 and Top2) during meiotic prophase in Saccharomyces cerevisiae. We show that both topoisomerases accumulate primarily in promoter-containing intergenic regions of actively transcribing genes, including many meiotic double-strand break (DSB) hotspots. Despite the comparable binding patterns, top1 and top2 mutations have different effects on meiotic recombination. TOP1 disruption delays DSB induction and shortens the window of DSB accumulation by an unknown mechanism. By contrast, temperature-sensitive top2-1 mutants exhibit a marked delay in meiotic chromosome remodeling and elevated DSB signals on synapsed chromosomes. The problems in chromosome remodeling were linked to altered Top2 binding patterns rather than a loss of Top2 catalytic activity and stemmed from a defect in recruiting the chromosome remodeler Pch2/TRIP13 to synapsed chromosomes. No chromosomal defects were observed in the absence of TOP1. Our results imply independent roles for topoisomerases I and II in modulating meiotic chromosome structure and recombination.
2020-03-06 | GSE131994 | GEO
Project description:Nucleosome depletion in Saccharomyces cerevisiae terminator
| PRJNA130623 | ENA
Project description:Saccharomyces cerevisiae cells: control vs positive supercoiling accumulation after 0, 30 and 120 min
| PRJNA123503 | ENA
Project description:ppGpp accumulation caused by ectopic expression of RelA in Saccharomyces cerevisiae gave rise to marked changes in gene expression with both upregulation and downregulation, including changes in mitochondrial gene expression. The most prominent upregulation (38-fold) was detected in the function-unknown hypothetical gene YBR072C-A, followed by many other known stress-responsive genes. ppGpp acuumulation resulted in enhancement of tolerance against various stress stimuli, such as osmotic stress, ethanol, hydrogen peroxide, and high temperature.
2012-05-31 | GSE38239 | GEO
Project description:Positive DNA helical stress accumulates in vivo by the unbalanced relaxation of positive and negative DNA supercoils in Îtop1, top2ts, pGPD:TopA yeast cells. The resulting overwinding of DNA greatly diminishes overall RNA synthesis. Here we show that whereas most genes reduce their transcript levels by several fold, genes situated at less than 100 kb from the chromosomal ends (near 15% of the genome) are gradually unaffected. This positional effect denotes that chromosomal ends are topologically open, thus precluding the accumulation of DNA helical stress in telomere-proximal regions. The progressive escape from the transcription stall observed in all the chromosome extremities indicates also that friction restrictions to DNA twist diffusion, rather than tight topological boundaries, suffice to confine DNA helical tension along eukaryotic chromatin. Keywords: Time course of positive helical tension accumulation. Two-condition experiment: delta top1-TOPA vs delta top1 top2-ts-TOPA. 3 time points: 0min, 30min, 120min. 3 biological replicates per condition and time point, independently grown in leu- selective media and harvested.
2010-05-19 | E-GEOD-18240 | biostudies-arrayexpress
Project description:Saccharomyces cerevisiae grown in nitrogen depletion with oligodT priming
| PRJNA133083 | ENA
Project description:Saccharomyces cerevisiae grown in nitrogen depletion with MTP priming
| PRJNA133099 | ENA