Saccharomyces cerevisiae
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA126813 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Adaptation to hydrogen peroxide in Saccharomyces cerevisiae is profiled with expression arrays. Adaptation describes the process in which a mild dose of toxin (in this case, hydrogen peroxide) is able to protect against a later acute dose. Here, we study two adaptive protocols (0.1 mM H2O2 and 0.1 + 0.4 mM H2O2) and one acute protocol (0.4 mM H2O2) to identify processes uniquely involved in adaptation. Predictions from these studies are validated in expression profiling of deletion mutants of the transcription factors Yap1, Mga2, and Rox1.
2009-04-23 | GSE12602 | GEO
Project description:Cbf1 is a basic helix-loop-helix transcription factor which regulates the expression of many genes of the sulphur assimilation pathway in yeast. Gamma-glutamylcysteine synthetase (GSH1), encoding the rate-limiting enzyme in glutathione biosynthesis, is constitutively elevated in cbf1 mutants indicating that Cbf1 normally represses GSH1 expression. We used transcriptional profiling to show that a number of antioxidant and stress genes are similarly repressed by Cbf1, consistent with the high oxidant tolerance of cbf1 mutants. Our data indicate that Cbf1 plays a key role in the regulation of gene expression during oxidative stress conditions induced by exposure to hydrogen peroxide. The Yap1 transcription factor induces GSH1 expression in response to hydrogen peroxide in a mechanism that does not require the Met4 transcription factor to overcome the inhibitory action of Cbf1. We show that hydrogen peroxide does not affect Cbf1 occupancy on the GSH1 promoter, but results in specific modification of Cbf1 by phosphorylation. Our data indicate that casein kinase (CK2) can directly phosphorylate Cbf1 in vitro. Furthermore, CK2 activity is required to phosphorylate Cbf1 and induce GSH1 expression in yeast cells in response to hydrogen peroxide. CK2 mutants are sensitive to hydrogen peroxide consistent with a role for CK2 in regulating the cellular response to oxidative stress. CK2 is a ubiquitous serine/threonine protein kinase and the finding that it is regulated by oxidative stress is particularly interesting, since there is increasing evidence that it is involved in a number of pathological conditions including cancer, neurodegenerative and cardiovascular diseases.
2009-10-01 | E-MEXP-2159 | biostudies-arrayexpress
Project description:To gain insight into the basic mechanism of Hydrogen peroxide detoxification in the methylotrophic yeast, H. polymorpha, we analyzed changes in transcriptional profiles in response to hydrogen peroxide exposure.
2015-02-28 | GSE43048 | GEO
Project description:Expression data from yeast wild type (WT) and sod1Δ strains after treatment with hydrogen peroxide (H2O2)
| PRJNA238479 | ENA
Project description:Yeast cells response during recovery after hydrogen peroxide stress. Comparison of yeast cells treated with 1.5mM hydrogen peroxide for 30 min with cells allowed to recover for 60 min
2006-01-28 | E-MEXP-326 | biostudies-arrayexpress
Project description:Acinetobacter baumannii is a Gram-negative opportunistic pathogen that causes multiple infections, including pneumonia, bacteremia, and wound infections. Due to multiple intrinsic and acquired drug-resistance mechanisms, A. baumannii isolates are commonly multi-drug resistant and infections are notoriously difficult to treat. Therefore, it is important to identify mechanisms used by A. baumannii to survive stresses encountered during infection as a means of identifying new drug targets. In this study, we determined the transcriptional response of A. baumannii to hydrogen peroxide stress using RNASequencing. Upon exposure to hydrogen peroxide, A. baumannii differentially transcribes several hundred genes. In this study, we also determined the transcriptional profile of A. baumannii strains with the transcriptional regulators mumR or oxyR genetically inactivated and identified transcriptional differences between these strains and wild-type A. baumannii in response to hydrogen peroxide stress. In doing this, the function of A. baumannii OxyR in hydrogen peroxide stress resistance and regulation of genes required for hydrogen peroxide detoxification was defined. Moreover, the contribution of the uncharacterized regulator MumR to hydrogen peroxide stress resistance was also explored. This work reveals the transcriptome of an important human pathogen in the presence of hydrogen peroxide stress.
2018-11-13 | GSE114130 | GEO
Project description:Butanol is a bulk chemical feedstock and a promising fuels. Microbial production of butanol is challenging primarily because of its toxicity and low titer of production. Transcript regulator factor Rob plays an important role in butanol-tolerant functional revealed by our previous study. In this study, the mutant strain DTrob (AT686-687 deletion in rob gene) could tolerate 1.25 %(v/v) butanol. And the per unit intracellular butanol concentration and transcriptome of wild-type and DTrob were further compared to understand the regulation mechanism of Rob for butanol tolerance. A total of 285 DEGs (differentially expression genes) were identified by bioinformatic analysis, and they may function in transport and localization according to the GO functional annotations and the functional annotation of gene product in NCBI database. Eighteen DEGs representing different functional categories were selected for real-time quantitative PCR (qPCR) for confirming the dependability of RNA-seq data. The deletion strains of glgS or yibT gene, which were down-regulated by Rob, had butanol-toleranct characteristic, indicating that the deletion or downregulated expression of the two genes down-regulated by Rob could improve the butanol tolerance. This study reveals the transcript regulator factor Rob could regulate and control the expression of the butanol tolerant genes, and its inactivation would result in an improved butanol tolerance.
2019-09-17 | GSE120032 | GEO
Project description:We sequenced the transcriptomes of B. abortus 2308 wild type, rpoE1, and lovhK deletion strains to assess gene expression in response to oxidative stress. The data represent 2 independent biological replicates of each strain. Illumina RNA-seq of total mRNA isolated from wild type, rpoE1, and lovhK deletion strains that were each exposed to 5 mM hydrogen peroxide for 10 min.
2014-09-25 | E-GEOD-59513 | biostudies-arrayexpress
Project description:The goal of this study is to characterize a gshF::cam L. plantarum strain NZ7608. From phenotype characterization we have observed that the gene gshF plays a role in hydrogen peroxide resistance in L. plantarum and therefore we wanted to analyze the global transcriptome response of strain NZ7608 towards peroxide and compared this to wild type response. In this experiment we compared two L. plantarum strains: WCFS1 (wild type) and NZ7618 (gshF::cam). Both strains were grown -in duplo- on CDM containing 0.5% glucose at 37 degrees celsius. When cell density reached OD600=1.0 a hydrogen peroxide stress was given to the cultures to a final concentration of 10mM. Samples were taken at times (0 10 and 30 minutes) upon hydrogen peroxide. All withdrawn samples were used for this microarray experiment. Keywords: peroxide, gshF mutant
2008-01-09 | GSE9961 | GEO