Similar Datasets
Project description:RNA-seq of Microcystis aeruginosa PCC7806: on hydrogen peroxide
| PRJNA690011 | ENA
Project description:Background: Pseudomonas aeruginosa, a pathogen infecting those with cystic fibrosis, encounters toxicity from phagocyte-derived reactive oxidants including hydrogen peroxide during active infection. P. aeruginosa responds with adaptive and protective strategies against these toxic species to effectively infect humans. Despite advances in our understanding of the responses to oxidative stress in many specific cases, the connectivity between targeted protective genes and the rest of cell metabolism remains obscure. Results: Herein, we performed a genome-wide transcriptome analysis of the cellular responses to hydrogen peroxide in order to determine a more complete picture of how oxidative stress-induced genes are related and regulated. Our data reinforce the previous conclusion that DNA repair proteins and catalases may be among the most vital antioxidant defense systems of P. aeruginosa. Our results also suggest that sublethal oxidative damage reduces active and/or facilitated transport and that intracellular iron might be a key factor for a relationship between oxidative stress and iron regulation. Perhaps most intriguingly, we revealed that the transcription of all F-, R-, and S-type pyocins was upregulated by oxidative stress and at the same time, a cell immunity protein (pyocin S2 immunity protein) was downregulated, possibly leading to self-killing activity. Conclusions: This finding proposes that pyocin production might be another novel defensive scheme against oxidative attack by host cells. Experiment Overall Design: We conducted four and five independent microarray experiments with biological replicates in the absence (control) and the presence (experimental) of hydrogen peroxide, respectively.
2007-07-19 | E-GEOD-3090 | biostudies-arrayexpress
Project description:Microcystis aeruginosa proteome 1D SDS-PAGE nanoLC-MS/MS
2011-03-31 | PRD000277 | Pride
Project description:Background: Pseudomonas aeruginosa, a pathogen infecting those with cystic fibrosis, encounters toxicity from phagocyte-derived reactive oxidants including hydrogen peroxide during active infection. P. aeruginosa responds with adaptive and protective strategies against these toxic species to effectively infect humans. Despite advances in our understanding of the responses to oxidative stress in many specific cases, the connectivity between targeted protective genes and the rest of cell metabolism remains obscure. Results: Herein, we performed a genome-wide transcriptome analysis of the cellular responses to hydrogen peroxide in order to determine a more complete picture of how oxidative stress-induced genes are related and regulated. Our data reinforce the previous conclusion that DNA repair proteins and catalases may be among the most vital antioxidant defense systems of P. aeruginosa. Our results also suggest that sublethal oxidative damage reduces active and/or facilitated transport and that intracellular iron might be a key factor for a relationship between oxidative stress and iron regulation. Perhaps most intriguingly, we revealed that the transcription of all F-, R-, and S-type pyocins was upregulated by oxidative stress and at the same time, a cell immunity protein (pyocin S2 immunity protein) was downregulated, possibly leading to self-killing activity. Conclusions: This finding proposes that pyocin production might be another novel defensive scheme against oxidative attack by host cells. Keywords: Transcriptome study, oxidative stress response
2005-08-15 | GSE3090 | GEO
Project description:Reactive oxygen species such as hydrogen peroxide occur in all aerobically living organisms. Oxidative stress during fermentation can impair the fitness of the production host and the quality of the product. B. pumilus has been described as highly resistant to hydrogen peroxide. The response of exponentially growing B. pumilus cells to hydrogen peroxide was studied.
2014-05-17 | GSE57735 | GEO
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: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:We report 293 Neisseria gonorrhoeae genes that show differential transcript abundance in response to 15 mM hydrogen peroxide treatment by RNA-Seq. We analyze the major physiological functional groups of genes affected by hydrogen peroxide exposure. In addition, we analyze which genes in our hydrogen peroxide-responsive set of genes belong to major known transcriptional regulatory circuits like iron homeostasis, anaerobiosis and others. We annotate which of the 293 hydrogen peroxide-responsive genes belong to operons. We annotate global transcriptional start sites and identify transcriptional start sites that are only present in hydrogen peroxide-treated bacteria. We validate the RNA-Seq data for a subset of representative genes by RT-qPCR and whether transcript abundance in this same subset of genes differs upon treatement with other reactive oxygen species encountered during infection, like organic peroxide, super oxide anion, and bleach.
2018-08-20 | GSE114819 | GEO
Project description:In this experiment we tested the transcriptome of transgenic Arabidopsis seedlings (5-day-old) constitutively expressing the zinc-finger protein Zat12 (At5g59820) under the control of the 35S-CaMV promoter (Zat12). The transcriptome of these seedlings was compared to that of wild type seedlings grown under the same conditions (WT) and to that of wild type seedlings grown under the same conditions and subjected to a hydrogen peroxide stress (WT+H2O2). Hydrogen peroxide treatment was performed by applying 20 mM hydrogen peroxide for 1 hour. In parallel to these experiments transgenic plants expressing Zat12 were subjected to a similar hydrogen peroxide stress (Zat12+H2O2). All treatments were performed with similar size and age seedlings grown in liquid culture (MS) and sampled at the same time as described by Davletova et al., 2005. Experimenter name = Ron Mittler Experimenter phone = 1-775-784-1384 Experimenter fax = 1-775-784-1650 Experimenter department = Dept. of Biochemistry Experimenter institute = University of Nevada Experimenter address = MS200 Experimenter address = Reno Experimenter address = Nevada Experimenter zip/postal_code = 89557 Experimenter country = USA Keywords: genetic_modification_design; stimulus_or_stress_design
2006-08-15 | GSE5530 | GEO
Project description:Transcripitonal profiling of Escherichia coli K-12 W3110 comparing cells with and without hydrogen peroxide treatment, two biological replicates each One-condition experiment, cells with or without hydrogen peroxide treatment for 10min
2014-01-01 | E-GEOD-38185 | biostudies-arrayexpress