RNA-seq data showing the effects of rpoD mutation t1682c in Pseudomonas fluorescens
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ABSTRACT:
PROVIDER: PRJNA478834 | ENA |
REPOSITORIES: ENA
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Project description:We report RNA-seq data for four Pseudomonas fluorescens SBW25 types: SBW25 (wild type) and dervied types 6A4, 6B4-Cap- and 6B4-Cap+. The aim of the study is to see the effect of a mutation in rpoD (carried by 6B4) on the transcriptome.
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Project description:ChIP-on-chip analysis of RNAP and RpoD binding to the Salmonella enterica serovar Typhimurium chromosome demonstrated a high degree of overlap between RNAP and RpoD binding and provided us with important insights into the global distribution of these factors. Furthermore this data was correlated with information on the location of 1873 transcription start sites identified by RNA-Seq technology, thereby providing a detailed transcriptional map of Salmonella Typhimurium. Analysis of RNAP, RNAP-Rifampicin and and RpoD binding in Luria Broth (LB)
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Project description:We used RNA-seq to profile transcriptomic changes underlying the phenotypic variations observed between E. coli strains expressing different RpoD ortholog variants.
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Project description:The goal of the study was to examine the influence of flowback water exposure on bacterial survival and biocide tolerance. The transcriptome of P. fluorescens was analyzed using RNA-seq to determine the gene rxpression profile changes occuring upon flowback water exposure. The results indicate that that P. fluorescens induces a well-coordinated genetic response that aids in its survival in flowback water as well as imparts enhanced tolerance against typically used slow acting biocides such as gluteraldehyde but increased susceptibity towards sodium hypochlorite. RNA-seq data demonstrated significant induction of genes involved in osmotic stress, energy production and conversion, membrane integrity, protein transport among others.
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Project description:The goal of the study was to examine the influence of flowback water exposure on bacterial survival and biocide tolerance. The transcriptome of P. fluorescens was analyzed using RNA-seq to determine the gene rxpression profile changes occuring upon flowback water exposure. The results indicate that that P. fluorescens induces a well-coordinated genetic response that aids in its survival in flowback water as well as imparts enhanced tolerance against typically used slow acting biocides such as gluteraldehyde but increased susceptibity towards sodium hypochlorite. RNA-seq data demonstrated significant induction of genes involved in osmotic stress, energy production and conversion, membrane integrity, protein transport among others. Examination of P. fluorescens transcriptome exposed to flowback water for one hour and compare with PBS exposed cells.
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Project description:Pseudomonas species are ubiquitous in plant-associated environments and produce an array of volatiles, enzymes and antimicrobials. The biosynthesis of many metabolites is regulated by the GacS/GacA two-component regulatory system. Transcriptome analysis of Pseudomonas fluorescens SBW25 revealed that 702 genes were differentially regulated (fold change>4, P<0.0001) in a gacS::Tn5 mutant, with 300 and 402 genes up- and down-regulated, respectively. Genes that were significantly down-regulated are involved in viscosin biosynthesis (viscABC), protease production (aprA), motility, biofilm formation, and secretory systems. Genes that were significantly up-regulated are involved in siderophore biosynthesis and oxidative stress. In contrast to previous studies with gac-mutants of other Pseudomonas species/strains, the gacS mutant of SBW25 inhibited growth of oomycete, fungal and bacterial pathogens significantly more than parental strain SBW25. A potential candidate for this enhanced antimicrobial activity was a large nonribosomal peptide synthetase (NRPS) gene cluster predicted to encode for an 8-amino-acid ornicorrugatin-like peptide. Site-directed mutagenesis of an NRPS gene in this cluster, however, did not lead to a reduction in the antimicrobial activity of the gacS mutant. Collectively these results indicate that a mutation in the GacS/GacA regulatory system causes major transcriptional changes in P. fluorescens SBW25 and significantly enhances its antimicrobial activities by yet unknown mechanisms. This expression study used total RNA recovered from four separate wild-type cultures of Pseudomonas fluorescens SBW25 and four separate cultures of the gacS mutant. Expression design was based on the updated genome sequence of Pseudomonas fluorescens SBW25, NC_012660.1 and associated plasmid pQBR0476 with nineteen 60-mer probe per gene. Each probe is replicated 3 times. The design includes random GC and other control probes.
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Project description:The goal of this study was to evaluate the molecular mechanisms by which Brachypodium distachyon grown with and without Pseudomonas fluorescens (P. fluorescens) strain SBW25 respond to Fe deprivation. Fe deprivation induced Brachypodium secretion of phytosiderophores and reduced biomass production while inoculation with P. fluorescens resulted in alterations of extracellular metabolite abundances. Results provide insight into the role of iron in interactions between a host plant and root associated bacteria.
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