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Pseudomonas aeruginosa PA14

ABSTRACT: Experimental evolution of uninfected PA14 and PA14 infected with temperate virus DMS3

PROVIDER: PRJNA1021667 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29669118_1.fastq.gz	Fastqsanger.gz
	SRR29669118_2.fastq.gz	Fastqsanger.gz
	SRR29669119_1.fastq.gz	Fastqsanger.gz
	SRR29669119_2.fastq.gz	Fastqsanger.gz
	SRR29669120_1.fastq.gz	Fastqsanger.gz

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Pseudomonas aeruginosa PA14

Project description:Experimental evolution of antibiotic resistance with Pseudomonas aeruginosa PA14

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Project description:Recent studies have shown that the concentrations of proteins expressed from orthologous genes are often conserved across organisms, and to a greater extent than the abundances of the corresponding mRNAs. However, such studies have not distinguished between evolutionary (e.g., sequence divergence) and environmental (e.g., growth condition) effects on the regulation of steady-state protein and mRNA abundances. Here we systematically investigated the transcriptome and proteome of two closely related Pseudomonas aeruginosa strains, PAO1 and PA14, under identical experimental conditions, thus controlling for environmental effects. For 703 genes observed by both shotgun proteomics and microarray experiments, we find that the protein-to-mRNA ratios are highly correlated between orthologous genes in the two strains, to an extent comparable to protein and mRNA abundances. In spite of this high molecular similarity between PAO1 and PA14, we found that several metabolic, virulence, and antibiotic resistance genes are differentially expressed between the two strains, mostly at the protein but not at the mRNA level. Our data demonstrate that post-transcriptional regulation is important for understanding the discordance between mRNA and protein abundance.

2014-05-08 | PXD000684 | Pride

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Project description:P. aeruginosa PA14 mutant strain PA4496 expression in biofilm cells relative to PA14 wild-type strain expression in biofilm cells. All samples cultured in LB with glass wool

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P. aeruginosa PA14-WT vs pyrF mutant vs pyrF mutant w/uracil

Project description:Comparative transcriptome analyses of P. aeruginosa PA14 pyrF mutant with PA14 wild type, and with PA14 pyrF mutant with 1 mM uracil supplement and PA14 wild type with 10 mM uracil in biofilm cells. All samples were cultured in LB with glass wool at 37C for 7h. Keywords: Pseudomonas aeruginosa biofilm pyrF uracil

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Expression data from Arabidopsis seedlings treated with Pseudomonas aeruginosa (strain PA14)

Project description:Early stages of host microbe adaptations involve 'system status changes' (rewiring of pre-existing cellular signaling networks and components) of the host and microbe. We posited that under certain environmental conditions these changes leads to maladaptations and favor emergence of new infectious diseases, and these adaptations will have characteristic signatures representative of the adaptation. Here using Arabidopsis seedlings in a submerged environment treated with P. aerugionsa, we show one such rewired regulation where the master two-component regulator GacA (previously shown to act upstream of quorum sensing, including the regulator LasR, that in turn controls a subset of virulence factors) is completely dispensable. The gacA mutant behaves similar to wild type P. aeruginosa (strain PA14) by a number of read-outs. Consistent with that, the gene expression data here indicates that the transcriptome pattern of the host is identical when treated with wild type PA14 or PA14-gacA mutant. Single time point (10 day old Arabidopsis seedlings infected with wild type PA14 or mutant bacteria PA14DgacA, and analyzed 24h after infection) with two independent experimenal replicates per treatment

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The P. aeruginosa PA14 transcriptome recorded under 14 different experimental conditions

Project description:We analyzed the transcriptional profile of P.aeruginosa PA14 grown under 14 different environmental conditions. These included conditions of growth within biofilms, at various temperatures, osmolarities and phosphate concentrations, under anaerobic conditions, attached to a surface and conditions encountered within the eukaryotic host. We found that >30% of the PA14 genome was differentially regulated at least under one of the 14 environmental conditions (referred to as the adaptive transcriptome). Most of the genes were also differentially regulated upon sigma factor hyper expression and/or inactivation (GEO accession number GSE54999) and many of those belonged to primary alternative sigma factor regulons. The samples of P. aeruginosa PA14 wild type strain were cultivated under 14 different experimental conditions and were analyzed by RNA-seq. For each condition, at least two biological replicates were generated Please note that PA14 is our standard lab strain used for all generated data in this records. There is no mutation introduced for any of those experiments, and thus, the descriptions only highlight the growth conditions.

2015-06-16 | E-GEOD-55197 | biostudies-arrayexpress

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