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Pseudomonas aeruginosa

ABSTRACT: The sequence of Pseudomonas aeruginosa ST1816 harboring blaVIMs

PROVIDER: PRJDB10522 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR244087_1.fastq.gz	Fastqsanger.gz
	DRR244088_1.fastq.gz	Fastqsanger.gz
	DRR244089_1.fastq.gz	Fastqsanger.gz
	DRR244090_1.fastq.gz	Fastqsanger.gz
	DRR244091_1.fastq.gz	Fastqsanger.gz

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Transcriptome Sequence of Antibiotic-Treated Pseudomonas aeruginosa

Project description:Pseudomonas aeruginosa is known to tolerate antibiotic therapy during infection. This prevents clearance of infection and negatively impacts patient outcomes. Here, we report the transcriptome sequence of antibiotic-treated and untreated P. aeruginosa cultures and the differential gene expression observed when treated cells are compared to untreated cells.

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Project description:The Pseudomonas aeruginosa quorum-sensing (QS) systems contribute to bacterial homeostasis and pathogenicity. Although the AraC family transcription factor VqsM has been characterized to control the production of virulence factors and QS signaling molecules, its detailed regulatory mechanisms still remain elusive. Here, we report that VqsM directly binds to the lasI promoter region, and thus regulates its expression. To identify additional targets of VqsM in P. aeruginosa PAO1, we performed chromatin immunoprecipitation followed by high-throughput DNA sequencing (ChIP-seq) which detected 48 enriched loci harboring VqsM-binding peaks in P. aeruginosa genome. The direct regulation of these genes by VqsM has been confirmed by Electrophoretic mobility shift assays (EMSAs) and quantitative real-time polymerase chain reactions (qRT-PCR). A VqsM-binding motif is found by using MEME suite and verified by footprint assays in vitro. In addition, VqsM directly binds to the promoter regions of antibiotic resistance regulator NfxB and the master type III system regulator ExsA. Notably, the vqsM mutant displayed more resistance to two types of antibiotics and promoted bacterial survival in a mouse model, compared to the wild type PAO1 strain. Collectively, this work provides new cues to better understand the detailed regulatory networks of QS systems, T3SS, and antibiotic resistance. Pseudomonas aeruginosa MAPO1 containing empty pAK1900 or pAK1900-VqsM-VSV

2014-08-04 | E-GEOD-57284 | biostudies-arrayexpress

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Project description:The anaerobic metabolism of the opportunistic pathogen Pseudomonas aeruginosa is important for growth and survival during persistent infections. The two Fnr-type transcription factors Anr and Dnr regulate different parts of the underlying network. Both are proposed to bind to a non-distinguishable DNA sequence named Anr box. The aim of this study was the identification of genes induced under anaerobic conditions in the P. aeruginosa wild type and identification of genes under control of the Anr or Dnr regulators.

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Project description:Pseudomonas aeruginosa PA3973 encodes a putative TetR family transcriptional regulator, with a helix-turn-helix motif involved in DNA binding. We applied phenotype analyses, as well as transcriptome profiling (RNA-seq), and genome-wide identification of binding sites using ChIP-seq to unravel the biological role of PA3973. The ChIP-seq analysis identified more than 300 PA3973 binding sites in the P. aeruginosa genome, among them 139 were located in intergenic regions. The 13 bp sequence was identified as the preferential binding site of PA3973. The PA3973 regulon encompasses genes involved in stress response, including the putative PA3973-PA3970 operon. Transcriptional profiling of P. aeruginosa PAO1161 overexpressing PA3973 showed changes in the mRNA level of 648 genes; among them, 374 were down-regulated. Concomitantly, ChIP-seq analysis identified more than 300 PA3973 binding sites in the P. aeruginosa genome, among them 139 were located in intergenic regions. The 13 bp sequence was identified as the preferential binding site of PA3973.

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