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ChIP-seq of the multiple antibiotic resistance activator (MarA) protein and RNA polymerase sigma70 subunit of Enterotoxigenic Escherichia coli strain H10407

ABSTRACT: ChIP-seq of the multiple antibiotic resistance activator (MarA) protein and RNA polymerase sigma70 subunit of Enterotoxigenic Escherichia coli strain H10407

PROVIDER: PRJEB19685 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR1857330_1.fastq.gz	Fastqsanger.gz
	ERR1857330_2.fastq.gz	Fastqsanger.gz
	ERR1857331_1.fastq.gz	Fastqsanger.gz
	ERR1857331_2.fastq.gz	Fastqsanger.gz
	ERR1857332_1.fastq.gz	Fastqsanger.gz

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ChIP-seq of the multiple antibiotic resistance activator (MarA) protein and RNA polymerase sigma70 subunit of Enterotoxigenic Escherichia coli strain H10407

Project description:The experiment contains ChIP-seq data for Enterotoxigenic Escherichia coli strain H10407 transformed with plasmid pRGM9818. The strain was grown at 37 degrees in LB medium and crosslinked with 1 % (v/v) formaldehyde. After sonication, to break open cells and fragment DNA, immunoprecipitations were done using antibodies against MarA, MarR or the RNA polymerase sigma 70 subunit. Libraries were prepared using DNA remaining after immunoprecipitation. Note that the MarR immunoprecipitations were not successful but the data served as a useful control for non-specifically immunoprecipitated DNA sequences.

2017-09-30 | E-MTAB-5521 | biostudies-arrayexpress

ChIP-seq of the multiple antibiotic resistance repressor (MarR) protein of Enterotoxigenic Escherichia coli strain H10407

Project description:The experiment contains ChIP-seq data for Enterotoxigenic Escherichia coli strain H10407 transformed with plasmids pAMNF (encoding an N-terminal MarR-3xFLAG fusion) or pAMNM (encoding an N-terminal MarR-8xmyc fusion). The cells was cultured at 37 degrees in LB medium and crosslinked with 1 % (v/v) formaldehyde. After sonication, to break open cells and fragment DNA, immunoprecipitations were done using an anti-FLAG antibody (i.e. the strain encoding the MarR-8xmyc fusion was used as a control). Libraries were prepared using DNA remaining after immunoprecipitation.

2017-12-01 | E-MTAB-5591 | biostudies-arrayexpress

ETEC H10407 ChIP-Seq

Project description:To generate and compile data from ChIP-Seq libraries. Looking at CRP, H-NS, and sigma70 binding genome wide under M9 minimal growth conditions in duplicate.

2014-10-16 | E-MTAB-2917 | biostudies-arrayexpress

ETEC H10407 ChIP-Seq

Project description:ETEC H10407 ChIP-Seq

| PRJEB7505 | ENA

ChIP-seq of the multiple antibiotic resistance repressor (MarR) protein of Enterotoxigenic Escherichia coli strain H10407

Project description:ChIP-seq of the multiple antibiotic resistance repressor (MarR) protein of Enterotoxigenic Escherichia coli strain H10407

| PRJEB20037 | ENA

Escherichia coli ETEC H10407

Project description:Escherichia coli ETEC H10407 genome sequencing project

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ChIP-chip of Sigma70 and RNAP Beta in vivo in E. coli MG1655

Project description:These data were used to infer the genome-wide localization of sigma70 and core RNAP beta subunit for the study "The transition between transcriptional initiation and elongation in E. coli is highly variable and often rate-limiting" (Reppas et al. 2006). This study analyzes transfrags with respect to the ChIP profile of the sigma70 and the beta subunit of RNA polymerase. Keywords: ChIP-chip; tiled analysis of mRNA expression

2006-10-19 | GSE6061 | GEO

Global transcriptome of CFA/I expressing ETEC H10407 under in vitro growth and water stress

Project description:Enterotoxigeneic Escherichia coli (ETEC) is a leading cause of diarrhoeal infections in young children living in endemic regions in low and middle-income countries and adults travelling to these destinations. CFA/I fimbriae have been identified as the predominant colonisation factor associated with human ETEC infections. Here we used used Transposon-directed insertion-site sequencing (TraDIS) and transcriptomic analysis to identify the essential genome of the prototypical CFA/I expressing ETEC strain H10407 and uncover the survival mechanisms that enhance persistence of ETEC isolates in water and within mammalian hosts. RNA transcription profiles of H10407 were identified under different in vitro growth conditions including aerobic growth in neutral LB media (pH7); aerobic growth in acidic media (pH5); aerobic growth in alkaline media (pH9); anaerobic growth in neutral LB media (pH7); and survival in fresh water. Research work including RNA preparation and bioinformatics and statistical analyses were conducted at the Wellcome Trust Sanger Institute (WTSI) and the Westmead Institute for Medical Research (WIMR), the University of Sydney. The sequencing data was generated in the Bioscience Core Laboratory at King Abdullah University of Science and Technology (KAUST).

2021-04-21 | E-MTAB-9364 | biostudies-arrayexpress

A commensal gone bad: complete genome sequence of the prototypical enterotoxigenic Escherichia coli strain H10407.

Project description:In most cases, Escherichia coli exists as a harmless commensal organism, but it may on occasion cause intestinal and/or extraintestinal disease. Enterotoxigenic E. coli (ETEC) is the predominant cause of E. coli-mediated diarrhea in the developing world and is responsible for a significant portion of pediatric deaths. In this study, we determined the complete genomic sequence of E. coli H10407, a prototypical strain of enterotoxigenic E. coli, which reproducibly elicits diarrhea in human volunteer studies. We performed genomic and phylogenetic comparisons with other E. coli strains, revealing that the chromosome is closely related to that of the nonpathogenic commensal strain E. coli HS and to those of the laboratory strains E. coli K-12 and C. Furthermore, these analyses demonstrated that there were no chromosomally encoded factors unique to any sequenced ETEC strains. Comparison of the E. coli H10407 plasmids with those from several ETEC strains revealed that the plasmids had a mosaic structure but that several loci were conserved among ETEC strains. This study provides a genetic context for the vast amount of experimental and epidemiological data that have been published.

| S-EPMC2953697 | biostudies-literature

Role of mucus-bacteria interactions in Enterotoxigenic Escherichia coli (ETEC) H10407 virulence and interplay with human microbiome.

Project description:The intestinal mucus layer has a dual role in human health constituting a well-known microbial niche that supports gut microbiota maintenance but also acting as a physical barrier against enteric pathogens. Enterotoxigenic Escherichia coli (ETEC), the major agent responsible for traveler's diarrhea, is able to bind and degrade intestinal mucins, representing an important but understudied virulent trait of the pathogen. Using a set of complementary in vitro approaches simulating the human digestive environment, this study aimed to describe how the mucus microenvironment could shape different aspects of the human ETEC strain H10407 pathophysiology, namely its survival, adhesion, virulence gene expression, interleukin-8 induction and interactions with human fecal microbiota. Using the TNO gastrointestinal model (TIM-1) simulating the physicochemical conditions of the human upper gastrointestinal (GI) tract, we reported that mucus secretion and physical surface sustained ETEC survival, probably by helping it to face GI stresses. When integrating the host part in Caco2/HT29-MTX co-culture model, we demonstrated that mucus secreting-cells favored ETEC adhesion and virulence gene expression, but did not impede ETEC Interleukin-8 (IL-8) induction. Furthermore, we proved that mucosal surface did not favor ETEC colonization in a complex gut microbial background simulated in batch fecal experiments. However, the mucus-specific microbiota was widely modified upon the ETEC challenge suggesting its role in the pathogen infectious cycle. Using multi-targeted in vitro approaches, this study supports the major role played by mucus in ETEC pathophysiology, opening avenues in the design of new treatment strategies.

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