Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of Vibrio cholerae isolated from patients in stationary phase

ABSTRACT: All arrays used in Hyperinfectivity study Merrell DS, Butler SM, Qadri F, Dolganov NA, Alam A, Cohen MB, Calderwood SB, Schoolnik GK, Camilli A. Related Articles Host-induced epidemic spread of the cholera bacterium. Nature. 2002 Jun 6;417(6889):642-5. PMID: 12050664 A=patient A, B=patient B, C=patient C, stationary phase=stationary phase vibrio for comparison, and numbers represent technical replicates of the denoted sample.

ORGANISM(S): Vibrio cholerae

SUBMITTER: Douglas Scott Merrell

PROVIDER: E-SMDB-1384 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Host-induced epidemic spread of the cholera bacterium.

Merrell D Scott DS Butler Susan M SM Qadri Firdausi F Dolganov Nadia A NA Alam Ahsfaqul A Cohen Mitchell B MB Calderwood Stephen B SB Schoolnik Gary K GK Camilli Andrew A

Nature 20020601 6889

The factors that enhance the transmission of pathogens during epidemic spread are ill defined. Water-borne spread of the diarrhoeal disease cholera occurs rapidly in nature, whereas infection of human volunteers with bacteria grown in vitro is difficult in the absence of stomach acid buffering. It is unclear, however, whether stomach acidity is a principal factor contributing to epidemic spread. Here we report that characterization of Vibrio cholerae from human stools supports a model whereby hu ...[more]

PMID: 12050664

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Project description:Cholera is a diarrheal disease caused by Vibrio cholerae of serogroups O1 and O139 that affects impoverished populations worldwide. The histone-like nucleoid structuring protein (H-NS) is a global regulator of environmentally-regulated gene expression that plays a fundamental role in V. cholerae adaptation to disparate ecological niches. We used RNA-seq to characterize the hns transcriptome of El Tor biotype V. cholerae. H-NS affected the expression of 18% of all predicted genes in a growth phase-dependent manner. It silenced the transcription of genes encoding virulence regulators and cytotoxic factors such as the VieSAB regulatory system, the repeat in toxin (RTX) and hemolysin. H-NS was 10 times more effective in silencing the vieSAB promoter in El Tor compared to classical biotype V. cholerae. In the El Tor biotype hns mutant, VieSAB significantly enhanced the expression of cholera toxin genes. For the RTX and hemolysin, we found that overexpression of the transcription activator HlyU diminished H-NS occupancy at the hlyA promoter but not at the rtxCA and rtxBDE promoters. H-NS had a significant impact on the cell envelope and the mutant expressed elevated rpoE encoding the extracytoplamic sigma factor E (sE), though this effect was indirect. A remarkable feature of the hns transcriptome was the down-regulation of numerous methyl-accepting chemotaxis proteins in early stationary phase that translated into diminished chemotaxis toward the amino acids glycine and serine. Our study suggests that H-NS transcriptional silencing can contribute to multiple phenotypic differences observed between V. cholerae biotypes, mainly by differentially repressing the VieSAB sensory pathway. Transcriptome profiles of wild type and M-NM-^Thns mutant cells of the V. cholerae strain C7258 grown in LB medium were generated by Next Generation Sequencing using the Illumina HiSeq2000 platform. Samples from mid-exponential phase (OD600 0.5) and early stationary phase (OD600 2.0) were analyzed in duplicate

Dataset Information

Transcription profiling of Vibrio cholerae isolated from patients in stationary phase

Publications

Host-induced epidemic spread of the cholera bacterium.

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