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Expression Data from Brucella abortus strain 2308 and isogenic mucR mutant cells

ABSTRACT: MucR is one of the few transcriptional regulatory proteins that has been linked to Brucella pathogenesis. We used custom-made Affymetrix B. abortus strain 2308 derived GeneChips to copare the gene expression properties of wild type and isogenic mucR mutant cells.

ORGANISM(S): Brucella abortus

PROVIDER: GSE40532 | GEO | 2012/12/01

SECONDARY ACCESSION(S): PRJNA174246

REPOSITORIES: GEO

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Expression Data from Brucella abortus strain 2308 and isogenic mucR mutant cells

Project description:MucR is one of the few transcriptional regulatory proteins that has been linked to Brucella pathogenesis. We used custom-made Affymetrix B. abortus strain 2308 derived GeneChips to copare the gene expression properties of wild type and isogenic mucR mutant cells. B. abortus strain 2308 or mucR mutant cells were grown to stationary phase growth, total bacterial RNA was isolated and subjected to GeneChip hybridization and analysis. We sought to determine the regulatory effects of MucR.

2012-12-01 | E-GEOD-40532 | biostudies-arrayexpress

Expression Data from Brucella abortus strain 2308 and isogenic mavR mutant cells

Project description:MavR is a 160 nucleotide regulatory RNA molecule that is produced during B. abortus strain 2308 growth in nutrient-replete broth. We used custom-made Affymetrix B. abortus strain 2308 derived GeneChips to compare the gene expression properties of wild type and isogenic mavR mutant cells.

2023-11-20 | GSE247672 | GEO

Expression Data from Brucella abortus strain 2308 and isogenic vtlR mutant cells

2015-08-03 | GSE69564 | GEO

Expression Data from Brucella abortus strain 2308 and isogenic abcR1 abcR2 mutant cells

2012-06-15 | GSE38017 | GEO

Expression Data from Brucella abortus strain 2308 and isogenic vtlR mutant cells

Project description:VtlR (virulence-associated transcriptional LysR-family regulator) is thought to be a transcriptional regulator of B. abortus virulence determinants We used custom-made Affymetrix B. abortus strain 2308 derived GeneChips to compare the gene expression properties of wild type and isogenic vtlR mutant cells. B. abortus strain 2308 or vltR mutant cells were grown to late exponential phase growth, total bacterial RNA was isolated and subjected to GeneChip hybridization and analysis. We sought to determine the regulatory effects of VtlR.

2015-08-03 | E-GEOD-69564 | biostudies-arrayexpress

Expression Data from Brucella abortus strain 2308 and isogenic abcR1 abcR2 mutant cells

Project description:abcR1 and abcR2 produce two regulatory RNA molecules, that are produced during stationary phase growth. We used custom-made Affymetrix B. abortus strain 2308 derived GeneChips to compare the gene expression properties of wild type and isogenic abcR1 abcR2 double mutant cells. B. abortus strain 2308 or abcR1 abcR2 double mutant cells were grown to stationary phase growth, total bacterial RNA was isolated and subjected to GeneChip hybridization and analysis. We sought to determine the regulatory effects of abcR1 and abcR2 RNA species.

2012-06-14 | E-GEOD-38017 | biostudies-arrayexpress

Transcription profiling of B. abortus BvrS BvrR from B. abortus 2308

Project description:The analysis of the expression profile of the two component system BvrR/BvrS of the B. abortus 2308 making the comparison of the expression of the B. abortus 2308 and B. abortus 2308 BvrR- (mutant in the gen BvrR) whit the microarray of brucella melitensis (Brucearray)

2010-04-22 | E-MEXP-2564 | biostudies-arrayexpress

Brucella abortus 2308

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Brucella MucR acts as an H-NS-like protein to silence virulence genes and structure the nucleoid 

Project description:Histone-like nucleoid structuring (H-NS) and H-NS-like proteins serve as global gene silencers and work with antagonistic transcriptional activators (counter- silencers) to properly coordinate the expression of virulence genes in pathogenic bacteria. In Brucella, MucR has been proposed as a novel H-NS-like gene silencer, but direct experimental evidence is lacking. Here, we show that MucR serves as an H-NS-like silencer of the Brucella abortus genes encoding the polar autotransporter adhesins BtaE and BmaC, the c-di-GMP-specific phosphodiesterase BpdB, and the quorum-sensing regulator BabR. We also demonstrate that the MarR-type transcriptional activator MdrA can displace MucR from the btaE promoter, supporting the existence of MucR counter- silencers in Brucella. Moreover, our chromatin immunoprecipitation (ChIP)-seq analysis identified 546 MucR enrichment peaks along the genome, including in the promoters of the genes encoding the Type IV secretion machinery and effectors and the quorum- sensing regulator VjbR. Importantly, MucR ChIP-seq peaks overlap with the previously described binding sites for the transcriptional activators VjbR, BvrR, and CtrA suggesting that these regulators serve as MucR counter-silencers and work in concert with MucR to coordinate virulence gene expression in Brucella. In addition, using chromosome conformation capture (Hi-C), we show that like H-NS in Escherichia coli, MucR alters the global structure of the Brucella nucleoid. Finally, a copy of the E. coli hns rescues the distinctive growth defect and elevated btaE expression of a B. abortus mucR mutant. Together, these findings solidify the role of MucR as a novel type of H-NS-like protein and suggest that MucR’s gene-silencing properties play a key role in virulence in Brucella.

2023-09-16 | GSE234935 | GEO

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