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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Streptomyces coelicolor A3(2) strain M600 wild type transcriptome ChIP-chip with the bldC null mutant

ABSTRACT: Global regulation by the Streptomyces coelicolor atypical MerR-like transcription factor BldC. BldC is a transcriptional regulator essential for morphological development and antibiotic production in Streptomyces coelicolor. Here we identify the BldC regulon by means of chromatin immunoprecipitation (ChIP) microarray analysis. The BldC regulon encompasses at least 201 transcriptional units, which include many genes that play key roles in Streptomyces development (e.g., bldC itself, bldB, bldM, whiB, whiD, whiI, sigF, smeA-sffA, hupS), antibiotic production (e.g., afsK) and stress response (e.g., clpB, nsrR, sigE, sigF). All BldC-binding sites identified by ChIP-chip are present in the promoters of the target genes. In vitro DNA-binding experiments show that BldC is capable of binding DNA specifically in the absence of other proteins and suggest that BldC is a minor-groove DNA-binding protein. The regulon of BldC partially overlaps with that of the pleiotropic regulator BldD. BldC and BldD bind to distinct sites in the promoter region of smeA, where they simultaneously repress its transcription. ChIP-chip experiment using an anti-BldC antibody and a total DNA control. Comparison of IP in wild-type strain vs. IP in a bldC null mutant strain.

ORGANISM(S): Streptomyces coelicolor A3(2)

SUBMITTER: Chris den Hengst

PROVIDER: E-GEOD-28908 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Streptomyces coelicolor A3(2) strain M600 wild type transcriptome ChIP-chip with the bldC null mutant

Project description:Global regulation by the Streptomyces coelicolor atypical MerR-like transcription factor BldC. BldC is a transcriptional regulator essential for morphological development and antibiotic production in Streptomyces coelicolor. Here we identify the BldC regulon by means of chromatin immunoprecipitation (ChIP) microarray analysis. The BldC regulon encompasses at least 201 transcriptional units, which include many genes that play key roles in Streptomyces development (e.g., bldC itself, bldB, bldM, whiB, whiD, whiI, sigF, smeA-sffA, hupS), antibiotic production (e.g., afsK) and stress response (e.g., clpB, nsrR, sigE, sigF). All BldC-binding sites identified by ChIP-chip are present in the promoters of the target genes. In vitro DNA-binding experiments show that BldC is capable of binding DNA specifically in the absence of other proteins and suggest that BldC is a minor-groove DNA-binding protein. The regulon of BldC partially overlaps with that of the pleiotropic regulator BldD. BldC and BldD bind to distinct sites in the promoter region of smeA, where they simultaneously repress its transcription.

2013-01-01 | GSE28908 | GEO

Determination by ChIP-chip of the binding sites of the developmental transcription regulator BldC in the genome of Streptomyces venezuelae ATCC 10712

Project description:BldC is a transcriptional regulator essential for morphological development Streptomyces venezuelae. Although bldC deletion strain is unable to produce aerial hyphae, electron microscopy reveals that almost all of the colony biomass is in the form of spores rather than undifferentiated vegetative hyphae. This ChIP-chip experiment was carried out to determine the binding sites, and thence the regulon, of BldC in Streptomyces venezuelae. Cy3(IP):Cy5(Total) signal ratios in the wild type were compared to those in a bldC knockout strain.

2017-11-01 | E-MTAB-6129 | biostudies-arrayexpress

Identification by ChIP-Seq of the binding sites of the developmental protein BldC in the genome of Streptomyces venezuelae

Project description:The BldC gene is required for the formation of aerial hyphae Streptomyces venezuelae. It is 68 amino acid DNA-binding protein related to the MerR family of transcription factors. BldC deletion strains are bald because they initiate sporulation prematurely, omitting the formation of aerial hyphae altogether. This ChIP-Seq experiment was carried out to determine all the binding sites BldC binds to in the genome of Streptomyces venezuelae. Anti-BldC antibodies were used for ChIP-Seq of the wild type (WT) strain after 10 and 14 hours of growth in shaken cultures. A BldC deletion strain was made and anti-BldC antibodies were used for ChIP-Seq in the deletion strain after 14 hours of growth in shaken cultures. This was used as the negative control and enrichment in this ChIP-Seq was subtracted from the enrichment in the WT strain.

2019-01-14 | E-MTAB-7450 | biostudies-arrayexpress

Genome-wide Definition of the SigF Regulon in Mycobacterium tuberculosis

Project description:This SuperSeries is composed of the following subset Series: GSE34919: Genome-wide Definition of the SigF Regulon in Mycobacterium tuberculosis (ChIP-chip) GSE34922: Genome-wide Definition of the SigF Regulon in Mycobacterium tuberculosis (Expression) Refer to individual Series

2012-01-20 | E-GEOD-35080 | biostudies-arrayexpress

2-Methylcitrate cycle: a well-regulated controller in Bacillus sporulation

Project description:To understand which gene(s) are affected by 2-methylcitrate to lead to the delayed sporulation in ∆prpD, we extracted the total RNA from BMB171 and ∆prpD at 12 h for whole genome transcription analysis by RNA sequencing (RNA-Seq). Our RNA-seq data showed that transcriptions of almost all of the SigF regulon genes, as concluded from the B. subtilis regulon, were significantly down-regulated in ∆prpD compared with the wild type BMB171. However, almost all the regulon genes of SigH, a sigma factor that functions upstream of SigF, were significantly up-regulated in ∆prpD. Those genes included spo0A, the early-expressed operon spoIIA and sigF itself. These results indicated that dysregulation of genes occurred on various levels. In particular, though, post-transcriptional inhibition of sigF functionality might subsequently lead to down-regulation of SigF regulon genes in the ∆prpD mutant.

2019-11-14 | GSE140317 | GEO

σF regulon

Project description:The Alphaproteobacterium Caulobacter crescentus inhabits low-nutrient environments and can tolerate certain levels of heavy metal in these sites. It has been reported that C. crescentus responds to chromium exposure by altering expression of a large number of genes. In this work, we showed that the ECF sigma factor SigF is one of the regulatory proteins involved in the control of this transcriptional response. Microarray experiments from cells under dichromate stress showed that SigF controls a small regulon consisting of seven genes. Promoter analyses revealed that a conserved SigF-dependent sequence is located upstream of all but one gene of this regulon. Surprisingly, sigF itself was not found to be strongly auto-regulated under dichromate exposure. Furthermore, we showed that the second gene (CC3252) in the sigF operon acts as a negative regulator of SigF function, as overexpression of this putative membrane protein abolishes the transcriptional activation of sigF and its regulon under dichromate stress. Additionally, we found that substitution of one or both the conserved cysteines in the protein encoded by CC3252 (C131 and C181) affects the ability of this protein in maintaining expression of SigF-dependent genes at basal levels. Interestingly, we showed that the activation of SigF is not caused by reactive oxygen species generated as a consequence of dichromate exposure. Therefore, dichromate most probably may lead to conformational changes in the putative anti-sigma factor CC3252, releasing SigF to bind RNA polymerase core and drive transcription of its regulon.

2012-10-02 | GSE32406 | GEO

Transcription profiling of Streptomyces coelicolor bldC null mutant and parental strain M600

Project description:Transcription profiling of Streptomyces coelicolor bldC null mutant and parental strain M600 in liquid culture exponential phase

2012-03-31 | E-MEXP-3197 | biostudies-arrayexpress

Differential gene expression analysis by RNA-Seq for the bldC deletion strain and the wild type of Streptomyces venezuelae strain NRRL B-65442 after 10 and 14 hours of culture

Project description:The BldC gene is required for the formation of aerial hyphae in Streptomyces venezuelae. It is a 68 amino acid DNA-binding protein related to the MerR family of transcription factors. BldC deletion strains are bald because they initiate sporulation prematurely, omitting the formation of aerial hyphae altogether. This RNA-Seq experiment was carried out to determine and quantify effect of BldC on the expression of all genes in the S. venezuelae genome after 10 and 14 hours of culture.

2019-01-14 | E-MTAB-7457 | biostudies-arrayexpress

σF regulon

2012-10-02 | E-GEOD-32406 | biostudies-arrayexpress

Genome-wide Definition of the SigF Regulon in Mycobacterium tuberculosis (ChIP-chip)

Project description:The genome wide ChIP-on-chip analysis to identify the DNA binding sites for the M.tuberculosis sigma factor Rv3286c (SigF) SigF binding sites were determined by microarray analysis of anti-sigF immunoprecipitated DNA from H37Rv(ΔrsbW/sigF)::pmySigF compared to H37Rv(ΔrsbW/sigF)::pMY769 (both cultured with pristinamycin for 3 days). 4 biological replicates were performed.

2012-01-20 | E-GEOD-34919 | biostudies-arrayexpress

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