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Transcriptome analysis of E. coli MG1655

ABSTRACT: Expression profiling of wild type and purR deletion strains of E. coli K-12 MG1655 under both M9 minimal media and addition of adenine. An eight chip study with two different strains under two separate culture conditions.

ORGANISM(S): Escherichia coli str. K-12 substr. MG1655

SUBMITTER: Bernhard Palsson

PROVIDER: E-GEOD-26588 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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The PurR regulon in Escherichia coli K-12 MG1655.

Cho Byung-Kwan BK Federowicz Stephen A SA Embree Mallory M Park Young-Seoub YS Kim Donghyuk D Palsson Bernhard Ø BØ

Nucleic acids research 20110513 15

The PurR transcription factor plays a critical role in transcriptional regulation of purine metabolism in enterobacteria. Here, we elucidate the role of PurR under exogenous adenine stimulation at the genome-scale using high-resolution chromatin immunoprecipitation (ChIP)-chip and gene expression data obtained under in vivo conditions. Analysis of microarray data revealed that adenine stimulation led to changes in transcript level of about 10% of Escherichia coli genes, including the purine bios ...[more]

PMID: 21572102

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Genome-scale reconstruction of the PurR regulon reveals its role in the adenine stimulon of Escherichia coli K-12 MG1655

Project description:This SuperSeries is composed of the following subset Series: GSE26588: Transcriptome analysis of E. coli MG1655 GSE26589: ChIP-chip of E. coli K-12 MG1655 with antibody against PurR-8myc under various conditions. Refer to individual Series

2012-01-12 | E-GEOD-26591 | biostudies-arrayexpress

ChIP-chip of E. coli K-12 MG1655 with antibody against PurR-8myc under various conditions.

Project description:We integrated transcription factor binding regions and mRNA transcript abundance to elucidate the PurR regulon experimentally. To measure transcription factor binding at a genome scale, we employed a ChIP-chip method to derivative strains of E. coli K-12 MG1655 harboring PurR-8myc under various conditions. A four ChIP-chip study under two separate culture conditions. The high-density oligonucleotide tiling arrays used were consisted of 371,034 oligonucleotide probes spaced 25 bp apart (25-bp overlap between two probes) across the E. coli genome.

2011-06-14 | E-GEOD-26589 | biostudies-arrayexpress

Fermentative and nitrate respiratory transcriptome analysis of E. coli K12 MG1655

Project description:Determining how facultative anaerobic organisms sense and direct cellular responses to electron acceptor availability has been a subject of intense study. However, even in the model organism Escherichia coli, established mechanisms only explain a small fraction of the hundreds of genes that are regulated during shifts in electron acceptor availability. Here we propose a qualitative model that accounts for the full breadth of regulated genes by detailing how two global transcription factors (TFs), ArcA and Fnr of E. coli, sense key metabolic redox ratios and act on a genome-wide basis to regulate anabolic, catabolic, and energy generation pathways. We first fill gaps in our knowledge of this transcriptional regulatory network by carrying out ChIP-chip and gene expression experiments to identify 463 regulatory events. We then interfaced this reconstructed regulatory network with a highly curated genome-scale metabolic model to show that ArcA and Fnr regulate > 80% of total metabolic flux and 96% of differential gene expression across fermentative and nitrate respiratory conditions. Finally, based on the data we propose a feedforward with feedback trim regulatory scheme by showing extensive repression of catabolic genes by ArcA and extensive activation of chemiosmotic genes by Fnr. We further corroborated this regulatory scheme by showing a 0.71 r2 (p < 1e-6) correlation between changes in metabolic flux and changes in regulatory activity across fermentative and nitrate respiratory conditions. We also are able to relate the proposed model to a wealth of previously generated data by contextualizing the existing transcriptional regulatory network. Biological replicates were performed in triplicate for M-NM-^Tfnr, M-NM-^TarcA, and wild type Escherichia coli K12 MG1655 strains under both fully fermentative and nitrate respiratory conditions. An 18 chip study with three different strains under two different culture conditions.

2014-02-27 | E-GEOD-55365 | biostudies-arrayexpress

Transcriptome analysis of E.coli MG1655 under multiple growth conditions

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ChIP-chip of MG1655 with antibody against E. coli RNAP beta subunit under various conditions

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2009-11-03 | E-GEOD-15588 | biostudies-arrayexpress

In vivo probing of the DNA-binding Architecture by bacterial arginine repressor

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2015-04-01 | E-GEOD-60546 | biostudies-arrayexpress

Expression data from Pseudomonas putida KT2440 (RNA-Seq data)

Project description:We used cDNA generated from total mRNA for RNA-Seq analysis (Genome Analyzer II at GATC Biotech AG) to monitore the gene expression of P. putida after a cold shock from 30M-BM-0C to 10M-BM-0C Culture was grown in minimal medium supplemented with succinate at 30M-BM-0C. In mid-exp. phase cells were harvested for subsequent RNA extraction (standard condition) and medium was cooled down to 10M-BM-0C. Two hrs after reaching the temperature, cells were again harvested for RNA extraction.

2011-02-01 | E-GEOD-24175 | biostudies-arrayexpress

Expression data from Pseudomonas putida KT2440 (Progenika oligo array data)

Project description:We used Progenika oligonucleotide arrays to monitore the gene expression of P. putida after a cold shock from 30°C to 10°C Culture was grown in minimal medium supplemented with succinate at 30°C. In mid-exp. phase cells were harvested for subsequent RNA extraction (standard condition) and medium was cooled down to 10°C. Two hrs after reaching the temperature, cells were again harvested for RNA extraction. Data from four replicate hybridizations (two dye-swaps) were combined into a single ratio value. Individual normalized signal intensity VALUES for each channel of each array are provided in the FullNormalizedMatrix.txt file available on the Series record.

2011-03-24 | E-GEOD-24174 | biostudies-arrayexpress

Determining the control circuitry of redox metabolism at the genome-scale

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2014-02-27 | E-GEOD-55367 | biostudies-arrayexpress

Expression data from Pseudomonas putida KT2440 (Affymetrix data)

Project description:We used Affymetrix microarrays to monitore the gene expression of P. putida after a cold shock from 30°C to 10°C Culture was grown in minimal medium supplemented with succinate at 30°C. In mid-exp. phase cells were harvested for subsequent RNA extraction (standard condition) and medium was cooled down to 10°C. Two hrs after reaching the temperature, cells were again harvested for RNA extraction.

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