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Global gene expression of Ruegeria pomeroyi DSS-3 during ammonium-limited, ribose phosphate-, methylphosphonate-, or potassium phosphate-excess growth regimes or during potassium phosphate-limited, ammonium-excess regime

ABSTRACT: We used the previously designed oligonucleotide microarrays (Bürgmann et al., 2007, Environmental Microbiology, 9: 2742-2755) to detect the mRNA transcripts of R. pomeroyi DSS-3 when the cells were cultured under steady-state conditions limited with ammonium (NH4Cl, 0.26 mM) but with an excess of D-ribose-5-phosphate (C5H9Na2O8P*2H2O, 0.5 mM), methylphosphonic acid (CH5PO3, 0.5 mM), or potassium phosphate (KH2PO4, 0.5 mM), or during ammonium excess (NH4Cl, 2.8 mM) but were limited with potassium phosphate (KH2PO4, 9.2 μM).

ORGANISM(S): Ruegeria pomeroyi DSS-3

PROVIDER: GSE38740 | GEO | 2014/06/02

SECONDARY ACCESSION(S): PRJNA168554

REPOSITORIES: GEO

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Global gene expression of Ruegeria pomeroyi DSS-3 during ammonium-limited, ribose phosphate-, methylphosphonate-, or potassium phosphate-excess growth regimes or during potassium phosphate-limited, ammonium-excess regime

Project description:We used the previously designed oligonucleotide microarrays (BM-CM-<rgmann et al., 2007, Environmental Microbiology, 9: 2742-2755) to detect the mRNA transcripts of R. pomeroyi DSS-3 when the cells were cultured under steady-state conditions limited with ammonium (NH4Cl, 0.26 mM) but with an excess of D-ribose-5-phosphate (C5H9Na2O8P*2H2O, 0.5 mM), methylphosphonic acid (CH5PO3, 0.5 mM), or potassium phosphate (KH2PO4, 0.5 mM), or during ammonium excess (NH4Cl, 2.8 mM) but were limited with potassium phosphate (KH2PO4, 9.2 M-NM-<M). A total of 13 microarray hybridizations were performed: three biological replicates each from ribose phosphate, methylphosphonate, or potassium phosphate excess growth regimes, three biological replicates from potassium phosphate limited growth regime, and one technical replicate for the potassium phosphate excess growth regime. Data for the technical replicates were averaged and combined, resulted in a total of 12 samples.

2014-06-02 | E-GEOD-38740 | biostudies-arrayexpress

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Project description:We used the previously designed oligonucleotide-based microarray (Burgmann et al. Environmental Microbiology 2007, 9: 2742-2755) to detect the transcripts of R. pomeroyi DSS-3 genes when the cells were cultured under steady-state carbon (glucose), nitrogen (ammonium), phosphorus (phosphate), or sulfur (sulfate) limitation. A total of 14 mRNA samples were hybridized to the arrays (three biological replicates from glucose, ammonium, phosphate, or sulfate limitation and one technical replicate each for ammonium or sulfate limitation)

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Project description:Phosphate-solubilizing bacteria (PSB) have the ability to dissolve insoluble phosphate and enhance soil fertility. However, the growth and mineral phosphate solubilization of PSB could be affected by exogenous soluble phosphate and the mechanism has not been fully understood. In the present study, the growth and mineral phosphate-solubilizing characteristics of PSB strain Burkholderia multivorans WS-FJ9 were investigated at six levels of exogenous soluble phosphate (0, 0.5, 1, 5, 10 and 20 mM). The WS-FJ9 strain showed better growth at high levels of soluble phosphate. The phosphate-solubilizing activity of WS-FJ9 reduced as the soluble phosphate concentration increased, as well as the production of pyruvic acid. Transcriptome profiling of WS-FJ9 at three levels of exogenous soluble phosphate (0, 5 and 20 mM) identified 446 differentially expressed genes, among which 44 genes were continuously up-regulated when soluble phosphate concentration increased and 81 genes were continuously down-regulated. Some genes related to cell growth were continuously up-regulated which would account for the better growth of WS-FJ9 at high levels of soluble phosphate. Genes involved in glucose metabolism, including glycerate kinase, 2-oxoglutarate dehydrogenase, and sugar ABC-type transporter were continuously down-regulated which indicates that metabolic channeling of glucose towards phosphorylative pathway was negatively regulated by soluble phosphate.

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Labeling Escherichia coli to saturation with 2.5 % of 15N ammonium in two conditions (aerobic and anaerobic) for benchmarking of protein-based stable isotope probing proteomics (Protein-SIP)

Project description:This dataset is part of a study aimed at developing algorithms for the quantification of stable isotope content in microorganisms after labeling them with stable isotope-labeled substrates. For this dataset Escherichia coli cultures were labeled with 2.5 % of 15N-labeled NH4Cl and grown either anaerobically or aerobically. Cultures of E. coli were grown in M9 minimal medium in which 2.5 % of the ammonium was replaced with 15N-labeled NH4Cl for >10 generations to achieve close to complete labeling of cells. Triplicate cultures were grown. Please note that the unlabeled ammonium that was used of course had a natural content of 15N of around 0.4 %, thus the 0% added label samples have an actual 15N content of 0.4 % and all added label is on top of this value. We included a tab delimited table with this submission providing details on all raw files.

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