Transcriptome record of Pseudomonas aeruginosa PA14 cultivated in liquid minimal medium under influence of serine hydroxamate.
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PROVIDER: PRJNA1193093 | ENA |
REPOSITORIES: ENA
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Project description:Transcriptomic analysis of Pseudomonas aeruginosa PA14 in liquid minimal medium with serine hydroxamate.
2024-12-06 | GSE283319 | GEO
Project description:To investigate the impact of adenosine on gene expression of wild-type PA14.
2012-05-23 | GSE29665 | GEO
Project description:To investigate the impact of adenosine on gene expression of wild-type PA14. To investigate the impact of adenosine on gene expression of wild-type PA14, cells were harvested after incubating for 7 h in LB medium and LB with 10 mM adenosine medium, and RNA was extracted with the RNeasy Mini Kit (Qiagen, Valencia, CA) using a bead beater (Biospec, Bartlesville, OK ) with RNAlater buffer (Applied Biosystems, Foster City, CA) to stabilize the RNA.
2012-05-22 | E-GEOD-29665 | biostudies-arrayexpress
Project description:Pseudomonas aeruginosa airway infection is the leading cause of morbidity and mortality in cystic fibrosis (CF) patients. In vitro models that closely mimic CF sputum are needed to improve understanding of the pathobiology of P. aeruginosa in the CF airway. We developed an artificial sputum medium (ASMDM) that more closely resembles the composition of CF sputum than current media. In order to validate the utility of ASMDM, we used GeneChip microarrays to compare expression data of P. aeruginosa UCBPP-PA14 (PA14) in ASMDM with published data for this strain grown under the same conditions in an artificial medium containing 10% (v/v) CF sputum. Thirty-seven of 39 nutrition-related genes were differentially expressed in the same manner in both media. However, 24 quorum-sensing (QS) genes, 23 Type III secretion system and several anaerobic respiration genes were more highly expressed in ASMDM than in sputum-containing medium. When grown to stationary phase in ASMDM, PA14 differentially expressed about 50 biologically significant genes compared to stationary phase growth in Luria Broth; genes involved in iron acquisition (pfeA, fepC) and in assimilatory nitrate reduction (nasC, nirD) were upregulated, while 24 QS genes, including the regulator rhlR, lasA, rsaL, aprADEI and phenazine genes phzC2DD2EG2 were downregulated. Downregulation of QS-regulated virulence genes has been noted in chronic P. aeruginosa infection. ASMDM thus appears highly suitable for studies on gene expression of (i) P. aeruginosa strains from acutely and chronically infected CF patients and (ii) established biofilms that are a hallmark of advanced CF lung disease.
2010-05-31 | GSE18594 | GEO
Project description:Pseudomonas aeruginosa PA14 isolate:PA14 Genome sequencing
| PRJNA1028549 | ENA
Project description:Pseudomonas aeruginosa airway infection is the leading cause of morbidity and mortality in cystic fibrosis (CF) patients. In vitro models that closely mimic CF sputum are needed to improve understanding of the pathobiology of P. aeruginosa in the CF airway. We developed an artificial sputum medium (ASMDM) that more closely resembles the composition of CF sputum than current media. In order to validate the utility of ASMDM, we used GeneChip microarrays to compare expression data of P. aeruginosa UCBPP-PA14 (PA14) in ASMDM with published data for this strain grown under the same conditions in an artificial medium containing 10% (v/v) CF sputum. Thirty-seven of 39 nutrition-related genes were differentially expressed in the same manner in both media. However, 24 quorum-sensing (QS) genes, 23 Type III secretion system and several anaerobic respiration genes were more highly expressed in ASMDM than in sputum-containing medium. When grown to stationary phase in ASMDM, PA14 differentially expressed about 50 biologically significant genes compared to stationary phase growth in Luria Broth; genes involved in iron acquisition (pfeA, fepC) and in assimilatory nitrate reduction (nasC, nirD) were upregulated, while 24 QS genes, including the regulator rhlR, lasA, rsaL, aprADEI and phenazine genes phzC2DD2EG2 were downregulated. Downregulation of QS-regulated virulence genes has been noted in chronic P. aeruginosa infection. ASMDM thus appears highly suitable for studies on gene expression of (i) P. aeruginosa strains from acutely and chronically infected CF patients and (ii) established biofilms that are a hallmark of advanced CF lung disease. PA14 was grown in four different ways: 1. Logarithmic growth for early gene expression Cells were grown in MOPS-Glucose and separately in ASMDM. The average of two biological duplicates in each case was compared to the other to determine differential gene expression. 2. Stationary phase growth for gene expression Cells were grown in Luria Broth and separately in ASMDM. The average of two biological duplicates in each case was compared to the other to determine differential gene expression.
2010-06-08 | E-GEOD-18594 | biostudies-arrayexpress
Project description:Pseudomonas aeruginosa causes many biofilm infections, and the rugose small-colony variants (RSCVs) of this bacterium are important for infection. We found here that mutation in glyA2 (PA2444), which encodes a serine hydroxymethyltransferase, leads to the RSCV phenotype. The phenotype is related to increased c-di-GMP concentrations and depends on an active Wsp chemosensory system, including a diguanylate cyclase WspR. By characterizing the PA2444 enzyme both in vivo and in vitro, we determined the physiological function of PA2444 and related the enzyme to S-adenosylmethionine concentrations and the methylation of a membrane bound methyl-accepting chemotaxis protein WspA. A transcriptome analysis revealed the possible relationship between PA2444 and the redox state of the cells. Hence, we provide a mechanism for how an enzyme of central metabolism controls the community behavior of the bacterium. The P. aeruginosa genome array (Affymetrix, P/N 510596) was used to investigate differential gene expression in biofilm cells between PA14 and the PA2444 mutant. Biofilm cells were harvested from 10 g of glass wool after incubation for 7 h in LB with shaking at 250 rpm, and RNA was extracted with the RNeasy Mini Kit (Qiagen, Valencia, CA) using a bead beater (Biospec, Bartlesville, OK ) with RNAlater buffer (Applied Biosystems, Foster City, CA) to stabilize the RNA. For each binary microarray comparison of differential genes expression, if the gene with the larger transcription rate did not have a consistent transcription rate based on the 13 probe pairs (P-value less than 0.05), these genes were discarded. A gene was considered differentially expressed when the P-value for comparing two chips was lower than 0.05 (to assure that the change in gene expression was statistically significant and that false positives arise less than 5%) and when the expression ratio was higher than the standard deviation for the whole microarrays (1.8 for PA14 wild-type and PA2444).
2013-06-08 | E-GEOD-29879 | biostudies-arrayexpress
Project description:PA14-PA2444 vs. PA14-WT biofilm cells
| PRJNA140729 | ENA
Project description:Five biological repeats of P.aeruginosa PA14 and five biological repeats of P.aeruginosa PA14 metR::phoA were grown in liquid BM2 swarming media containing 62mM potassium phosphate buffer [pH7], 2 mM MgSO4, 10uM FeSO4, 0.4% (wt/vol) glucose, and 0.1% (wt/vol) casamino acids. Microarray experiments were done using microarray slides and protocols from TIGR on samples taken from mid-log phase (OD600 0.4-0.5)cells.
2009-08-20 | E-FPMI-19 | biostudies-arrayexpress
Project description:Pseudomonas aeruginosa isolate:PA14,tpiA | cultivar:PA14 Raw sequence reads
| PRJNA574120 | ENA