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• W2127373523 endingPage "5602" @default.
• W2127373523 startingPage "5592" @default.
• W2127373523 abstract "ABSTRACT Pseudomonas aeruginosa exhibits swarming motility on semisolid surfaces (0.5 to 0.7% agar). Swarming is a more than just a form of locomotion and represents a complex adaptation resulting in changes in virulence gene expression and antibiotic resistance. In this study, we used a comprehensive P. aeruginosa PA14 transposon mutant library to investigate how the complex swarming adaptation process is regulated. A total of 233 P. aeruginosa PA14 transposon mutants were verified to have alterations in swarming motility. The swarming-associated genes functioned not only in flagellar or type IV pilus biosynthesis but also in processes as diverse as transport, secretion, and metabolism. Thirty-three swarming-deficient and two hyperswarming mutants had transposon insertions in transcriptional regulator genes, including genes encoding two-component sensors and response regulators; 27 of these insertions were newly identified. Of the 25 regulatory mutants whose swarming motility was highly impaired (79 to 97%), only 1 (a PA1458 mutant) had a major defect in swimming, suggesting that this regulator might influence flagellar synthesis or function. Twitching motility, which requires type IV pili, was strongly affected in only two regulatory mutants ( pilH and PA2571 mutants) and was moderately affected in three other mutants ( algR , ntrB , and nosR mutants). Microarray analyses were performed to compare the gene expression profile of a swarming-deficient PA3587 mutant to that of the wild-type PA14 strain under swarming conditions. PA3587 showed 63% homology to metR , which encodes a regulator of methionine biosynthesis in Escherichia coli . The observed dysregulation in the metR mutant of nine different genes required for swarming motility provided a possible explanation for the swarming-deficient phenotype of this mutant." @default.
• W2127373523 created "2016-06-24" @default.
• W2127373523 creator A5006604811 @default.
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• W2127373523 date "2009-09-15" @default.
• W2127373523 modified "2023-10-16" @default.
• W2127373523 title "Swarming of <i>Pseudomonas aeruginosa</i> Is Controlled by a Broad Spectrum of Transcriptional Regulators, Including MetR" @default.
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• W2127373523 doi "https://doi.org/10.1128/jb.00157-09" @default.
• W2127373523 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2737960" @default.
• W2127373523 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19592586" @default.
• W2127373523 hasPublicationYear "2009" @default.
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