Linked Life Data

19500143

Source:http://linkedlifedata.com/resource/pubmed/id/19500143

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2009-11-9
pubmed:abstractText
To identify genes essential to biofilm formation in Pseudomonas putida KT2440, 12 mutants defective in oxidative stress-related or metabolic pathway-related genes were evaluated. Of them, only the dsbA mutant lacking the disulfide bond isomerase exhibited significantly increased attachment to the polystyrene surface. Visual evaluation by extracellular matrix staining and scanning electron microscopy indicated that the KT2440-DeltadsbA strain displays enhanced extracellular matrix production, rugose colony morphology on agar plates and floating pellicles in static culture. Accordingly, we propose that deletion of the dsbA gene may stimulate production of the extracellular matrix, resulting in those phenotypes. In addition, the lack of detectable fluorescence in the KT2440-DeltadsbA under UV light as well as in both the wild type and the KT2440-DeltadsbA when grown on Luria-Bertani plates containing ferrous iron suggests that the fluorescent molecule may be a fluorescent siderophore with its synthesis/secretion controlled by DsbA in KT2440. These phenotypic defects observed in the dsbA mutant were complemented by the full-length KT2440 and Escherichia coli dsbA genes. In contrast to the role of DsbA in other bacteria, our results provide the first evidence that disruption of P. putida KT2440 dsbA gene overproduces the extracellular matrix and thus promotes biofilm formation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1574-6968
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
297
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
38-48
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Inactivation of the Pseudomonas putida KT2440 dsbA gene promotes extracellular matrix production and biofilm formation.
pubmed:affiliation
Division of Environmental Science and Ecological Engineering, Korea University, Seoul, South Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't