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Title of Journal: World J Microbiol Biotechnol

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Abbravation: World Journal of Microbiology and Biotechnology

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Springer Netherlands

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DOI

10.1007/s10657-010-9193-8

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1573-0972

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Coexistence of quorumquenching and quorumsensing

Authors: ChengSiang Wong WaiFong Yin YeunMun Choo ChoonKook Sam ChongLek Koh KokGan Chan
Publish Date: 2011/07/09
Volume: 28, Issue: 2, Pages: 453-461
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Abstract

A chemically defined medium called KGm medium was used to isolate from a sample of sea water a bacterial strain MW3A capable of using N3oxohexanoyllhomoserine lactone as the sole carbon source MW3A was clustered closely to Pseudomonas aeruginosa by 16S ribosomal DNA sequence analysis It degraded both Nacylhomoserine lactones AHLs with a 3oxo group substitution and less preferably AHLs with unsubstituted groups at C3 position in the acyl side chain as determined by Rapid Resolution Liquid Chromatography Its quiP and pvdQ homologue gene sequences showed high similarities to those of known acylases Spent supernatant of MW3A harvested at 8h post inoculation was shown to contain longchain AHLs when assayed with the biosensor Escherichia coli pSB1075 and specifically Ndodecanoyllhomoserine lactone and N3oxotetradecanoyllhomoserine lactone by high resolution mass spectrometry Hence we report here a novel marine P aeruginosa strain MW3A possessing both quorumquenching and quorumsensing propertiesThis work was supported by a High Impact Research Grant J0000073552 and the Malaysia Ministry of Science Technology and Innovation under the Science Fund 1202032085 to KG Chan and a Postgraduate Research Grant PS256/2008A to CS Wong from the University of Malaya

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