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Sensors 2014, 14(7), 11595-11604; doi:10.3390/s140711595

Pseudomonas cremoricolorata Strain ND07 Produces N-acyl Homoserine Lactones as Quorum Sensing Molecules

1
Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
2
Natural Sciences and Science Education AG, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Singapore
*
Author to whom correspondence should be addressed.
Received: 28 May 2014 / Revised: 19 June 2014 / Accepted: 26 June 2014 / Published: 30 June 2014
(This article belongs to the Section Biosensors)
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Abstract

Quorum sensing (QS) is a bacterial cell-to-cell communication system controlling QS-mediated genes which is synchronized with the population density. The regulation of specific gene activity is dependent on the signaling molecules produced, namely N-acyl homoserine lactones (AHLs). We report here the identification and characterization of AHLs produced by bacterial strain ND07 isolated from a Malaysian fresh water sample. Molecular identification showed that strain ND07 is clustered closely to Pseudomonas cremoricolorata. Spent culture supernatant extract of P. cremoricolorata strain ND07 activated the AHL biosensor Chromobacterium violaceum CV026. Using high resolution triple quadrupole liquid chromatography-mass spectrometry, it was confirmed that P. cremoricolorata strain ND07 produced N-octanoyl-l-homoserine lactone (C8-HSL) and N-decanoyl-l-homoserine lactone (C10-HSL). To the best of our knowledge, this is the first documentation on the production of C10-HSL in P. cremoricolorata strain ND07.
Keywords: cell-to-cell communication; mass spectrometry; triple quadrupole liquid chromatography mass spectrometry; N-octanoyl-l-homoserine lactone (C8-HSL); N-decanoyl-l-homoserine lactone (C10-HSL); Pseudomonas cremoricolorata cell-to-cell communication; mass spectrometry; triple quadrupole liquid chromatography mass spectrometry; N-octanoyl-l-homoserine lactone (C8-HSL); N-decanoyl-l-homoserine lactone (C10-HSL); Pseudomonas cremoricolorata
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Yunos, N.Y.M.; Tan, W.-S.; Koh, C.-L.; Sam, C.-K.; Mohamad, N.I.; Tan, P.-W.; Adrian, T.-G.-S.; Yin, W.-F.; Chan, K.-G. Pseudomonas cremoricolorata Strain ND07 Produces N-acyl Homoserine Lactones as Quorum Sensing Molecules. Sensors 2014, 14, 11595-11604.

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