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Sensors 2012, 12(4), 4846-4859; doi:10.3390/s120404846

Characterization of Quorum Sensing and Quorum Quenching Soil Bacteria Isolated from Malaysian Tropical Montane Forest

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, 637616, Singapore
3
Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
*
Author to whom correspondence should be addressed.
Received: 15 March 2012 / Revised: 4 April 2012 / Accepted: 6 April 2012 / Published: 13 April 2012
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Abstract

We report the production and degradation of quorum sensing N-acyl-homoserine lactones by bacteria isolated from Malaysian montane forest soil. Phylogenetic analysis indicated that these isolates clustered closely to the genera of Arthrobacter, Bacillus and Pseudomonas. Quorum quenching activity was detected in six isolates of these three genera by using a series of bioassays and rapid resolution liquid chromatography analysis. Biosensor screening and high resolution liquid chromatography-mass spectrometry analysis revealed the production of N-dodecanoyl-L-homoserine lactone (C12-HSL) by Pseudomonas frederiksbergensis (isolate BT9). In addition to degradation of a wide range of N-acyl-homoserine lactones, Arthrobacter and Pseudomonas spp. also degraded p-coumaroyl-homoserine lactone. To the best of our knowledge, this is the first documentation of Arthrobacter and Pseudomonas spp. capable of degrading p-coumaroyl-homoserine lactone and the production of C12-HSL by P. frederiksbergensis. View Full-Text
Keywords: Arthrobacter; Bacillus; liquid chromatography mass spectrometry (LC-MS); N-acylhomoserine lactone; N-dodecanoyl-L-homoserine lactone; p-coumaroylhomoserine lactone; Pseudomonas frederiksbergensis; quorum quenching; quorum sensing; rapid resolution liquid chromatography (RRLC) Arthrobacter; Bacillus; liquid chromatography mass spectrometry (LC-MS); N-acylhomoserine lactone; N-dodecanoyl-L-homoserine lactone; p-coumaroylhomoserine lactone; Pseudomonas frederiksbergensis; quorum quenching; quorum sensing; rapid resolution liquid chromatography (RRLC)
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

Chong, T.-M.; Koh, C.-L.; Sam, C.-K.; Choo, Y.-M.; Yin, W.-F.; Chan, K.-G. Characterization of Quorum Sensing and Quorum Quenching Soil Bacteria Isolated from Malaysian Tropical Montane Forest. Sensors 2012, 12, 4846-4859.

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