Abstract
Quorum sensing (QS) is a term used to describe cell-to-cell communication that enables bacteria to orchestrate group behaviours according to density of bacterial cells. In Gram-negative bacteria, this signalling system is widely known to regulate a variety of different phenotypes such as antibiotic production and biofilm formation. In this study, we report the production of N-acyl homoserine lactones produced by Chromobacterium haemolyticum strain KM2, a bacterium isolated from a river water of a reserved tropical national park. Preliminary screening of QS activity using biosensor reporter assays indicated that C. haemolyticum strain KM2 produces both short- and long-chain AHLs. Analysis with high-resolution liquid chromatography–mass spectrometry (LC–MS/MS) analysis revealed the production of three AHLs by strain KM2: N-octanoyl-l-homoserine lactone (C8-HSL), N-dodecanoyl-l-homoserine lactone (C12-HSL), and N-3-oxo-dodecanoyl-l-homoserine lactone (OC12-HSL). This bacterial isolate also exhibited strong β-haemolytic activity. To the best of our knowledge, this is the first documentation of QS activity and multiple AHLs production by C. haemolyticum strain KM2.
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Acknowledgements
We gratefully acknowledge University of Malaya for the High-Impact Research Grant (UM-MOHE HIR Grant UM.C/625/1/HIR/MOHE/CHAN/14/1, no. H-50001-A000027) awarded to Kok-Gan Chan and PPP Grant (PG081-2015B; to Kumutha Priya).
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Communicated by Erko Stackebrandt.
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Priya, K., Sulaiman, J., How, K.Y. et al. Production of N-acyl homoserine lactones by Chromobacterium haemolyticum KM2 isolated from the river water in Malaysia. Arch Microbiol 200, 1135–1142 (2018). https://doi.org/10.1007/s00203-018-1526-y
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DOI: https://doi.org/10.1007/s00203-018-1526-y