title: Quorum sensing activity of Serratia fonticola strain RB-25 isolated from an ex-landfill site.
abstract: Quorum sensing is a unique bacterial communication system which permits bacteria to synchronize their behaviour in accordance with the population density. The operation of this communication network involves the use of diffusible autoinducer molecules, termed N-acylhomoserine lactones (AHLs). Serratia spp. are well known for their use of quorum sensing to regulate the expression of various genes. In this study, we aimed to characterized the AHL production of a bacterium designated as strain RB-25 isolated from a former domestic waste landfill site. It was identified as Serratia fonticola using matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry analysis and this was confirmed by 16S ribosomal DNA sequencing. High resolution triple quadrupole liquid chromatography-mass spectrometry analysis of S. fonticola strain RB-25 spent culture supernatant indicated the existence of three AHLs namely: N-butyryl-L-homoserine lactone (C4-HSL), N-hexanoyl-L-homoserine lactone (C6-HSL) and N-(3-oxohexanoyl) homoserine-lactone (3-oxo-C6 HSL). This is the first report of the production of these AHLs in S. fonticola.
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. robsonee@live.com.
authors.forename: Robson
authors.initials: R
authors.lastname: Ee
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. yanluelim@hotmail.com.
authors.forename: Yan-Lue
authors.initials: YL
authors.lastname: Lim
authors.affiliation: Centre of Excellence for Research in AIDS (CERiA), Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia. k2tee@um.edu.my.
authors.forename: Kok-Keng
authors.initials: KK
authors.lastname: Tee
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. yinwaifong@yahoo.com.
authors.forename: Wai-Fong
authors.initials: WF
authors.lastname: Yin
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. kokgan@um.edu.my.
authors.forename: Kok-Gan
authors.initials: KG
authors.lastname: Chan
mesh_terms: D054742:Acyl-Butyrolactones / Q000378:metabolism; D015374:Biosensing Techniques; D008969:Molecular Sequence Data; D010802:Phylogeny; D053038:Quorum Sensing; D012705:Serratia / Q000302:isolation & purification* / Q000378:metabolism*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D064091:Waste Disposal Facilities
chemical_list: D054742:Acyl-Butyrolactones