title: Freshwater-borne bacteria isolated from a Malaysian rainforest waterfall exhibiting quorum sensing properties.
abstract: One obvious requirement for concerted action by a bacterial population is for an individual to be aware of and respond to the other individuals of the same species in order to form a response in unison. The term "quorum sensing" (QS) was coined to describe bacterial communication that is able to stimulate expression of a series of genes when the concentration of the signaling molecules has reached a threshold level. Here we report the isolation from aquatic environment of a bacterium that was later identified as Enterobacter sp.. Chromobacterium violaceum CV026 and Escherichia coli [pSB401] were used for preliminary screening of N-acyl homoserine lactone (AHL) production. The Enterobacter sp. isolated was shown to produce two types of AHLs as confirmed by analysis using high resolution tandem mass spectrometry. To the best of our knowledge, this is the first documentation of an Enterobacter sp. that produced both 3-oxo-C6-HSL and 3-oxo-C8-HSL as QS signaling molecules.
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. tmarilyn36@gmail.com.
authors.forename: Wen-Si
authors.initials: WS
authors.lastname: Tan
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. ninayusrina@hotmail.com.
authors.forename: Nina Yusrina Muhamad
authors.initials: NY
authors.lastname: Yunos
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. acelinetan38@yahoo.com.
authors.forename: Pui-Wan
authors.initials: PW
authors.lastname: Tan
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. zetty_mohamad@yahoo.com.
authors.forename: Nur Izzati
authors.initials: NI
authors.lastname: Mohamad
authors.affiliation: Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia. adrian_tan_1991@yahoo.com.
authors.forename: Tan-Guan-Sheng
authors.initials: TG
authors.lastname: Adrian
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*; D001681:Biological Assay / Q000295:instrumentation*; D004754:Enterobacter / Q000145:classification / Q000302:isolation & purification* / Q000502:physiology*; D005618:Fresh Water / Q000382:microbiology*; D008296:Malaysia; D053038:Quorum Sensing / Q000502:physiology*; D065947:Rainforest; D013045:Species Specificity
chemical_list: D054742:Acyl-Butyrolactones