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Sensors 2014, 14(4), 6788-6796; doi:10.3390/s140406788

Quorum Sensing Activity of Hafnia alvei Isolated from Packed Food

Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
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Received: 2 March 2014 / Revised: 2 April 2014 / Accepted: 8 April 2014 / Published: 14 April 2014
(This article belongs to the Section Biosensors)
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Abstract

Quorum sensing (QS) is a mechanism adopted by bacteria to regulate expression of genes according to population density. N-acylhomoserine lactones (AHLs) are a type of QS signalling molecules commonly found in Gram-negative bacteria which have been reported to play a role in microbial spoilage of foods and pathogenesis. In this study, we isolated an AHL-producing Hafnia alvei strain (FB1) from spherical fish pastes. Analysis via high resolution triple quadrupole liquid chromatography/mass spectrometry (LC/MS) on extracts from the spent supernatant of H. alvei FB1 revealed the existence of two short chain AHLs: N-(3-oxohexanoyl) homoserine lactone (3-oxo-C6-HSL) and N-(3-oxo- octanoyl) homoserine lactone (3-oxo-C8-HSL). To our knowledge, this is the first report of the production of AHLs, especially 3-oxo-C8-HSL, by H. alvei. View Full-Text
Keywords: Hafnia alvei; mass spectrometry; N-acylhomoserine lactone; N-(3-oxohexanoyl) homoserine lactone; N-(3-oxooctanoyl) homoserine lactone; quorum sensing; fish products; food spoilage; food microbiology; food safety Hafnia alvei; mass spectrometry; N-acylhomoserine lactone; N-(3-oxohexanoyl) homoserine lactone; N-(3-oxooctanoyl) homoserine lactone; quorum sensing; fish products; food spoilage; food microbiology; food safety
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Tan, J.-Y.; Yin, W.-F.; Chan, K.-G. Quorum Sensing Activity of Hafnia alvei Isolated from Packed Food. Sensors 2014, 14, 6788-6796.

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