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Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia





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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





Autor: Jia-Yi Tan, Wai-Fong Yin and Kok-Gan Chan *

Fuente: http://mdpi.com/



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