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LuxS distribution and AI‐2 activity of Campylobacter spp.
Author(s) -
Gölz G.,
Adler L.,
Huehn S.,
Alter T.
Publication year - 2012
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/j.1365-2672.2011.05221.x
Subject(s) - campylobacter , microbiology and biotechnology , biology , bacteria , genetics
Aims: This study investigates the distribution of LuxS within Campylobacter ( Camp. ) species and Autoinducer (AI)‐2 activity of Camp. jejuni NCTC 11168 in food matrices. Methods and Results: LuxS ( S ‐ribosylhomocysteinase) sequences of different Campylobacter spp. were compared, and AI‐2 activity was measured with an AI‐2 reporter assay. Highest LuxS homologies were shared by Camp. jejuni , Camp. coli and Camp. upsaliensis, and their LuxS sequences had more similarities to the analysed Arcobacter and Vibrio harveyi strains than to all other analysed Campylobacter species. Of 15 analysed species only Camp. lari , Camp. peloridis and Camp. insulaenigrae did not produce AI‐2 molecules. Cultivation of Camp. jejuni NCTC 11168 in chicken juice reduced AI‐2 activity, and this reduction is not because of lower lux S expression or functionality. Conclusion: Not all Campylobacter species encode lux S. Food matrices can reduce AI‐2 activity in a LuxS‐independent manner. Significance and Impact of the Study: Besides, Camp. lari , Camp. peloridis and Camp. insulaenigrae do not show AI‐2 activity. Further investigations should clarify the function of AI‐2 in Campylobacter spp. and how species lacking lux S could overcome this alteration. Furthermore, the impact of food matrices on these functions needs to be determined as we could show that chicken juice reduced AI‐2 activity.