Potential for luxS related signalling in marine bacteria and production of autoinducer-2 in the genus Shewanella.

BMC Microbiology
Agnes M BodorIrene Wagner-Döbler

Abstract

The autoinducer-2 (AI-2) group of signalling molecules are produced by both Gram positive and Gram negative bacteria as the by-product of a metabolic transformation carried out by the LuxS enzyme. They are the only non species-specific quorum sensing compounds presently known in bacteria. The luxS gene coding for the AI-2 synthase enzyme was found in many important pathogens. Here, we surveyed its occurrence in a collection of 165 marine isolates belonging to abundant marine phyla using conserved degenerated PCR primers and sequencing of selected positive bands to determine if the presence of the luxS gene is phylogenetically conserved or dependent on the habitat. The luxS gene was not present in any of the Alphaproteobacteria (n = 71) and Bacteroidetes strains (n = 29) tested; by contrast, these bacteria harboured the sahH gene, coding for an alternative enzyme for the detoxification of S-adenosylhomocysteine (SAH) in the activated methyl cycle. Within the Gammaproteobacteria (n = 76), luxS was found in all Shewanella, Vibrio and Alteromonas isolates and some Pseudoalteromonas and Halomonas species, while sahH was detected in Psychrobacter strains. A number of Gammaproteobacteria (n = 27) appeared to have neither the luxS nor ...Continue Reading

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Citations

Jan 7, 2009·Applied and Environmental Microbiology·Deric R LearmanMichael F Hochella
Jun 15, 2011·BMC Research Notes·Agnes M BodorIrene Wagner-Döbler
Oct 30, 2013·Current Microbiology·Iram LiaqatRobert G J Edyvean
Oct 12, 2014·International Journal of Food Microbiology·Suqin ZhuYing Wang
Feb 13, 2018·Journal of Applied Microbiology·T-N WangP-Y Hong
Sep 25, 2018·Environmental Microbiology Reports·Jorge AntunesVitor Vasconcelos
Aug 17, 2019·Frontiers in Microbiology·Anne TournerocheSoizic Prado

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Methods Mentioned

BETA
PCR
biosensor
PCRs

Software Mentioned

CoDeHOP
BLAST
ClustalW

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