Secondary Metabolites Produced by the Marine Bacterium Halobacillus salinus That Inhibit Quorum Sensing-Controlled Phenotypes in Gram-Negative Bacteria
TLDR
A marine gram-positive bacterium is presented that secretes secondary metabolites capable of quenching quorum sensing-controlled behaviors in several gram-negative reporter strains, and it is shown that these nontoxic metabolites may act as antagonists of bacterial quorum sensed by competing with N-acyl homoserine lactones for receptor binding.Abstract:
Certain bacteria use cell-to-cell chemical communication to coordinate community-wide phenotypic expression, including swarming motility, antibiotic biosynthesis, and biofilm production. Here we present a marine gram-positive bacterium that secretes secondary metabolites capable of quenching quorum sensing-controlled behaviors in several gram-negative reporter strains. Isolate C42, a Halobacillus salinus strain obtained from a sea grass sample, inhibits bioluminescence production by Vibrio harveyi in cocultivation experiments. With the use of bioassay-guided fractionation, two phenethylamide metabolites were identified as the active agents. The compounds additionally inhibit quorum sensing-regulated violacein biosynthesis by Chromobacterium violaceum CV026 and green fluorescent protein production by Escherichia coli JB525. Bacterial growth was unaffected at concentrations below 200 μg/ml. Evidence is presented that these nontoxic metabolites may act as antagonists of bacterial quorum sensing by competing with N-acyl homoserine lactones for receptor binding.read more
Citations
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References
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Journal ArticleDOI
Marine natural products.
TL;DR: This review covers the literature published in 2014 for marine natural products, with 1116 citations referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms.
Journal ArticleDOI
The involvement of cell-to-cell signals in the development of a bacterial biofilm
David G. Davies,Matthew R. Parsek,Matthew R. Parsek,Matthew R. Parsek,James P. Pearson,James P. Pearson,James P. Pearson,Barbara H. Iglewski,Barbara H. Iglewski,Barbara H. Iglewski,J. W. Costerton,J. W. Costerton,J. W. Costerton,E. P. Greenberg,E. P. Greenberg,E. P. Greenberg +15 more
TL;DR: The involvement of an intercellular signal molecule in the development of Pseudomonas aeruginosa biofilms suggests possible targets to control biofilm growth on catheters, in cystic fibrosis, and in other environments where P. aerug inosaBiofilms are a persistent problem.
Journal ArticleDOI
STUDIES ON LYSOGENESIS I.: The Mode of Phage Liberation by Lysogenic Escherichia coli
TL;DR: Observations on a lysogenic strain of Escherichia coli that carries more than one detectable type of phage that is associated with bacteriophage infection followed by lysis of the infected cell are reported.
Journal ArticleDOI
Quorum sensing and Chromobacterium violaceum: exploitation of violacein production and inhibition for the detection of N-acylhomoserine lactones
Kay H. McClean,Michael K. Winson,Leigh Fish,Adrian Taylor,Siri Ram Chhabra,Miguel Cámara,Mavis Daykin,John H. Lamb,Simon Swift,Barrie W. Bycroft,Gordon S. A. B. Stewart,Paul Williams +11 more
TL;DR: The ability of CV026 to respond to a series of synthetic AHL and N-acylhomocysteine thiolactone (AHT) analogues is explored, greatly extending the ability to detect a wide spectrum of AHL signal molecules.
Journal ArticleDOI
Regulation of Gene Expression by Cell-to-Cell Communication: Acyl-Homoserine Lactone Quorum Sensing
TL;DR: Recent studies have begun to integrate acyl-HSL quorum sensing into global regulatory networks and establish its role in developing and maintaining the structure of bacterial communities.