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Quorum Sensing and Chromobacterium violaceum: Exploitation of Violacein Production and Inhibition for the Detection of N-Acylhomoserine Lactones [PDF]

Microbiology (United Kingdom), 1997
Quorum sensing relies upon the interaction of a diffusible signal molecule with a transcriptional activator protein to couple gene expression with cell population density. In Gram-negative bacteria, such signal molecules are usually N-acylhomoserine lactones (AHLs) which differ in the structure of their N-acyl side chains.
Simon Swift, Paul Williams, Miguel Camara   +2 more
exaly   +3 more sources

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Plants genetically modified to produce N-acylhomoserine lactones communicate with bacteria

Nature Biotechnology, 1999
N-acylhomoserine lactones (AHLs) play a critical role in plant/microbe interactions. The AHL, N-(3-oxohexanoyl)-L-homoserine lactone (OHHL), induces exoenzymes that degrade the plant cell wall by the pathogenic bacterium Erwinia carotovora. Conversely, the antifungal activity of the biocontrol bacterium Pseudomonas aureofaciens 30-84 is due (at least ...
R G, Fray, J P, Throup, M, Daykin, A, Wallace, P, Williams, G S, Stewart, D, Grierson   +6 more
openaire   +2 more sources

N-Acylhomoserine lactone-mediated quorum sensing regulates biofilm structure in Methylobacterium populi P-1M, an isolate from a pink-pigmented household biofilm

Bioscience, biotechnology and biochemistry, 2019
Numerous gram-negative bacteria have quorum-sensing systems and produce AHL as a quorum-sensing signal molecule. In this study, we demonstrated that Methylobacterium populi P-1M, an isolate from a pink-pigmented household biofilm, produced two AHLs, C14 ...
Tomohiro Morohoshi, Xiao-Nan Xie, T. Ikeda   +2 more
semanticscholar   +1 more source

N-acylhomoserine lactone-degrading Bacillus strains isolated from aquaculture animals

Aquaculture, 2011
Abstract Infections caused by antibiotic-resistant pathogenic bacteria can cause considerable losses in aquaculture. Many aquaculture pathogens regulate the expression of virulence genes through quorum sensing, bacterial cell-to-cell communication with small signal molecules. N-acyl homoserine lactones (AHLs) are the most extensively studied class of
Tom Defoirdt, Loan Doan Thanh, Bart Van Delsen, Peter De Schryver, Patrick Sorgeloos, Nico Boon, Peter Bossier   +6 more
openaire   +1 more source

Facile Preparation of Deuterium-Labeled N-Acylhomoserine Lactones as Internal Standards for Isotope Dilution Mass Spectrometry

Bioorganic and Medicinal Chemistry, 2010
N-Acylhomoserine lactones (AHLs) are widely conserved signal molecules that mediate quorum sensing in Gram-negative bacteria. In this study, deuterium-labeled AHLs were prepared for use as internal standards for isotope dilution mass spectrometry. Their utility in the sensitive and precise quantification of AHLs in culture supernatants of bacteria by ...
Kenji Kai, Hideo Hayashi
exaly   +3 more sources

Roles of ATP-Dependent N-Acylhomoserine Lactones (AHLs) and Extracellular Polymeric Substances (EPSs) in Aerobic Granulation

Chemosphere, 2012
Aerobic granules which form through a cell-to-cell self-immobilization process have been intensively studied and developed for wastewater biotreatment. However, the microbiological origin of this phenomenon is still largely unknown. This study investigated the possible role of metabolic energy in the development of aerobic granules. Results showed that
Yu Liu
exaly   +5 more sources

Synthesis of Multiple N-Acylhomoserine Lactones is Wide-spread Among the Members of the Burkholderia cepacia Complex

Systematic and Applied Microbiology, 2001
Seventy strains of the Burkholderia cepacia complex, which currently comprises six genomic species, were tested for their ability to produce N-acylhomoserine lactone (AHL) signal molecules. Using thin layer chromatography in conjunction with a range of AHL biosensors, we show that most strains primarily produce two AHLs, namely N-octanoylhomoserine ...
A, Gotschlich, B, Huber, O, Geisenberger, A, Tögl, A, Steidle, K, Riedel, P, Hill, B, Tümmler, P, Vandamme, B, Middleton, M, Camara, P, Williams, A, Hardman, L, Eberl   +13 more
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Discovering Additional Chemical and Biological Functions for 3-Oxo-N-Acylhomoserine Lactones

2010
Introduction The term quorum sensing has been coined to describe the ability of a population of unicellular bacteria to act as a multicellular organism in a cell-density-dependent manner, that is, a way to sense “how many are out there” [1]. Bacteria use small diffusible molecules to exchange information amongst themselves.
Gunnar F. Kaufmann, Rafaella Sartorio, Sang-Hyeup Lee, Claude J. Rogers, Michael M. Meijler, Jason A. Moss, Bruce Clapham, Andrew P. Brogan, Tobin J. Dickerson, Kim D. Janda   +9 more
openaire   +1 more source

Design, synthesis and biological evaluation of triazole, sulfonamide and sulfonyl urea derivatives of N-acylhomoserine lactone as quorum sensing inhibitors

Journal of Molecular Structure, 2023
Upasana Yadav, Kothula Devender, M. Poornima, Cheemalamarri Chandra Sekhar, K. Atcha, B. Subba Reddy, P. Padmaja   +6 more
semanticscholar   +1 more source

6.12 Detection, Purification, and Synthesis of n-acylhomoserine Lactone Quorum Sensing Signal Molecules

1998
Publisher Summary This chapter describes the most relevant practical approaches for the identification and characterization of the N-acylhomoserine lactones (AHL) family of quorum sensing signal molecules. The first indication of AHL-mediated gene regulation in a Gram-negative bacterial pathogen is the appearance of a specific phenotype in a cell ...
Miguel Càmara, Mavis Daykin, Siri Ram Chhabra   +2 more
openaire   +1 more source