نتایج جستجو برای: evils ahl

تعداد نتایج: 1328  

Journal: :Molecular microbiology 2003
Yi-Han Lin Jin-Ling Xu Jiangyong Hu Lian-Hui Wang Say Leong Ong Jared Renton Leadbetter Lian-Hui Zhang

N-acylhomoserine lactones (AHLs) are used as signal molecules by many quorum-sensing Proteobacteria. Diverse plant and animal pathogens use AHLs to regulate infection and virulence functions. These signals are subject to biological inactivation by AHL-lactonases and AHL-acylases. Previously, little was known about the molecular details underlying the latter mechanism. An AHL signal-inactivating...

2011
Live L Nesse Kristin Berg Lene K Vestby Ingrid Olsaker Berit Djønne

BACKGROUND In Gram-negative bacteria, the most commonly studied quorum sensing signals are the N-acylhomoserine lactones (AHLs). In Salmonella, AHLs are recognized by SdiA, which is believed to be a sensor of AHLs produced by other bacteria, since Salmonella does not produce AHLs itself. It has been speculated that AHLs produced by the gastrointestinal flora may influence the regulation of viru...

Journal: :Molecules 2005
Wai-Kean Goh Scott A Rice Naresh Kumar

N-acylated homoserine lactone (AHL) mediated cell-cell communication in bacteria is dependent on the recognition of the cognate signal by its receptor. This interaction allows the receptor-ligand complex to act as a transcriptional activator, controlling the expression of a range of bacterial phenotypes, including virulence factor expression and biofilm formation. One approach to determine the ...

2015
Sonja Voget Hilke Bruns Irene Wagner-Döbler Stefan Schulz Rolf Daniel

Roseovarius tolerans EL-164 is a member of the Roseobacter clade, a group of marine bacteria within the Alphaproteobacteria. It produces different N-acylhomoserine lactone (AHL) autoinducers as well as five AHL-related but functionally different compounds, the N-acylated alanine methyl esters. The size of the draft genome is 3,749,755 bp.

Journal: :reports of biochemistry and molecular biology 0
rohollah taghadosi department of microbiology and virology, kerman university of medical sciences, kerman, iran. mohammad reza shakibaie tel: +98 341- 9133408226; fax: +98 341- 3221671 shalaleh masoumi department of microbiology and virology, kerman university of medical sciences, kerman, iran.

background: n-acyl homoserine lactone (ahl) is found to be the main component of quorum sensing (qs) in gram-negative bacteria and plays an important role in biofilm formation. little information is available regarding the role of ahl in biofilm formation in escherichia coli (e. coli). the purpose of this investigation was to biochemically detect and characterize ahl activity in biofilm-forming...

Journal: :Environmental microbiology 2009
Silvia Schmidt Judith F Blom Jakob Pernthaler Gabriele Berg Adam Baldwin Eshwar Mahenthiralingam Leo Eberl

Members of the genus Burkholderia are known for their ability to suppress soil-borne fungal pathogens by the production of various antibiotic compounds. In this study we investigated the role of N-acylhomoserine lactone (AHL)-dependent quorum sensing (QS) in the expression of antifungal traits. Using a quorum quenching approach, that is, by heterologous expression of the Bacillus sp. AiiA lacto...

2016
Nishaben M. Patel Joseph D. Moore Helen E. Blackwell Daniel Amador-Noguez

N-acyl L-homoserine lactones (AHLs) constitute a predominant class of quorum-sensing signaling molecules used by Gram-negative bacteria. Here, we report a sensitive and non-targeted HPLC-MS/MS method based on parallel reaction monitoring (PRM) to identify and quantitate known, unanticipated, and novel AHLs in microbial samples. Using a hybrid quadrupole-high resolution mass analyzer, this metho...

Journal: :Bulletin of the Society for Near Eastern Studies in Japan 1989

2017
Hiroyuki Kusada Hideyuki Tamaki Yoichi Kamagata Satoshi Hanada Nobutada Kimura

N-Acylhomoserine lactone acylase (AHL acylase) is a well-known enzyme responsible for disrupting cell-cell communication (quorum sensing) in bacteria. Here, we isolated and characterized a novel and unique AHL acylase (designated MacQ) from a multidrug-resistant bacterium, Acidovorax sp. strain MR-S7. The purified MacQ protein heterologously expressed in Escherichia coli degraded a wide variety...

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