The Rhodococcus erythropolis strain W2 has been shown previously to degrade the N-acylhomoserine lactone (AHL) quorum-sensing signal molecule N-hexanoyl-L-homoserine lactone, produced by other bacteria. Data presented here indicate that this Gram-positive bacterium is also capable of using various AHLs as the sole carbon and energy source. The enzymic activities responsible for AHL inactivation...

objectives: in present study we aimed to clone the lux i gene encoding n-acyl-homoserine synthase detected in biofilm forming clinical isolates of acinetobacter baumannii and study its expression in escherichia coli transformants. materials and methods: four a. baumannii hospital strains which demonstrated strong biofilm activity were selected in this investigation. the presence of lux i gene w...

Production of phenazine antibiotics by the biological control bacterium Pseudomonas aureofaciens 30-84 is regulated in part by the PhzI/PhzR N-acyl-homoserine lactone (AHL) response system (L. S. Pierson III, V. D. Keppenne, and D. W. Wood, J. Bacteriol. 176:3966-3974, 1994; D. W. Wood and L. S. Pierson III, Gene 168:49-53, 1996). Two mutants, 30-84W and 30-84.A2, were isolated and were found t...

24 The principal inhibitory neurotransmitter in the mammalian cochlear nucleus (CN) is glycine. During 25 age-related hearing loss (AHL), glycinergic inhibition becomes weaker in CN. However, it is unclear what 26 aspects of glycinergic transmission are responsible for weaker inhibition with AHL. We examined 27 glycinergic transmission onto bushy cells of the anteroventral CN in normal hearing ...

Many species of gram-negative bacteria communicate by synthesizing, secreting, and responding to N-acylhomoserine lactones (AHLs), a mechanism termed quorum sensing. Several investigations have characterized numerous AHL-degrading enzymes (AiiA lactonases) encoded by environmental isolates of Bacillus spp. The Burkholderia thailandensis quorum system is comprised of at least three AHL synthases...

N-acyl-homoserine lactones (AHLs) are the main quorum-sensing (QS) signals in gram-negative bacteria. AHLs trigger the expression of genes for particular biological functions when their density reaches a threshold. In this study, we identified and cloned the qsdH gene by screening a genomic library of Pseudoalteromonas byunsanensis strain 1A01261, which has AHL-degrading activity. The qsdH gene...

Sulfate-reducing bacteria (SRB) are anaerobic that form biofilm and induce corrosion on various material surfaces. The quorum sensing (QS) system employs acyl homoserine lactone (AHL)-type QS molecules primarily govern formation. Studies SRB have reported the presence of AHL, but no AHL synthase been annotated in so far. In this computational study, we used a combination data mining, multiple s...

On request of the EU Commission EFSA carried out a Extensive Literature Review (ELR) to provide list vector species or reservoirs pathogens fish, crustaceans, and molluscs, listed in Annex II AHL, aiming update Implementing Regulation (EU) 2018/1882. In this External Scientific Report, ELR assessment potential reservoir is described mollusc AHL: Marteilia refringens, Bonamia exitiosa, ostreae, ...

Abstract Plants have developed numerous strategies for responding to abiotic and biotic stresses. In particular, the microbiota surrounding plants may a positive effect on plant stress responses. One is reaction rhizobacteria, which can lead induced systemic resistance. Gram-negative soil bacteria that produce N -acyl homoserine lactones (AHL), example, Ensifer meliloti , induce primed state in...

In this article, the climatological state and seasonal variability of Arabian heat low (AHL) intertropical discontinuity (ITD) are investigated over Peninsula using 1979–2019 ERA-5 reanalysis data. The AHL is a summertime feature, mostly at 15°–35°N 40°–60°E, exhibiting clear strengthening last four decades in line with observed increase surface temperature. However, no shift its position detec...