Results 41 to 50 of about 14,518 (211)

Evidence of autoinducer activity in naturally occurring biofilms [PDF]

FEMS Microbiology Letters, 2006
N-Acyl homoserine lactone (AHL) molecules have been shown to act as mediators of population density-dependent (quorum-sensing) gene expression in numerous Gram-negative bacteria. Functions associated with AHL include light production in Vibrio fischeri, expression of virulence factors in Pseudomonas aeruginosa, and conjugation in Agrobacterium ...
R J, McLean, M, Whiteley, D J, Stickler, W C, Fuqua   +3 more
openaire   +2 more sources

Black Queen Hypothesis, partial privatization, and quorum sensing evolution

PLoS ONE, 2022
Microorganisms produce costly cooperative goods whose benefit is partially shared with nonproducers, called ‘mixed’ goods. The Black Queen Hypothesis predicts that partial privatization has two major evolutionary implications.
Lucas Santana Souza, Yasuhiko Irie, Shigetoshi Eda   +2 more
doaj   +2 more sources

Ecological feedback in quorum-sensing microbial populations can induce heterogeneous production of autoinducers

eLife, 2017
Autoinducers are small signaling molecules that mediate intercellular communication in microbial populations and trigger coordinated gene expression via ‘quorum sensing’.
Matthias Bauer, Johannes Knebel, Matthias Lechner, Peter Pickl, Erwin Frey   +4 more
doaj   +1 more source

Spatial Dispersal of Bacterial Colonies Induces a Dynamical Transition From Local to Global Quorum Sensing

, 2016
Bacteria communicate using external chemical signals called autoinducers (AI) in a process known as quorum sensing (QS). QS efficiency is reduced by both limitations of AI diffusion and potential interference from neighboring strains.
Boedicker, James Q., Yusufaly, Tahir I.
core   +1 more source

Autoinducer 2 Affects Biofilm Formation byBacillus cereus [PDF]

Applied and Environmental Microbiology, 2006
ABSTRACTCell-free supernatants from growingBacillus cereusstrain ATCC 10987 induced luminescence in aPhotorhabdus luminescensΔluxSmutant, indicating the production of functional autoinducer 2 (AI-2). The exogenous addition of in vitro synthesized AI-2 had an inhibitory effect on biofilm formation byB.
Auger, Sandrine, Krin, E., Aymerich, Stéphane, Gohar, M.   +3 more
openaire   +5 more sources

Regulation of autoinducer production in Salmonella typhimurium [PDF]

Molecular Microbiology, 1999
Salmonella typhimurium strain LT2 secretes an organic signalling molecule that can be assayed by its ability to activate one of two specific quorum‐sensing systems in Vibrio harveyi. Maximal activity is produced during mid‐ to late exponential phase when S. typhimurium is grown in the presence of glucose or other preferred carbohydrates. The signal is
M G, Surette, B L, Bassler
openaire   +2 more sources

Queuing models for abstracting interactions in Bacterial communities

, 2016
Microbial communities play a significant role in bioremediation,plant growth,human and animal digestion,global elemental cycles including the carbon-cycle,and water treatment.They are also posed to be the engines of renewable energy via microbial fuel ...
Boedicker, James, El-Naggar, Mohamed Y., Michelusi, Nicolò, Mitra, Urbashi   +3 more
core   +1 more source

Peptides as quorum sensing molecules : measurement techniques and obtained levels in vitro and in vivo [PDF]

, 2017
The expression of certain bacterial genes is regulated in a cell-density dependent way, a phenomenon called quorum sensing. Both Gram-negative and Gram-positive bacteria use this type of communication, though the signal molecules (auto-inducers) used by ...
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core   +2 more sources

PtrA is functionally intertwined with GacS in regulating the biocontrol activity of Pseudomonas chlororaphis PA23

Frontiers in Microbiology, 2016
In vitro inhibition of the fungal pathogen Sclerotinia sclerotiorum by Pseudomonas chlororaphis PA23 is reliant upon a LysR-type transcriptional regulator (LTTR) called PtrA. In the current study, we show that Sclerotinia stem rot and leaf infection are
Nidhi Shah, Natasha Klaponski, Carrie Selin, Rachel Rudney, DILANTHA FERNANDO, Mark Findlay Belmonte, Teresa Rebecca De Kievit   +6 more
doaj   +1 more source

Promoter selectivity of the RhlR quorum-sensing transcription factor receptor in Pseudomonas aeruginosa is coordinated by distinct and overlapping dependencies on C4-homoserine lactone and PqsE.

PLoS Genetics, 2023
Quorum sensing is a mechanism of bacterial cell-cell communication that relies on the production and detection of small molecule autoinducers, which facilitate the synchronous expression of genes involved in group behaviors, such as virulence factor ...
Nicholas R Keegan, Nathalie J Colón Torres, Anne M Stringer, Lia I Prager, Matthew W Brockley, Charity L McManaman, Joseph T Wade, Jon E Paczkowski   +7 more
doaj   +1 more source