Quorum sensing: the many languages of bacteria

Reading, Nicola C.; Sperandio, Vanessa

doi:10.1111/j.1574-6968.2005.00001.x

Cited by 342 publications

(201 citation statements)

References 89 publications

Supporting

Mentioning

193

Contrasting

Unclassified

Order By: Relevance

“…Quorum sensing (QS), a generic regulatory mechanism used by many bacteria to perceive and respond to the density of the population, enables bacterial cells to communicate with each other and to coordinate their activities (Reading and Sperandio 2006). Although there are different opinions on the roles of DKPs play in QS systems (Campbell et al 2009), it has also been well documented that certain DKPs were found to be capable of activating or antagonizing LuxR-based QS systems (Degrassi et al 2002;Holden et al 1999;Tommonaro et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Inhibition of biofilm in Bacillus amyloliquefaciens Q-426 by diketopiperazines

Wang

Yang

Fang

et al. 2016

World J Microbiol Biotechnol

View full text Add to dashboard Cite

Biofilm formation can make significant effects on bacteria habits and biological functions. In this study, diketopiperazines (DKPs) produced by strain of Bacillus amyloliquefaciens Q-426 was found to inhibit biofilm formed in the gas-liquid interface. Four kinds of DKPs were extracted from B. amyloliquefaciens Q-426, and we found that 0.04 mg ml -1 DKPs could obviously inhibit the biofilm formation of the strain. DKPs produced by B. amyloliquefaciens Q-426 made a reduction on extracellular polymeric substance (EPS) components, polysaccharides, proteins, DNAs, etc. Real-time PCR was performed to determine that whether DKPs could make an obvious effect on the expression level for genes related to biofilm formation in the strain. The relative expression level of genes tasA, epsH, epsG and remB which related to proteins, extracellular matrix, and polysaccharides, were downregulated with 0.04 mg ml -1 DKPs, while the expression level of nuclease gene nuc was significantly upregulated. The quantitative results of the mRNA expression level for these genes concerted with the quantitative results on EPS levels. All of the experimental results ultimately indicated that DKPs could inhibit the biofilm formation of the strain B. amyloliquefaciens Q-426.

show abstract

Section: Introductionmentioning

confidence: 99%

Inhibition of biofilm in Bacillus amyloliquefaciens Q-426 by diketopiperazines

Wang

Yang

Fang

et al. 2016

World J Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…Some of the most prominent examples of this are found in social insects, for example the choice of nest sites [2] and food sources [3,4] by ant colonies and the aggregation behavior of bees [5]. Countless other examples of self-organized collective decision making exist in both biological and human social systems, such as in quorum sensing in bacteria colonies [6] and in trend setting and following in economic markets [7]. Despite this variability the fundamental principles that govern self-organized collective behavior appear to be universal across the range [8].…”

Section: Introductionmentioning

confidence: 99%

A Model of Symmetry Breaking in Collective Decision-Making

Hamann

Meyer

Schmickl

2010

From Animals to Animats 11

View full text Add to dashboard Cite

Abstract. Symmetry breaking is commonly found in self-organized collective decision making. It serves an important functional role, specifically in biological and bio-inspired systems. The analysis of symmetry breaking is thus an important key to understanding self-organized decision making. However, in many systems of practical importance available analytic methods cannot be applied due to the complexity of the scenario and consequentially the model. This applies specifically to selforganization in bio-inspired engineering. We propose a new modeling approach which allows us to formally analyze important properties of such processes. The core idea of our approach is to infer a compact model based on stochastic processes for a one-dimensional symmetry parameter. This enables us to analyze the fundamental properties of even complex collective decision making processes via Fokker-Planck theory. We are able to quantitatively address the effectiveness of symmetry breaking, the stability, the time taken to reach a consensus, and other parameters. This is demonstrated with two examples from swarm robotics.

show abstract

“…When a critical threshold concentration of the signal molecule is achieved, bacteria detect its presence and initiate a signaling cascade resulting in changes of target gene expression [21,22,25]. Quorum sensing allows populations of bacteria to collectively control gene expression, and thus synchronize group behavior on the basis of local cell density.…”

Section: Quorum Sensingmentioning

confidence: 99%

Phylogenetic Analysis of Nitrogen-Fixing and Quorum Sensing Bacteria

Chaphalkar¹,

Salunkhe²

2010

Int J of Bioi Res

View full text Add to dashboard Cite

Abstract-The present study involves phylogenetic analysis of distinguished bacterial population essentially grouped into functional attributes, namely nitrogen fixation and quorum sensing. The basis of this analysis are protein sequences of NifH (nitrogenase reductase), LuxA (Luciferase alpha subunit) and LuxS (Sribosyl homocysteine lyase) from 30, 17, 25 species of bacteria respectively. These bacteria show vast diversity in terms of habitat mode of survival pathogenicity. Phylogenetic analysis gives an insight into the evolution and interrelationships of these microbial species. GeneBee, ClustalW and Phylip softwares were found to be satisfactory for the chosen work. Phylogenetic trees were constructed in the form of Cladograms, Phylograms and Unrooted radial trees. According to the results obtained, the most highly evolved group of organisms with respect to their nitrogenase reductase protein is that of Desulfovibrio vulgaris and Chlorobium phaeobacteriodes. Bacillus thuringiensis and Bacillus subtilis hold the most highly evolved forms of LuxS protein. Also knowledge abtained from the motif pattern analysis between Bradyrhizobium japonicum and Rhizobium leguminosarum NifH protein sequence are conserved and further analysis may show that there may be quorum sensing mediated gene regulation in host bacterium interaction. Phylogenetic analyses, thus, on the basis of highly conserved protein domains, universal in their existence, can provide a preamble to the actual 16S-rRNA based phylogeny or genomic analyses of phylogeny carried out in the wet lab.

show abstract

Quorum sensing: the many languages of bacteria

Cited by 342 publications

References 89 publications

Inhibition of biofilm in Bacillus amyloliquefaciens Q-426 by diketopiperazines

Inhibition of biofilm in Bacillus amyloliquefaciens Q-426 by diketopiperazines

A Model of Symmetry Breaking in Collective Decision-Making

Phylogenetic Analysis of Nitrogen-Fixing and Quorum Sensing Bacteria

Contact Info

Product

Resources

About