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Showing 1 to 20 of 242 for “"quorum"”.
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Mathematical Models of Quorum Sensing
… We present mathematical models dealing with quorum sensing, which is the biological process of communication in bacteria. The density-dependent means of communication are mediated by molecules called autoinducers that are both synthesized and collected by quorum sensing bacteria. We employ …
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Effect of Spatial Organization and Population Ratios on the Dynamics of Quorum Sensing and Quorum Quenching in Bacteria Communities
Quorum sensing (QS) is a type of microbial communication used by bacteria to coordinate their behavior based on population density, regulating complex processes like biofilm formation and virulence, among other behaviors. Quorum quenching (QQ), on the other hand, disrupts this communication, …
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Investigation of quorum sensing process in Bacillus licheniformis
Quorum sensing is a well-established system of communication adopted by a number of bacterial, and some fungal, populations. This cell density dependent phenomenon is based on the accumulation of small diffusible molecules, termed as quorum sensing molecules, in the extracellular milieu until a …
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Synthesis and evaluation of novel quorum sensing inhibitors
… furanones and the subsequent evaluation of their quorum sensing inhibitory effects. Chapter One focuses on the role of quorum sensing in bacteria and fungi. It explores the potential use of quorum sensing inhibitors as an alternative to, or in combination with antibiotics during the treatment of …
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Quorum consensus protocols for the client server architecture
… a new highly efficient, highly reliable quorum consensus protocol, the Quorum Rings (QR) protocol, specifically designed to take advantage of the client-server architecture. We will also introduce an algorithm that modifies existing quorum consensus protocols to work efficiently and …
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Genetic Analysis of the Quorum Sensing Regulator EsaR
… production of EPS is regulated by an EsaI/EsaR quorum sensing mechanism, homologous to the LuxI/R system. Although activation of the EPS encoding genes by EsaR occurs after it complexes to the AHL (3-oxo-C6-HSL), unlike the LuxI/R system, this activation occurs by a different mechanism. At low …
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Identification of Quorum Sensing Genes in Hypersaline Microbial Mats
… conditions. One such pathway is called quorum sensing (QS), a cell-density dependent phenomenon involving the production, release, and detection of small diffusible signaling molecules referred to as autoinducers. This pathway ultimately coordinates gene expression among the bacterial …
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The Emergence of Knowledge And The Benefits Of Quorum
… of data generally requires sampling of a quorum of free energy minima, thus requiring that the machine operate at finite temperatures. Motion along the landscape requires activation; still, the activation barriers are substantially lowered when the auxiliary degrees of freedom are …
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Dynamic Regulation of Metabolic Flux Using Orthogonal Quorum Sensing
… chemicals. One dynamic regulation strategy is quorum sensing (QS), a cell-to-cell communication that allows populations of cells to function as a collective. By applying QS to engineered pathways, the diversion of metabolic resources can be coupled to the population of the culture, thereby …
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Engineering LuxR-type quorum sensing proteins for new functions
… communicate information in a process known as quorum sensing, actuating downstream gene expression based on cell-cell signalling. Cell-cell signalling allows for complex and multi-cellular behavior otherwise impossible with unicellular logic. However, building complex cell-cell signalling …
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HAEMOPHILUS INFLUENZAE AND MORAXELLA CATARRHALIS INTRA- AND INTERSPECIES QUORUM SIGNALING
… infection is bacterial communication via quorum signaling. Autoinducer-2 (AI-2) is termed an interspecies signal as the genetic determinant for AI-2 production (<italic>luxS</italic>) is highly conserved and many species possess the machinery to respond to AI-2. <italic>H. …
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Studying the Competence Regulon Quorum Sensing Circuity in Streptococcus mitis
Quorum sensing (QS) is a bacterial mechanism for modulating gene expression in response to cell-population density via intercellular communication. QS bacteria generate and release chemical signal molecules known as autoinducers, which increase in concentration as cell density increases. To …
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Quorum Sensing and Virulence Regulation in Commensal and Pathogenic Bacteria
Quorum sensing (QS) is a peptide-mediated bacterial communication process that regulates collective behaviors including genetic competence, biofilm formation, virulence, and horizontal gene transfer. In streptococci, QS commonly occurs through the ComABCDE and ComRS signaling pathways, which …
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The Effects of Quorum Sensing Molecules on Streptococcus mutans Biofilm
The use of quorum quenching (QQ) molecules to prevent biofilm formation has recently gained momentum. Interrupting the quorum sensing (QS) pathways of cariogenic bacteria like Streptococcus mutans could reduce the formation of dental plaque on teeth, lowering the incidences of caries and …
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Estudio de protocolos de comunicación bacterianos: conjugación y quorum sensing.
… las bacterias son la detección de quórum o quorum sensing y la conjugación. El quorum sensing es un mecanismo que permite a las bacterias difundir una señal sobre el medio en el que se encuentran, y así modificar su comportamiento en función de la concentración que existe de esta señal. La …
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Molecular and transcriptomic studies of quorum sensing in Chromobacterium subtsugae
… provide evidence for a novel function of the quorum sensing system. C. subtusgae can sense the presence of competitors by through non-cognate AHL molecules and express genes to design an attack against those competitors.
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