Quorum sensing (Microbiology)
Quorum Sensing and the Lifestyle of Yersinia
... Apart from the AHL synthase, the second regulatory component of an AHL-dependent quorum sensing circuit is usually a member of the LuxR family of transcriptional regulators (Swift et al., 2001; Cámara et ...
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Pseudomonas aeruginosa Quorum Sensing Molecule Alters Skeletal Muscle Protein Homeostasis by Perturbing the Antioxidant Defense System
... a quorum sensing (QS)-regulated low-molecular- weight bacterial molecule (18), produced and excreted by Pseudomonas aeruginosa, a highly problematic pathogen that defies efforts at antibiotic-based ...
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Quorum sensing in Staphylococcus infections
... of quorum sensing in staphylococcal infections may not always be immediately obvious, as it varies with infection type, host environment, and even ...agr quorum-sensing system, already known ...
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Modulation of Quorum Sensing as an Adaptation to Nodule Cell Infection during Experimental Evolution of Legume Symbionts
... In rhizobium-legume symbiosis, the accommodation of bacteria within nodule cells is a crucial step, since it protects internalized bacteria from plant defense reactions, while massive bacterial multiplication allows for ...
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Quorum Sensing Mediated, Cell Density Dependent Regulation of Growth and Virulence in Cryptococcus neoformans
... ABSTRACT Quorum sensing (QS) is a cell density-dependent mechanism of communication between microorganisms, character- ized by the release of signaling molecules that affect microbial metabolism and gene ...
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Structural and Mechanistic Roles of Novel Chemical Ligands on the SdiA Quorum Sensing Transcription Regulator
... termed quorum sensing (QS), to mediate intercellular communication, mim- icking multicellular ...by sensing endogenous acyl homoserine lactones ...
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Signal Integration in Quorum Sensing Enables Cross Species Induction of Virulence in Pectobacterium wasabiae
... In Pectobacterium wasabiae, the AHL system includes ExpI, a LuxI-type AHL synthase, and two AHL receptors, ExpR1 and ExpR2, which are LuxR homologues. These two receptors control the transcription of rsmA, a global ...
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A rhlI 5′ UTR Derived sRNA Regulates RhlR Dependent Quorum Sensing in Pseudomonas aeruginosa
... ABSTRACT N-Acyl homoserine lactone (AHL) quorum sensing (QS) controls expres- sion of over 200 genes in Pseudomonas aeruginosa. There are two AHL regulatory systems: the LasR-LasI circuit and the RhlR-RhlI ...
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Escherichia coli Quorum Sensing EDF, A Peptide Generated by Novel Multiple Distinct Mechanisms and Regulated by trans Translation
... IMPORTANCE Bacteria communicate with one another via quorum-sensing (QS) signal molecules. QS provides a mechanism for bacteria to monitor each other’s presence and to modulate gene expression in response ...
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Quorum sensing interference and structural variation of quorum sensing mimics in Australian soft coral
... Quorum Sensing (QS) is one form of cell to cell signaling employed by bacteria to coordinate gene expression across entire populations through release and detection of extracellular signal molecules (Miller ...
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Reversible Signal Binding by the Pseudomonas aeruginosa Quorum Sensing Signal Receptor LasR
... acyl-HSL quorum sensing was first discovered, is rapidly transferred from a signal-replete medium to a signal-depleted me- dium but kept at the same population density, transcription of ...
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Quorum Sensing Determines the Choice of Antiphage Defense Strategy in Vibrio anguillarum
... to quorum-sensing-mediated downregulation of OmpK ...two quorum-sensing mutant strains are accurately reflected in the behavior of wild-type ...lactone quorum-sensing signals in ...
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The Fungal Quorum Sensing Molecule Farnesol Activates Innate Immune Cells but Suppresses Cellular Adaptive Immunity
... categories of both monocyte-to-DC differentiation and matura- tion of DC after LPS stimulation. DC generated in the presence of FOH displayed impaired migration and cell spreading and a delay in forming protrusions. ...
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LasR Variant Cystic Fibrosis Isolates Reveal an Adaptable Quorum Sensing Hierarchy in Pseudomonas aeruginosa
... ABSTRACT Chronic Pseudomonas aeruginosa infections cause significant morbidity in patients with cystic fibrosis (CF). Over years to decades, P. aeruginosa adapts genetically as it establishes chronic lung infections. ...
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Quorum Sensing and Metabolic State of the Host Control Lysogeny Lysis Switch of Bacteriophage T1
... IMPORTANCE The dynamics of microbial communities are heavily shaped by bacterium-bacteriophage interactions. But despite the apparent importance of bacte- riophages, our understanding of the mechanisms controlling phage ...
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Novel Quorum Sensing Peptides Mediating Interspecies Bacterial Cell Death
... EDFs as a family of quorum-sensing peptides that enhance the in vitro endoribonucleolytic activity of E. coli MazF. Previ- ously, we reported that, in vitro, EcEDF interacts directly with E. coli MazF, ...
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Antagonistic Rgg Regulators Mediate Quorum Sensing via Competitive DNA Binding in Streptococcus pyogenes
... key components of quorum sensing (QS) pathways that utilize peptides as intercellular signaling molecules. We previously de- scribed a novel QS system in Streptococcus pyogenes which utilizes two Rgg-family ...
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Positive Autoregulation of an Acyl Homoserine Lactone Quorum Sensing Circuit Synchronizes the Population Response
... Positive autoregulation of autoinducer synthesis is a characteristic of AHL QS systems governed by LuxR family transcriptional activators, and it is common to many peptide signaling autoinduction systems in Gram-positive ...
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The Complex Quorum Sensing Circuitry of Burkholderia thailandensis Is Both Hierarchically and Homeostatically Organized
... IMPORTANCE Quorum sensing (QS) is a widespread bacterial communication sys- tem coordinating the expression of specific genes in a cell density-dependent man- ner and allowing bacteria to synchronize their ...
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A REVIEW ON QUORUM SENSING INHIBITORS
... within quorum sensing (QS) mediated biofilms. Quorum sensing can develop microbial pathogenic traits, including biofilm ...inhibit quorum sensing, which may be done by various ...
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