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Showing 1 to 8 of 8 for “"EsaR"”.
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Genetic Analysis of the Quorum Sensing Regulator EsaR
… The 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 …
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Structure-Function Analysis of the EsaR N-terminal Domain
… signal ligand, an acyl-homoserine lactone (AHL). EsaR, from the corn pathogen Pantoea stewartii, represents a subset of LuxR homologues that are active in the absence of AHL and deactivated by its presence. The mechanism by which EsaR responds to AHL in a manner opposite to that of the majority of …
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Development of Methods for Structural Characterization of Pantoea stewartii Quorum-Sensing Regulator EsaR
… there is a subset of LuxR homologues, the EsaR subfamily, which is active without the AHL ligand and becomes inactivated once bound to it. EsaR is the best understood member of this subfamily. It controls virulence in the corn pathogen Pantoea stewartii ssp. stewartii. Solubility issues …
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Structure/Function Analysis of the Quorum-sensing Regulator EsaR from the Plant Pathogen Pantoea stewartii
… sensing, the LuxI and LuxR homologues EsaI and EsaR. Most LuxR homologues function as activators of transcription in the presence of their cognate acylated homoserine lactone signal (AHL). EsaR utilizes an AHL-response opposite of the majority of the LuxR homologues. EsaR represses EPS …
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Investigation of the quorum-sensing regulon in the corn pathogen Pantoea stewartii
… by the QS-dependent transcriptional regulator EsaR. EsaR represses expression of capsular exopolysaccharide at low cell densities. At high cell densities, an acylated homoserine lactone (AHL) molecule produced during growth by the cognate AHL-synthase EsaI accumulates. The AHL binds to and …
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Analysis of the Quorum Sensing Regulons of Vibrio parahaemolyticus BB22 and Pantoea stewartii subspecies stewartii
… LuxRVh and the P. stewartii system contains EsaR which is homologous to the V. fischeri LuxRVf regulator. While the two systems differ in the molecular details of their mechanistic control, they are both forms of cell density dependent regulation that are either directly or indirectly …
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Investigation of Pantoea stewartii Quorum-Sensing Controlled Regulators and Genes Important for Infection of Corn
… in this dissertation, the QS master regulator EsaR was shown to regulate two major virulence factors of P. stewartii, capsule production and surface motility. However, the function and integration of EsaR downstream targets in P. stewartii were still largely undefined. Moreover, only a draft …
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Transcriptional Control during Quorum Sensing by LuxR and LuxR Homologues
… initiation was also examined. LuxR homologues EsaR of Pantoea stewarti ssp. stewartii, a repressor of known function, and ExpR of Erwinia carotovora subsp. carotovora were also analyzed for their ability to activate the lux operon, as well as to repress transcription from an artificial promoter …