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• W1577836495 abstract "Summary NprR is a quorum sensor of the RNPP family found in bacteria of the B acillus cereus group. In association with its cognate peptide NprX , NprR controls the expression of genes essential for survival and sporulation of B acillus thuringiensis during its necrotrophic development in insects. Here, we report that the nprR – nprX genes are not autoregulated and are co‐transcribed from a σ A ‐dependent promoter ( P A ) located upstream from nprR . The transcription from P A starts at the onset of the stationary phase and is controlled by two transcriptional regulators: CodY and PlcR . The nutritional repressor CodY represses nprR – nprX transcription during the exponential growth phase and the quorum sensor PlcR activates nprR – nprX transcription at the onset of stationary phase. We show that nprX is also transcribed independently of nprR from two promoters, P H and P E , dependent on the sporulation‐specific sigma factors, σ H and σ E respectively. Both promoters ensure nprX transcription during late stationary phase while transcription from P A has decreased. These results show that the activity of the NprR – NprX quorum sensing system is tightly co‐ordinated to the physiological stage throughout the developmental process of the B acillus ." @default.
• W1577836495 created "2016-06-24" @default.
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• W1577836495 date "2013-03-06" @default.
• W1577836495 modified "2023-10-17" @default.
• W1577836495 title "Activity of the<i>Bacillus thuringiensis</i> NprR-NprX cell-cell communication system is co-ordinated to the physiological stage through a complex transcriptional regulation" @default.
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• W1577836495 doi "https://doi.org/10.1111/mmi.12168" @default.
• W1577836495 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23388036" @default.
• W1577836495 hasPublicationYear "2013" @default.
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