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- W2113869130 abstract "Summary The extracytoplasmic function sigma factor σ T is the master regulator of general stress response in Caulobacter crescentus and controls the expression of its paralogue σ U . In this work we showed that PhyR and NepR act, respectively, as positive and negative regulators of σ T expression and function. Biochemical data also demonstrated that NepR directly binds σ T and the phosphorylated form of PhyR. We also described the essential role of the histidine kinase gene CC3474, here denominated phyK , for expression of σ T ‐dependent genes and for resistance to stress conditions. Additionally, in vivo evidence of PhyK‐dependent phosphorylation of PhyR is presented. This study also identified a conserved cysteine residue (C95) located in the periplasmic portion of PhyK that is crucial for the function of the protein. Furthermore, we showed that PhyK, PhyR and σ T regulate the same set of genes and that σ T apparently directly controls most of its regulon. In contrast, σ U seems to have a very modest contribution to the expression of a subset of σ T ‐dependent genes. In conclusion, this report describes the molecular mechanism involved in the control of general stress response in C. crescentus ." @default.
- W2113869130 created "2016-06-24" @default.
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- W2113869130 date "2011-05-12" @default.
- W2113869130 modified "2023-10-15" @default.
- W2113869130 title "A two-component system, an anti-sigma factor and two paralogous ECF sigma factors are involved in the control of general stress response in Caulobacter crescentus" @default.
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- W2113869130 doi "https://doi.org/10.1111/j.1365-2958.2011.07668.x" @default.
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