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- W1177264429 endingPage "745" @default.
- W1177264429 startingPage "727" @default.
- W1177264429 abstract "Originally characterized for nitrogen regulation (NtrB-NtrC), chemotaxis (CheA-CheY-CheB), osmoregulation (EnvZ-OmpR), and regulation of phosphate uptake (PhoR-PhoB) in Escherichia coli and Salmonella typhimurium, the family of two-component systems has rapidly expanded, and new examples continue to emerge. More than 30 of these regulatory pairs have been identified in both gram-negative and gram-positive bacteria; they control functions ranging from virulence gene expression in Agrobacterium tumefaciens (VirA-VirG), S. typhimurium (PhoQ-PhoP), and Bordetella pertussis (BvgSBvgA) to complex developmental pathways such as sporulation (SpoIIJ-SpoOF-SpoOA) and competence for transformation by exogenous DNA (ComP-ComA and DegS-DegU) in Bacillus subtilis. These pairs are the focus of this chapter. Sequence similarities to other two-component systems suggest the conserved His-189 residue of the DegS protein kinase and Asp-56 residue of the DegU response regulator as likely candidates for the respective phosphorylation sites of the two proteins. A large number of proteins belonging to the histidine protein kinase-response regulator family have been characterized in gram-positive bacteria. It appears that a considerable amount of overlap exists between the different systems controlling postexponential-phase responses in B. subtilis. Thus, DegS-DegU, ComP-ComA, and SpoOA are all involved in controlling competence gene expression, and the SpoOA phosphorelay and DegS-DegU both control protease gene expression." @default.
- W1177264429 created "2016-06-24" @default.
- W1177264429 creator A5010588182 @default.
- W1177264429 creator A5064504349 @default.
- W1177264429 creator A5068323181 @default.
- W1177264429 date "2014-04-30" @default.
- W1177264429 modified "2023-10-09" @default.
- W1177264429 title "Two-Component Regulatory Systems" @default.
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