Artikel ; Online: The YmgB-SpoT interaction triggers the stringent response in Escherichia coli.
The Journal of biological chemistry
2023 Band 299, Heft 12, Seite(n) 105429
Abstract: Virtually all bacterial species synthesize (p)ppGpp (guanosine penta- or tetraphosphate), a pleiotropic regulator of the so-called stringent response, which controls many aspects of cellular physiology and metabolism. In Escherichia coli, (p)ppGpp levels ...
Abstract | Virtually all bacterial species synthesize (p)ppGpp (guanosine penta- or tetraphosphate), a pleiotropic regulator of the so-called stringent response, which controls many aspects of cellular physiology and metabolism. In Escherichia coli, (p)ppGpp levels are controlled by two homologous enzymes: the (p)ppGpp synthetase RelA and the bifunctional synthetase/hydrolase SpoT. We recently identified several protein candidates that can modulate (p)ppGpp levels in E. coli. In this work, we show that the putative two-component system connector protein YmgB can promote SpoT-dependent accumulation of ppGpp in E. coli. Importantly, we determined that the control of SpoT activities by YmgB is independent of its proposed role in the two-component Rcs system, and these two functions can be uncoupled. Using genetic and structure-function analysis, we show that the regulation of SpoT activities by YmgB occurs by functional and direct binding in vivo and in vitro to the TGS and Helical domains of SpoT. These results further support the role of these domains in controlling the reciprocal enzymatic states. |
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Mesh-Begriff(e) | Escherichia coli/metabolism ; Guanosine Pentaphosphate/genetics ; Bacteria/metabolism ; Guanosine Tetraphosphate ; Hydrolases/metabolism ; Ligases/genetics ; Ligases/metabolism ; Gene Expression Regulation, Bacterial ; Escherichia coli Proteins/genetics ; Escherichia coli Proteins/metabolism |
Chemische Substanzen | Guanosine Pentaphosphate (38918-96-6) ; Guanosine Tetraphosphate (33503-72-9) ; Hydrolases (EC 3.-) ; Ligases (EC 6.-) ; YmgB protein, E coli ; Escherichia coli Proteins |
Sprache | Englisch |
Erscheinungsdatum | 2023-11-04 |
Erscheinungsland | United States |
Dokumenttyp | Journal Article |
ZDB-ID | 2997-x |
ISSN | 1083-351X ; 0021-9258 |
ISSN (online) | 1083-351X |
ISSN | 0021-9258 |
DOI | 10.1016/j.jbc.2023.105429 |
Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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