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Updated: May 26, 2026
09:17
Quantification of Bacterial Histidine Kinase Autophosphorylation Using a Nitrocellulose Binding Assay
Published on: January 11, 2017
Histidine kinases and response regulators in networks
Kirsten Jung1, Luitpold Fried, Stefan Behr
1Munich Center for integrated Protein Science at the Ludwig-Maximilians-Universität München, Department of Biology I, Microbiology, Großhaderner Str. 2-4, 82152 Martinsried, Germany. jung@lmu.de
Current Opinion in Microbiology
|December 17, 2011
Summary
Bacteria use two-component systems, involving histidine kinases (HKs) and response regulators (RRs), for signal transduction. This review explores how accessory proteins expand their roles beyond linear signaling within complex regulatory networks.
Area of Science:
- Microbiology
- Molecular Biology
- Biochemistry
Background:
- Two-component systems (TCS), comprising histidine kinases (HKs) and response regulators (RRs), are primary signal transduction mechanisms in bacteria.
- Historically, TCS were viewed as simple, linear phosphorylation-dependent pathways mediating stimulus-response coupling.
Purpose of the Study:
- To review the multifaceted roles of accessory proteins in modulating bacterial two-component system function.
- To elucidate how these proteins facilitate signal integration, scaffolding, interconnection, and allosteric regulation.
- To examine the integration of TCS within broader bacterial regulatory networks.
Main Methods:
- Literature review and synthesis of existing research on bacterial two-component systems.
- Analysis of studies detailing the function of accessory proteins interacting with HKs and RRs.
- Examination of regulatory network architectures involving TCS.
Main Results:
- Accessory proteins significantly expand the regulatory capacity of HKs and RRs.
- These proteins enable complex signal integration, scaffolding, and allosteric control of TCS activity.
- TCS are embedded within intricate regulatory networks, demonstrating non-linear signaling principles.
Conclusions:
- Bacterial signal transduction via two-component systems is more complex than previously understood.
- Accessory proteins are critical for the sophisticated regulation and network integration of HK-RR pairs.
- Understanding these interactions is key to deciphering bacterial adaptive responses.
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