In Vitro Assay for Measuring Receptor-Kinase Activity in the Bacillus subtilis Chemotaxis Pathway

  • Hanna E. Walukiewicz
  • George W. Ordal
  • Christopher V. Rao
Part of the Methods in Molecular Biology book series (MIMB, volume 1729)


The sensing apparatus of the Bacillus subtilis chemotaxis pathway involves a complex consisting of chemoreceptors, the CheA histidine kinase, and the CheV and CheW adaptor proteins. Attractants and repellents alter the rate of CheA autophosphorylation, either by directly binding the receptors or by indirectly interacting with them through intermediate binding proteins. We describe an in vitro assay for measuring receptor-kinase activity in B. subtilis. This assay has been used to investigate the mechanism of signal transduction in B. subtilis chemotaxis and the disparate mechanisms employed by this bacterium for sensory adaptation and gradient sensing.


Chemotaxis Bacillus subtilis Chemoreceptors CheA Kinase assay 



This work was supported by National Institutes of Health Grant GM054365.


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Copyright information

© Springer Science+Business Media, LLC 2018

Authors and Affiliations

  • Hanna E. Walukiewicz
    • 1
  • George W. Ordal
    • 2
  • Christopher V. Rao
    • 1
  1. 1.Department of Chemical and Biomolecular EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaUSA
  2. 2.Department of Medical BiochemistryUniversity of IllinoisUrbanaUSA

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