The Hsp90 inhibitor radicicol interacts with the ATP-binding pocket of bacterial sensor kinase PhoQ.
Guarnieri, M.T., Zhang, L., Shen, J., Zhao, R.(2008) J Mol Biol 379: 82-93
- PubMed: 18440021 
- DOI: 10.1016/j.jmb.2008.03.036
- Primary Citation of Related Structures:  
3CGY, 3CGZ - PubMed Abstract: 
Sensor kinases in the bacterial two-component system share a unique ATP-binding Bergerat fold with the GHL (gyrase, Hsp90, and MutL) family of proteins. We demonstrated that selected GHL inhibitors bind to the catalytic domain of sensor kinase PhoQ (PhoQcat) using NMR chemical shift perturbation experiments ...