3CGZ

Crystal Structure of Salmonella Sensor Kinase PhoQ catalytic domain

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.234 

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Literature

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

  • 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 ...

    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. Using crystallographic approaches, we show that radicicol (an Hsp90 inhibitor) binds and interacts specifically with residues in the ATP-binding pocket of PhoQ. The interaction between radicicol and PhoQcat demonstrates significant similarities as well as differences compared to AMPPNP (a non-hydrolyzable ATP analog) bound to PhoQcat and radicicol bound to Hsp90. Our results suggest that GHL inhibitors may be useful lead compounds for developing sensor kinase inhibitors.

    Organizational Affiliation: 

    Department of Biochemistry and Molecular Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, CO 80045, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Virulence sensor histidine kinase phoQA, B, C157Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: phoQ
EC: 2.7.13.3 (PDB Primary Data), 3.1.3 (UniProt)
UniProt
Find proteins for P0DM80 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0DM80 
Go to UniProtKB:  P0DM80
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.234 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.121α = 90
b = 64.287β = 119.58
c = 85.945γ = 90
Software Package:
Software NamePurpose
d*TREKdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
d*TREKdata reduction
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-05-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance