1ID0

CRYSTAL STRUCTURE OF THE NUCLEOTIDE BOND CONFORMATION OF PHOQ KINASE DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural and mutational analysis of the PhoQ histidine kinase catalytic domain. Insight into the reaction mechanism.

Marina, A.Mott, C.Auyzenberg, A.Hendrickson, W.A.Waldburger, C.D.

(2001) J.Biol.Chem. 276: 41182-41190

  • DOI: 10.1074/jbc.M106080200

  • PubMed Abstract: 
  • PhoQ is a transmembrane histidine kinase belonging to the family of two-component signal transducing systems common in prokaryotes and lower eukaryotes. In response to changes in environmental Mg(2+) concentration, PhoQ regulates the level of phospho ...

    PhoQ is a transmembrane histidine kinase belonging to the family of two-component signal transducing systems common in prokaryotes and lower eukaryotes. In response to changes in environmental Mg(2+) concentration, PhoQ regulates the level of phosphorylated PhoP, its cognate transcriptional response-regulator. The PhoQ cytoplasmic region comprises two independently folding domains: the histidine-containing phosphotransfer domain and the ATP-binding kinase domain. We have determined the structure of the kinase domain of Escherichia coli PhoQ complexed with the non-hydrolyzable ATP analog adenosine 5'-(beta,gamma-imino)triphosphate and Mg(2+). Nucleotide binding appears to be accompanied by conformational changes in the loop that surrounds the ATP analog (ATP-lid) and has implications for interactions with the substrate phosphotransfer domain. The high resolution (1.6 A) structure reveals a detailed view of the nucleotide-binding site, allowing us to identify potential catalytic residues. Mutagenic analyses of these residues provide new insights into the catalytic mechanism of histidine phosphorylation in the histidine kinase family. Comparison with the active site of the related GHL ATPase family reveals differences that are proposed to account for the distinct functions of these proteins.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOQ HISTIDINE KINASE
A
152Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: phoQ
EC: 2.7.13.3, 3.1.3.-
Find proteins for P23837 (Escherichia coli (strain K12))
Go to UniProtKB:  P23837
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download SDF File 
Download CCD File 
A
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.503α = 90.00
b = 45.004β = 90.00
c = 71.764γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
DMphasing
CNSrefinement
MADSYSphasing
SCALEPACKdata scaling
DENZOdata reduction
DMmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-10-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-01
    Type: Structure summary