1KKL

L.casei HprK/P in complex with B.subtilis HPr


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray structure of a bifunctional protein kinase in complex with its protein substrate HPr.

Fieulaine, S.Morera, S.Poncet, S.Mijakovic, I.Galinier, A.Janin, J.Deutscher, J.Nessler, S.

(2002) Proc.Natl.Acad.Sci.USA 99: 13437-13441

  • DOI: 10.1073/pnas.192368699
  • Primary Citation of Related Structures:  1KKM

  • PubMed Abstract: 
  • HPr kinase/phosphorylase (HprK/P) controls the phosphorylation state of the phosphocarrier protein HPr and regulates the utilization of carbon sources by Gram-positive bacteria. It catalyzes both the ATP-dependent phosphorylation of Ser-46 of HPr and ...

    HPr kinase/phosphorylase (HprK/P) controls the phosphorylation state of the phosphocarrier protein HPr and regulates the utilization of carbon sources by Gram-positive bacteria. It catalyzes both the ATP-dependent phosphorylation of Ser-46 of HPr and its dephosphorylation by phosphorolysis. The latter reaction uses inorganic phosphate as substrate and produces pyrophosphate. We present here two crystal structures of a complex of the catalytic domain of Lactobacillus casei HprK/P with Bacillus subtilis HPr, both at 2.8-A resolution. One of the structures was obtained in the presence of excess pyrophosphate, reversing the phosphorolysis reaction and contains serine-phosphorylated HPr. The complex has six HPr molecules bound to the hexameric kinase. Two adjacent enzyme subunits are in contact with each HPr molecule, one through its active site and the other through its C-terminal helix. In the complex with serine-phosphorylated HPr, a phosphate ion is in a position to perform a nucleophilic attack on the phosphoserine. Although the mechanism of the phosphorylation reaction resembles that of eukaryotic protein kinases, the dephosphorylation by inorganic phosphate is unique to the HprK/P family of kinases. This study provides the structure of a protein kinase in complex with its protein substrate, giving insights into the chemistry of the phospho-transfer reactions in both directions.


    Organizational Affiliation

    Laboratoire d'Enzymologie et Biochimie Structurales, Unité Propre de Recherche (UPR) 9063, Centre National de la Recherche Scientifique (CNRS), 91198 Gif-sur-Yvette, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HprK protein
A, B, C
205Lactobacillus caseiGene Names: hprK
EC: 2.7.11.-, 2.7.4.-
Find proteins for Q9RE09 (Lactobacillus casei)
Go to UniProtKB:  Q9RE09
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PHOSPHOCARRIER PROTEIN HPR
H, I, J
100Bacillus subtilis (strain 168)Gene Names: ptsH
EC: 2.7.11.-
Find proteins for P08877 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P08877
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.213 
  • Space Group: P 32 1 2
Unit Cell:
Length (Å)Angle (°)
a = 81.135α = 90.00
b = 81.135β = 90.00
c = 253.192γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-08-28
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance