1KKL

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.213 

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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 U S A 99: 13437-13441

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

  • 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 its dephosphorylation by phosphorolysis ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HprK proteinA, B, C205Lacticaseibacillus caseiMutation(s): 0 
Gene Names: PTSKhprK
EC: 2.7.1 (PDB Primary Data), 3.1.3 (PDB Primary Data), 2.7.11 (UniProt), 2.7.4 (UniProt)
Find proteins for Q9RE09 (Lactobacillus casei)
Explore Q9RE09 
Go to UniProtKB:  Q9RE09
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PHOSPHOCARRIER PROTEIN HPRD [auth H], E [auth I], F [auth J]100Bacillus subtilisMutation(s): 1 
Gene Names: ptsH
Find proteins for P08877 (Bacillus subtilis (strain 168))
Explore P08877 
Go to UniProtKB:  P08877
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
G [auth A], H [auth B], I [auth C]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 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
b = 81.135β = 90
c = 253.192γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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