1KNX

HPr kinase/phosphatase from Mycoplasma pneumoniae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of HPr Kinase/Phosphatase from Mycoplasma pneumoniae

Allen, G.S.Steinhauer, K.Hillen, W.Stulke, J.Brennan, R.G.

(2003) J.Mol.Biol. 326: 1203-1217


  • PubMed Abstract: 
  • HPr kinase/phosphatase (HPrK/P) modifies serine 46 of histidine-containing protein (HPr), the phosphorylation state of which is the control point of carbon catabolite repression in low G+C Gram-positive bacteria. To understand the structural mechanis ...

    HPr kinase/phosphatase (HPrK/P) modifies serine 46 of histidine-containing protein (HPr), the phosphorylation state of which is the control point of carbon catabolite repression in low G+C Gram-positive bacteria. To understand the structural mechanism by which HPrK/P carries out its dual, competing activities we determined the structure of full length HPrK/P from Mycoplasma pneumoniae (PD8 ID, 1KNX) to 2.5A resolution. The enzyme forms a homo-hexamer with each subunit containing two domains connected by a short loop. The C-terminal domain contains the well-described P-loop (Walker A box) ATP binding motif and takes a fold similar to phosphoenolpyruvate carboxykinase (PEPCK) from Escherichia coli as recently described in other HPrK/P structures. As expected, the C-terminal domain is very similar to the C-terminal fragment of Lactobacillus casei HPrK/P and the C-terminal domain of Staphylococcus xylosus HPrK/P; the N-terminal domain is very similar to the N-terminal domain of S.xylosus HPrK/P. Unexpectedly, the N-terminal domain resembles UDP-N-acetylmuramoyl-L-alanyl-D-glutamate:meso-diaminopimelate ligase (MurE), yet the function of this domain is unclear. We discuss these observations as well as the structural significance of mutations in the P-loop and HPrK/P family sequence motif.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239-3098, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable HPr(Ser) kinase/phosphatase
A, B, C, D, E, F
312Mycoplasma pneumoniae (strain ATCC 29342 / M129)Gene Names: hprK (ptsK)
EC: 2.7.11.-, 2.7.4.-
Find proteins for P75548 (Mycoplasma pneumoniae (strain ATCC 29342 / M129))
Go to UniProtKB:  P75548
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.227 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 117.734α = 90.00
b = 127.845β = 90.00
c = 170.772γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
d*TREKdata scaling
d*TREKdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2001-12-19 
  • Released Date: 2002-12-31 
  • Deposition Author(s): Allen, G.S.

Revision History 

  • Version 1.0: 2002-12-31
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance