1KA5

Refined Solution Structure of Histidine Containing Phosphocarrier Protein from Staphyloccocus aureus


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 440 
  • Conformers Submitted: 16 
  • Selection Criteria: target function 

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This is version 1.2 of the entry. See complete history

Literature

High-resolution structure of the histidine-containing phosphocarrier protein (HPr) from Staphylococcus aureus and characterization of its interaction with the bifunctional HPr kinase/phosphorylase

Maurer, T.Meier, S.Kachel, N.Munte, C.E.Hasenbein, S.Koch, B.Hengstenberg, W.Kalbitzer, H.R.

(2004) J.Bacteriol. 186: 5906-5918

  • DOI: 10.1128/JB.186.17.5906-5918.2004

  • PubMed Abstract: 
  • A high-resolution structure of the histidine-containing phosphocarrier protein (HPr) from Staphylococcus aureus was obtained by heteronuclear multidimensional nuclear magnetic resonance (NMR) spectroscopy on the basis of 1,766 structural restraints. ...

    A high-resolution structure of the histidine-containing phosphocarrier protein (HPr) from Staphylococcus aureus was obtained by heteronuclear multidimensional nuclear magnetic resonance (NMR) spectroscopy on the basis of 1,766 structural restraints. Twenty-three hydrogen bonds in HPr could be directly detected by polarization transfer from the amide nitrogen to the carbonyl carbon involved in the hydrogen bond. Differential line broadening was used to characterize the interaction of HPr with the HPr kinase/phosphorylase (HPrK/P) of Staphylococcus xylosus, which is responsible for phosphorylation-dephosphorylation of the hydroxyl group of the regulatory serine residue at position 46. The dissociation constant Kd was determined to be 0.10 +/- 0.02 mM at 303 K from the NMR data, assuming independent binding. The data are consistent with a stoichiometry of 1 HPr molecule per HPrK/P monomer in solution. Using transversal relaxation optimized spectroscopy-heteronuclear single quantum correlation, we mapped the interaction site of the two proteins in the 330-kDa complex. As expected, it covers the region around Ser46 and the small helix b following this residue. In addition, HPrK/P also binds to the second phosphorylation site of HPr at position 15. This interaction may be essential for the recognition of the phosphorylation state of His15 and the phosphorylation-dependent regulation of the kinase/phosphorylase activity. In accordance with this observation, the recently published X-ray structure of the HPr/HPrK core protein complex from Lactobacillus casei shows interactions with the two phosphorylation sites. However, the NMR data also suggest differences for the full-length protein from S. xylosus: there are no indications for an interaction with the residues preceding the regulatory Ser46 residue (Thr41 to Lys45) in the protein of S. xylosus. In contrast, it seems to interact with the C-terminal helix of HPr in solution, an interaction which is not observed for the complex of HPr with the core of HPrK/P of L. casei in crystals.


    Related Citations: 
    • The Solution Structure of the Histidine Containing Phosphocarrier Protein (HPr) from Staphylococcus aureus as Determined by Two-Dimensional 1H-NMR Spectroscopy
      Kalbitzer, H.R.,Hengstenberg, W.
      (1993) Eur.J.Biochem. 216: 205


    Organizational Affiliation

    Institut für Biophysik und Physikalische Biochemie, Universität Regensburg, Regensburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHOCARRIER PROTEIN HPR
A
88Staphylococcus aureusMutation(s): 0 
Gene Names: ptsH
Find proteins for P0A0E3 (Staphylococcus aureus)
Go to UniProtKB:  P0A0E3
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 440 
  • Conformers Submitted: 16 
  • Selection Criteria: target function 
  • Olderado: 1KA5 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-03
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance