1TXE

Solution structure of the active-centre mutant Ile14Ala of the histidine-containing phosphocarrier protein (HPr) from Staphylococcus carnosus


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.2 of the entry. See complete history


Literature

Solution structure of the active-centre mutant I14A of the histidine-containing phosphocarrier protein from Staphylococcus carnosus

Moeglich, A.Koch, B.Gronwald, W.Hengstenberg, W.Brunner, E.Kalbitzer, H.R.

(2004) Eur J Biochem 271: 4815-4824

  • DOI: 10.1111/j.1432-1033.2004.04447.x
  • Primary Citation of Related Structures:  
    1TXE

  • PubMed Abstract: 
  • High-pressure NMR experiments performed on the histidine-containing phosphocarrier protein (HPr) from Staphylococcus carnosus have shown that residue Ile14, which is located in the active-centre loop, exhibits a peculiarly small pressure response. In contrast, the rest of the loop shows strong pressure effects as is expected for typical protein interaction sites ...

    High-pressure NMR experiments performed on the histidine-containing phosphocarrier protein (HPr) from Staphylococcus carnosus have shown that residue Ile14, which is located in the active-centre loop, exhibits a peculiarly small pressure response. In contrast, the rest of the loop shows strong pressure effects as is expected for typical protein interaction sites. To elucidate the structural role of this residue, the mutant protein HPr(I14A), in which Ile14 is replaced by Ala, was produced and studied by solution NMR spectroscopy. On the basis of 1406 structural restraints including 20 directly detected hydrogen bonds, 49 1H(N)-15N, and 25 1H(N)-1Halpha residual dipolar couplings, a well resolved three-dimensional structure could be determined. The overall fold of the protein is not influenced by the mutation but characteristic conformational changes are introduced into the active-centre loop. They lead to a displacement of the ring system of His15 and a distortion of the N-terminus of the first helix, which supports the histidine ring. In addition, the C-terminal helix is bent because the side chain of Leu86 located at the end of this helix partly fills the hydrophobic cavity created by the mutation. Xenon, which is known to occupy hydrophobic cavities, causes a partial reversal of the mutation-induced structural effects. The observed structural changes explain the reduced phosphocarrier activity of the mutant and agree well with the earlier suggestion that Ile14 represents an anchoring point stabilizing the active-centre loop in its correct conformation.


    Related Citations: 
    • 15N and 1H NMR study of histidine containing protein (HPr) from Staphylococcus carnosus at high pressure
      Kalbitzer, H.R., Goerler, A., Li, H., Dubovskii, P.V., Hengstenberg, W., Kowolik, C., Yamada, H., Akasaka, K.
      (2000) Protein Sci 9: 693
    • Solution Structure of the Histidine-Containing Phosphocarrier Protein from Staphylococcus carnosus
      Goerler, A., Hengstenberg, W., Kravanja, M., Beneicke, W., Maurer, T., Kalbitzer, H.R.
      (1999) Appl Magn Reson 17: 465
    • NMR-spectroscopic mapping of an engineered cavity in the I14A mutant of HPr from Staphylococcus carnosus using xenon
      Groeger, C., Moeglich, A., Pons, M., Koch, B., Hengstenberg, W., Kalbitzer, H.R., Brunner, E.
      (2003) J Am Chem Soc 125: 8726
    • DRESS: a database of REfined solution NMR structures
      Nabuurs, S.B., Nederveen, A.J., Vranken, W., Doreleijers, J.F., Bonvin, A.M.J.J., Vuister, G.W., Vriend, G., Spronk, C.A.E.M.
      (2004) Proteins 55: 483
    • Refinement of protein structures in explicit solvent
      Linge, J.P., Williams, M.A., Spronk, C.A.E.M., Bonvin, A.M.J.J., Nilges, M.
      (2003) Proteins 50: 496

    Organizational Affiliation

    Institute of Biophysics and Physical Biochemistry, University of Regensburg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phosphocarrier protein HPrA88Staphylococcus carnosusMutation(s): 1 
Gene Names: ptsH
UniProt
Find proteins for P23534 (Staphylococcus carnosus)
Explore P23534 
Go to UniProtKB:  P23534
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1TXE Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-03-08
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance