1UU0

Histidinol-phosphate aminotransferase (HisC) from Thermotoga maritima (Apo-form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Studies of the Catalytic Reaction Pathway of a Hyperthermophilic Histidinol-Phosphate Aminotransferase

Fernandez, F.J.Vega, M.C.Lehmann, F.Sandmeier, E.Gehring, H.Christen, P.Wilmanns, M.

(2004) J Biol Chem 279: 21478

  • DOI: 10.1074/jbc.M400291200
  • Primary Citation of Related Structures:  
    1UU0, 1UU2, 1UU1, 1H1C

  • PubMed Abstract: 
  • In histidine biosynthesis, histidinol-phosphate aminotransferase catalyzes the transfer of the amino group from glutamate to imidazole acetol-phosphate producing 2-oxoglutarate and histidinol phosphate. In some organisms such as the hyperthermophile Thermotoga maritima, specific tyrosine and aromatic amino acid transaminases have not been identified to date, suggesting an additional role for histidinol-phosphate aminotransferase in other transamination reactions generating aromatic amino acids ...

    In histidine biosynthesis, histidinol-phosphate aminotransferase catalyzes the transfer of the amino group from glutamate to imidazole acetol-phosphate producing 2-oxoglutarate and histidinol phosphate. In some organisms such as the hyperthermophile Thermotoga maritima, specific tyrosine and aromatic amino acid transaminases have not been identified to date, suggesting an additional role for histidinol-phosphate aminotransferase in other transamination reactions generating aromatic amino acids. To gain insight into the specific function of this transaminase, we have determined its crystal structure in the absence of any ligand except phosphate, in the presence of covalently bound pyridoxal 5'-phosphate, of the coenzyme histidinol phosphate adduct, and of pyridoxamine 5'-phosphate. The enzyme accepts histidinol phosphate, tyrosine, tryptophan, and phenylalanine, but not histidine, as substrates. The structures provide a model of how these different substrates could be accommodated by histidinol-phosphate aminotransferase. Some of the structural features of the enzyme are more preserved between the T. maritima enzyme and a related threonine-phosphate decarboxylase from S. typhimurium than with histidinol-phosphate aminotransferases from different organisms.


    Related Citations: 
    • Crystal Structure of Histidinol Phosphate Aminotransferase (Hisc) from Escherichia Coli, and its Covalent Complex with Pyridoxal-5'-Phosphate and L-Histidinol Phosphate
      Sivaraman, J., Li, Y., Larocque, R., Schrag, J.D., Cygler, M., Matte, A.
      (2001) J Mol Biol 311: 761

    Organizational Affiliation

    EMBL c/o Deutsches Elektronen-Synchrotron, Notkestrasse 85, Building 25A, D-22603 Hamburg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HISTIDINOL-PHOSPHATE AMINOTRANSFERASEA, B, C, D335Thermotoga maritimaMutation(s): 0 
EC: 2.6.1.9
UniProt
Find proteins for Q9X0D0 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q9X0D0 
Go to UniProtKB:  Q9X0D0
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 183.826α = 90
b = 139.8β = 90
c = 53.409γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-05-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection