NMR structure of the mouse thiamine triphosphatase

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.6 of the entry. See complete history


Structural basis for the catalytic mechanism of mammalian 25-kDa thiamine triphosphatase.

Song, J.Bettendorff, L.Tonelli, M.Markley, J.L.

(2008) J Biol Chem 283: 10939-10948

  • DOI: https://doi.org/10.1074/jbc.M709675200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Mammalian soluble thiamine triphosphatase (ThTPase) is a 25-kDa cytosolic enzyme that specifically catalyzes the conversion of thiamine triphosphate (ThTP) to thiamine diphosphate and has an absolute requirement for divalent cations. We have investigated the kinetic properties of recombinant mouse thiamine triphosphatase (mThTPase) and determined its solution structure by NMR spectroscopy. Residues responsible for binding Mg(2+) and ThTP were determined from NMR titration experiments. The binding of Mg(2+) induced only a minor local conformational change, whereas ThTP binding was found to cause a more global conformational change. We derived a structural model for the mThTPase.ThTP.Mg(2+) ternary complex and concluded from this that whereas free mThTPase has an open cleft fold, the enzyme in the ternary complex adopts a tunnel fold. Our results provide a functional rationale for a number of conserved residues and suggest an essential role for Mg(2+) in catalysis. We propose a mechanism underlying the high substrate specificity of mThTPase and discuss the possible role of water molecules in enzymatic catalysis.

  • Organizational Affiliation

    Center for Eukaryotic Structural Genomics and National Magnetic Resonance Facility at Madison, Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706-1544, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thiamine-triphosphatase224Mus musculusMutation(s): 0 
Gene Names: Thtpa
UniProt & NIH Common Fund Data Resources
Find proteins for Q8JZL3 (Mus musculus)
Explore Q8JZL3 
Go to UniProtKB:  Q8JZL3
IMPC:  MGI:2446078
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8JZL3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-19
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-02-05
    Changes: Data collection, Database references, Derived calculations, Experimental preparation, Other
  • Version 1.4: 2023-06-14
    Changes: Database references, Other
  • Version 1.5: 2023-12-20
    Changes: Data collection, Other
  • Version 1.6: 2024-05-08
    Changes: Database references