1GQW

Taurine/alpha-ketoglutarate Dioxygenase from Escherichia coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.281 
  • R-Value Observed: 0.281 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

X-Ray Crystal Structure of Escherichia Coli Taurine/Alpha-Ketoglutarate Dioxygenase Complexed to Ferrous Iron and Substrates

Elkins, J.M.Ryle, M.J.Clifton, I.J.Dunning Hotopp, J.Lloyd, J.S.Burzlaff, N.I.Baldwin, J.E.Hausinger, R.P.Roach, P.L.

(2002) Biochemistry 41: 5185

  • DOI: https://doi.org/10.1021/bi016014e
  • Primary Citation of Related Structures:  
    1GQW, 1GY9

  • PubMed Abstract: 

    Taurine/alpha-ketoglutarate dioxygenase (TauD), a non-heme Fe(II) oxygenase, catalyses the conversion of taurine (2-aminoethanesulfonate) to sulfite and aminoacetaldehyde concurrent with the conversion of alpha-ketoglutarate (alphaKG) to succinate and CO(2). The enzyme allows Escherichia coli to use taurine, widely available in the environment, as an alternative sulfur source. Here we describe the X-ray crystal structure of TauD complexed to Fe(II) and both substrates, alphaKG and taurine. The tertiary structure and fold of TauD are similar to those observed in other enzymes from the broad family of Fe(II)/alphaKG-dependent oxygenases, with closest structural similarity to clavaminate synthase. Using the TauD coordinates, a model was determined for the closely related enzyme 2,4-dichlorophenoxyacetate/alphaKG dioxygenase (TfdA), supporting predictions derived from site-directed mutagenesis and other studies of that biodegradative protein. The TauD structure and TfdA model define the metal ligands and the positions of nearby aromatic residues that undergo post-translational modifications involving self-hydroxylation reactions. The substrate binding residues of TauD were identified and those of TfdA predicted. These results, along with sequence alignment information, reveal how TauD selects a tetrahedral substrate anion in preference to the planar carboxylate selected by TfdA, providing insight into the mechanism of enzyme catalysis.


  • Organizational Affiliation

    Dyson Perrins Laboratory, Oxford University, South Parks Road, Oxford, England, OX1 3QY, and Departments of Microbiology & Molecular Genetics and Biochemistry & Molecular Biology, Michigan State University, East Lansing, Michigan 48824-1011.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ALPHA-KETOGLUTARATE-DEPENDENT TAURINE DIOXYGENASE
A, B
283Escherichia coliMutation(s): 0 
EC: 1.14.11.17
UniProt
Find proteins for P37610 (Escherichia coli (strain K12))
Explore P37610 
Go to UniProtKB:  P37610
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37610
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.281 
  • R-Value Observed: 0.281 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.85α = 90
b = 116.85β = 90
c = 201.91γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-04-18
    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: 2024-05-08
    Changes: Data collection, Database references, Derived calculations, Other