1O8U

The 2 Angstrom Structure of 6-Oxo Camphor Hydrolase: New Structural Diversity in the Crotonase Superfamily


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.147 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The 2 a Crystal Structure of 6-Oxo Camphor Hydrolase: New Structural Diversity in the Crotonase Superfamily

Whittingham, J.L.Turkenburg, J.P.Verma, C.S.Walsh, M.A.Grogan, G.

(2003) J.Biol.Chem. 278: 1744

  • DOI: 10.1074/jbc.M211188200

  • PubMed Abstract: 
  • 6-Oxo camphor hydrolase (OCH) is an enzyme of the crotonase superfamily that catalyzes carbon-carbon bond cleavage in bicyclic beta-diketones via a retro-Claisen reaction (Grogan, G., Roberts, G. A., Bougioukou, D., Turner, N. J., and Flitsch, S. L. ...

    6-Oxo camphor hydrolase (OCH) is an enzyme of the crotonase superfamily that catalyzes carbon-carbon bond cleavage in bicyclic beta-diketones via a retro-Claisen reaction (Grogan, G., Roberts, G. A., Bougioukou, D., Turner, N. J., and Flitsch, S. L. (2001) J. Biol. Chem. 276, 12565-12572). The native structure of OCH has been solved at 2.0-A resolution with selenomethionine multiple wave anomalous dispersion and refined to a final R(free) of 19.0. The structure of OCH consists of a dimer of trimers that resembles the "parent" enzyme of the superfamily, enoyl-CoA hydratase. In contrast to enoyl-CoA hydratase, however, two octahedrally coordinated sodium atoms are found at the 3-fold axis of the hexamer of OCH, and the C-terminal helix of OCH does not form a discrete domain. Models of the substrate, 6-oxo camphor, and a proposed enolate intermediate in the putative active site suggest possible mechanistic roles for Glu-244, Asp-154, His-122, His-45, and His-145.


    Organizational Affiliation

    York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York, North Yorkshire YO10 5YW, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
6-OXO CAMPHOR HYDROLASE
A, B, C, D, E, F
257Rhodococcus spGene Names: camK
EC: 3.7.1.18
Find proteins for Q93TU6 (Rhodococcus sp)
Go to UniProtKB:  Q93TU6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A, D
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.147 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 78.950α = 90.00
b = 130.410β = 114.16
c = 81.320γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-01-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance