1IDU

CRYSTAL STRUCTURE OF THE PEROXIDE FORM OF THE VANADIUM-CONTAINING CHLOROPEROXIDASE FROM CURVULARIA INAEQUALIS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.24 Å
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Implications for the catalytic mechanism of the vanadium-containing enzyme chloroperoxidase from the fungus Curvularia inaequalis by X-ray structures of the native and peroxide form.

Messerschmidt, A.Prade, L.Wever, R.

(1997) Biol.Chem. 378: 309-315

  • Primary Citation of Related Structures:  1IDQ

  • PubMed Abstract: 
  • Implications for the catalytic mechanism of the vanadium-containing chloroperoxidase from the fungus Curvularia inaequalis have been obtained from the crystal structures of the native and peroxide forms of the enzyme. The X-ray structures have been s ...

    Implications for the catalytic mechanism of the vanadium-containing chloroperoxidase from the fungus Curvularia inaequalis have been obtained from the crystal structures of the native and peroxide forms of the enzyme. The X-ray structures have been solved by difference Fourier techniques using the atomic model of the azide chloroperoxidase complex. The 2.03 A crystal structure (R = 19.7%) of the native enzyme reveals the geometry of the intact catalytic vanadium center. The vanadium is coordinated by four non-protein oxygen atoms and one nitrogen (NE2) atom from histidine 496 in a trigonal bipyramidal fashion. Three oxygens are in the equatorial plane and the fourth oxygen and the nitrogen are at the apexes of the bipyramid. In the 2.24 A crystal structure (R = 17.7%) of the peroxide derivate the peroxide is bound to the vanadium in an eta2-fashion after the release of the apical oxygen ligand. The vanadium is coordinated also by 4 non-protein oxygen atoms and one nitrogen (NE2) from histidine 496. The coordination geometry around the vanadium is that of a distorted tetragonal pyramid with the two peroxide oxygens, one oxygen and the nitrogen in the basal plane and one oxygen in the apical position. A mechanism for the catalytic cycle has been proposed based on these X-ray structures and kinetic data.


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Martinsried bei München, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VANADIUM CHLOROPEROXIDASE
A
609Curvularia inaequalisGene Names: CPO
EC: 1.11.1.10
Find proteins for P49053 (Curvularia inaequalis)
Go to Gene View: CPO
Go to UniProtKB:  P49053
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
VO4
Query on VO4

Download SDF File 
Download CCD File 
A
VANADATE ION
O4 V
LSGOVYNHVSXFFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.24 Å
  • R-Value Work: 0.177 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 129.950α = 90.00
b = 129.950β = 90.00
c = 111.710γ = 120.00
Software Package:
Software NamePurpose
CCP4:model building
CCP4data scaling
FFTmodel building
X-PLORrefinement
SFCALCphasing
MOSFLMdata reduction
FFTphasing
ROTAVATAdata scaling
CCP4phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-04-11
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Advisory, Refinement description