Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 67.72 kDa 
• Atom Count: 5096 
• Modelled Residue Count: 576 
• Deposited Residue Count: 609 
• Unique protein chains: 1

1IDU

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

• DOI: 10.2210/pdb1IDU/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Curvularia inaequalis
• Mutation(s): No 


• Deposited: 2001-04-05 Released: 2001-04-11 
• Deposition Author(s): Messerschmidt, A., Prade, L., Wever, R.

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Experimental Data Snapshot

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

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

• PubMed: 9165086 
• DOI: 10.1515/bchm.1997.378.3-4.309
• Primary Citation of Related Structures:  
  1IDQ, 1IDU


• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
VANADIUM CHLOROPEROXIDASE	A	609	Curvularia inaequalis	Mutation(s): 0  Gene Names: CPO EC: 1.11.1.10
Find proteins for P49053 (Curvularia inaequalis) Explore P49053  Go to UniProtKB:  P49053

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
VO4	A	VANADATE ION O4 V LSGOVYNHVSXFFJ-UHFFFAOYSA-N

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 = 129.95	α = 90
b = 129.95	β = 90
c = 111.71	γ = 120

Software Package:

Software Name	Purpose
CCP4:	model building
FFT	model building
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
ROTAVATA	data scaling
CCP4	phasing
SFCALC	phasing
FFT	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-04-05 
• Released Date: 2001-04-11 
Deposition Author(s): Messerschmidt, A., Prade, L., Wever, R.

Revision History  

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