1A8U

CHLOROPEROXIDASE T/BENZOATE COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1A8U/pdb

• Classification: HALOPEROXIDASE
• Organism(s): Kitasatospora aureofaciens
• Expression System: Streptomyces lividans
• Mutation(s): No 


• Deposited: 1998-03-26 Released: 1998-06-17 
• Deposition Author(s): Hofmann, B., Toelzer, S., Pelletier, I., Altenbuchner, J., Van Pee, K.-H., Hecht, H.-J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.171 
• R-Value Work: 0.152 
• R-Value Observed: 0.149 

Starting Model: experimental

Literature

Structural investigation of the cofactor-free chloroperoxidases.

Hofmann, B., Tolzer, S., Pelletier, I., Altenbuchner, J., van Pee, K.H., Hecht, H.J.

(1998) J Mol Biol 279: 889-900

• PubMed: 9642069 
• DOI: https://doi.org/10.1006/jmbi.1998.1802
• Primary Citation of Related Structures:  
  1A7U, 1A88, 1A8Q, 1A8S, 1A8U, 1BRT


• PubMed Abstract: 
  

  The structures of cofactor-free haloperoxidases from Streptomyces aureofaciens, Streptomyces lividans, and Pseudomonas fluorescens have been determined at resolutions between 1.9 A and 1.5 A. The structures of two enzymes complexed with benzoate or propionate identify the binding site for the organic acids which are required for the haloperoxidase activity. Based on these complexes and on the structure of an inactive variant, a reaction mechanism is proposed for the halogenation reaction with peroxoacid and hypohalous acid as reaction intermediates. Comparison of the structures suggests that a specific halide binding site is absent in the enzymes but that hydrophobic organic compounds may fit into the active site pocket for halogenation at preferential sites.

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Organizational Affiliation: 

Department SF, GBF (Gesellschaft für Biotechnologische Forschung), Mascheroder Weg 1, Braunschweig, D-38124, FRG.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 61.22 kDa 
• Atom Count: 5,004 
• Modelled Residue Count: 554 
• Deposited Residue Count: 554 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHLOROPEROXIDASE T	A, B	277	Kitasatospora aureofaciens	Mutation(s): 0  Gene Names: CPOT EC: 1.11.1.10 (PDB Primary Data), 1.11.1 (UniProt)
UniProt
Find proteins for O31168 (Kitasatospora aureofaciens) Explore O31168  Go to UniProtKB:  O31168

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BEZ	F [auth A], I [auth B]	BENZOIC ACID C7 H6 O2 WPYMKLBDIGXBTP-UHFFFAOYSA-N
SO4	C [auth A], D [auth A], E [auth A], G [auth B], H [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.171 
• R-Value Work: 0.152 
• R-Value Observed: 0.149 
• Space Group: P 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 124.87	α = 90
b = 124.87	β = 90
c = 124.87	γ = 90

Software Package:

Software Name	Purpose
CCP4	model building
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-06-17 
Deposition Author(s): Hofmann, B., Toelzer, S., Pelletier, I., Altenbuchner, J., Van Pee, K.-H., Hecht, H.-J.

Revision History  

• Version 1.0: 1998-06-17
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-02
  Changes: Database references, Derived calculations, Other, Refinement description
• Version 1.4: 2024-05-22
  Changes: Data collection