Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 163.91 kDa 
• Atom Count: 11883 
• Modelled Residue Count: 1434 
• Deposited Residue Count: 1486 
• Unique protein chains: 1

1SJ2

Crystal structure of Mycobacterium tuberculosis catalase-peroxidase

• DOI: 10.2210/pdb1SJ2/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Mycobacterium tuberculosis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-03-02 Released: 2004-07-20 
• Deposition Author(s): Bertrand, T., Eady, N.A.J., Jones, J.N., Bodiguel, J., Jesmin, Nagy, J.M., Raven, E.L., Jamart-Gregoire, B., Brown, K.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.41 Å
• R-Value Free: 0.268 
• R-Value Work: 0.211 

Literature

Crystal Structure of Mycobacterium tuberculosis Catalase-Peroxidase.

Bertrand, T., Eady, N.A.J., Jones, J.N., Jesmin, Nagy, J.M., Jamart-Gregoire, B., Raven, E.L., Brown, K.A.

(2004) J Biol Chem 279: 38991-38999

• PubMed: 15231843 
• DOI: 10.1074/jbc.M402382200
• Primary Citation of Related Structures:  
  1SJ2


• PubMed Abstract: 
  

The Mycobacterium tuberculosis catalase-peroxidase is a multifunctional heme-dependent enzyme that activates the core anti-tuberculosis drug isoniazid. Numerous studies have been undertaken to elucidate the enzyme-dependent mechanism of isoniazid activation, and it is well documented that mutations that reduce activity or inactivate the catalase-peroxidase lead to increased levels of isoniazid resistance in M. tuberculosis. Interpretation of the catalytic activities and the effects of mutations upon the action of the enzyme to date have been limited due to the lack of a three-dimensional structure for this enzyme. In order to provide a more accurate model of the three-dimensional structure of the M. tuberculosis catalase-peroxidase, we have crystallized the enzyme and now report its crystal structure refined to 2.4-A resolution. The structure reveals new information about dimer assembly and provides information about the location of residues that may play a role in catalysis including candidates for protein-based radical formation. Modeling and computational studies suggest that the binding site for isoniazid is located near the delta-meso heme edge rather than in a surface loop structure as currently proposed. The availability of a crystal structure for the M. tuberculosis catalase-peroxidase also permits structural and functional effects of mutations implicated in causing elevated levels of isoniazid resistance in clinical isolates to be interpreted with improved confidence.

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Organizational Affiliation: 

Department of Biological Sciences, Centre for Molecular Microbiology and Infection, Flowers Building, Imperial College London, London SW7 2AZ, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Peroxidase/catalase T	A, B	743	Mycobacterium tuberculosis	Mutation(s): 0  Gene Names: katG, Rv1908c, MT1959, MTCY180.10 EC: 1.11.1.6 (PDB Primary Data), 1.11.1.21 (UniProt)
Find proteins for P9WIE5 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WIE5  Go to UniProtKB:  P9WIE5

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	C [auth A], G [auth B]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
GOL	D [auth A], E [auth A], F [auth A], H [auth B], I [auth B], J [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.41 Å
• R-Value Free: 0.268 
• R-Value Work: 0.211 
• Space Group: P 4₂ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 150.33	α = 90
b = 150.33	β = 90
c = 154.281	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-03-02 
• Released Date: 2004-07-20 
Deposition Author(s): Bertrand, T., Eady, N.A.J., Jones, J.N., Bodiguel, J., Jesmin, Nagy, J.M., Raven, E.L., Jamart-Gregoire, B., Brown, K.A.

Revision History  

• Version 1.0: 2004-07-20
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance