2NTN

Crystal structure of MabA-C60V/G139A/S144L

• PDB DOI: https://doi.org/10.2210/pdb2NTN/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Mycobacterium tuberculosis H37Rv
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2006-11-08 Released: 2006-11-21 
• Deposition Author(s): Poncet-Montange, G., Ducasse-Cabanot, S., Quemard, A., Labesse, G., Cohen-Gonsaud, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.238 
• R-Value Work: 0.177 
• R-Value Observed: 0.181 

Starting Model: experimental

Literature

Lack of dynamics in the MabA active site kills the enzyme activity: practical consequences for drug-design studies

Poncet-Montange, G., Ducasse-Cabanot, S., Quemard, A., Labesse, G., Cohen-Gonsaud, M.

(2007) Acta Crystallogr D Biol Crystallogr 63: 923-925

• PubMed: 17642518 
• DOI: https://doi.org/10.1107/S0907444907024158
• Primary Citation of Related Structures:  
  2NTN


• PubMed Abstract: 
  

  The MabA protein from Mycobacterium tuberculosis is a validated drug target. Previous structural studies of this protein showed dynamic behaviour in the catalytic site and described motion between an open 'active' holo form (with NADP) and a closed 'inactive' apo form (without NADP). Here, a mutation (G139A) is reported that leads to complete protein inactivation and freezes the catalytic site into its closed form, even in the presence of the cofactor. This observation suggests a new way to develop anti-MabA drugs via protein stabilization of the 'inactive' form.

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Organizational Affiliation: 

CNRS UMR5048, Centre de Biochimie Structurale, F-34090 Montpellier, France.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 55.87 kDa 
• Atom Count: 3,304 
• Modelled Residue Count: 425 
• Deposited Residue Count: 534 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3-oxoacyl-[acyl-carrier-protein] reductase	A, B	267	Mycobacterium tuberculosis H37Rv	Mutation(s): 3  Gene Names: fabG, fabG1 EC: 1.1.1.100
UniProt
Find proteins for P9WGT3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WGT3  Go to UniProtKB:  P9WGT3

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.238 
• R-Value Work: 0.177 
• R-Value Observed: 0.181 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.613	α = 90
b = 117.285	β = 121.9
c = 52.272	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-11-21 
Deposition Author(s): Poncet-Montange, G., Ducasse-Cabanot, S., Quemard, A., Labesse, G., Cohen-Gonsaud, M.

Revision History  

• Version 1.0: 2006-11-21
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Derived calculations, Version format compliance
• Version 1.3: 2021-11-10
  Changes: Database references
• Version 1.4: 2023-10-25
  Changes: Data collection, Refinement description