1UZM

MabA from Mycobacterium tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of Maba from Mycobacterium Tuberculosis, a Reductase Involved in Long-Chain Fatty Acid Biosynthesis.

Cohen-Gonsaud, M.Ducasse, S.Hoh, F.Zerbib, D.Labesse, G.Quemard, A.

(2002) J Mol Biol 320: 249

  • DOI: 10.1016/S0022-2836(02)00463-1
  • Primary Citation of Related Structures:  
    1UZM, 1UZL, 1UZN

  • PubMed Abstract: 
  • The fatty acid elongation system FAS-II is involved in the biosynthesis of mycolic acids, which are major and specific long-chain fatty acids of the cell envelope of Mycobacterium tuberculosis and other mycobacteria, including Mycobacterium smegmatis. The protein MabA, also named FabG1, has been shown recently to be part of FAS-II and to catalyse the NADPH-specific reduction of long chain beta-ketoacyl derivatives ...

    The fatty acid elongation system FAS-II is involved in the biosynthesis of mycolic acids, which are major and specific long-chain fatty acids of the cell envelope of Mycobacterium tuberculosis and other mycobacteria, including Mycobacterium smegmatis. The protein MabA, also named FabG1, has been shown recently to be part of FAS-II and to catalyse the NADPH-specific reduction of long chain beta-ketoacyl derivatives. This activity corresponds to the second step of an FAS-II elongation round. FAS-II is inhibited by the antituberculous drug isoniazid through the inhibition of the 2-trans-enoyl-acyl carrier protein reductase InhA. Thus, the other enzymes making up this enzymatic complex represent potential targets for designing new antituberculous drugs. The crystal structure of the apo-form MabA was solved to 2.03 A resolution by molecular replacement. MabA is tetrameric and shares the conserved fold of the short-chain dehydrogenases/reductases (SDRs). However, it exhibits some significant local rearrangements of the active-site loops in the absence of a cofactor, particularly the beta5-alpha5 region carrying the unique tryptophan residue, in agreement with previous fluorescence spectroscopy data. A similar conformation has been observed in the beta-ketoacyl reductase from Escherichia coli and the distantly related dehydratase. The distinctive enzymatic and structural properties of MabA are discussed in view of its crystal structure and that of related enzymes.


    Organizational Affiliation

    Centre de Biochimie Structurale (INSERM U554-CNRS UMR5048-UM1), 29 rue de Navacelles, 34090 Montpellier cedex, France. martin@cbs.cnrs.fr



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-OXOACYL-[ACYL-CARRIER PROTEIN] REDUCTASEA, B247Mycobacterium tuberculosis H37RvMutation(s): 2 
Gene Names: fabG1mabARv1483MTCY277.04
EC: 1.1.1.100
UniProt
Find proteins for P9WGT3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WGT3 
Go to UniProtKB:  P9WGT3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.274α = 90
b = 116.991β = 122.05
c = 51.977γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2020-03-25
    Changes: Advisory, Derived calculations, Other