Crystal structure of N-terminal domain of FACL13 from Mycobacterium tuberculosis in different space group C2

Experimental Data Snapshot

  • Resolution: 2.09 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

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Molecular basis of the functional divergence of fatty acyl-AMP ligase biosynthetic enzymes of Mycobacterium tuberculosis.

Goyal, A.Verma, P.Anandhakrishnan, M.Gokhale, R.S.Sankaranarayanan, R.

(2012) J Mol Biol 416: 221-238

  • DOI: https://doi.org/10.1016/j.jmb.2011.12.031
  • Primary Citation of Related Structures:  
    3T5A, 3T5B, 3T5C

  • PubMed Abstract: 

    Activation of fatty acids as acyl-adenylates by fatty acyl-AMP ligases (FAALs) in Mycobacterium tuberculosis is a variant of a classical theme that involves formation of acyl-CoA (coenzyme A) by fatty acyl-CoA ligases (FACLs). Here, we show that FAALs and FACLs possess similar structural fold and substrate specificity determinants, and the key difference is the absence of a unique insertion sequence in FACL13 structure. A systematic analysis shows a conserved hydrophobic anchorage of the insertion motif across several FAALs. Strikingly, mutagenesis of two phenylalanine residues, which are part of the anchorage, to alanine converts FAAL32 to FACL32. This insertion-based in silico analysis suggests the presence of FAAL homologues in several other non-mycobacterial genomes including eukaryotes. The work presented here establishes an elegant mechanism wherein an insertion sequence drives the functional divergence of FAALs from canonical FACLs.

  • Organizational Affiliation

    Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad 500 007, India.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
396Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: fadD13MT3174Rv3089
EC: 6.2.1 (PDB Primary Data), (UniProt)
Find proteins for P9WQ37 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WQ37 
Go to UniProtKB:  P9WQ37
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WQ37
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.09 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.228α = 90
b = 91.983β = 130.79
c = 84.412γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-25
    Type: Initial release
  • Version 1.1: 2013-07-10
    Changes: Database references
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Refinement description