1UH5

Crystal Structure of Enoyl-ACP Reductase with Triclosan at 2.2angstroms


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for the variation in triclosan affinity to enoyl reductases.

Pidugu, L.S.Kapoor, M.Surolia, N.Surolia, A.Suguna, K.

(2004) J Mol Biol 343: 147-155

  • DOI: 10.1016/j.jmb.2004.08.033
  • Primary Citation of Related Structures:  
    1UH5, 1V35

  • PubMed Abstract: 
  • Bacteria synthesize fatty acids in a dissociated type pathway different from that in humans. Enoyl acyl carrier protein reductase, which catalyzes the final step of fatty acid elongation, has been validated as a potential anti-microbial drug target. ...

    Bacteria synthesize fatty acids in a dissociated type pathway different from that in humans. Enoyl acyl carrier protein reductase, which catalyzes the final step of fatty acid elongation, has been validated as a potential anti-microbial drug target. Triclosan is known to inhibit this enzyme effectively. Precise characterization of the mode of triclosan binding is required to develop highly specific inhibitors. With this in view, interactions between triclosan, the cofactor NADH/NAD+ and the enzyme from five different species, one plant and four of microbial origin, have been examined in the available crystal structures. A comparison of these structures shows major structural differences at the substrate/inhibitor/cofactor-binding loop. The analysis reveals that the conformation of this flexible loop and the binding affinities of triclosan to each of these enzymes are strongly correlated.


    Related Citations: 
    • Kinetic and structural analysis of the increased affinity of enoyl-ACP (acyl-carrier protein) reductase for triclosan in the presence of NAD+
      Kapoor, M., Swarnamukhi, P.L., Surolia, N., Suguna, K., Surolia, A.
      (2004) Biochem J 381: 725

    Organizational Affiliation

    Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
enoyl-ACP reductaseA, B329Plasmodium falciparumMutation(s): 0 
Gene Names: FabI
EC: 1.3.1.9
Find proteins for Q9BJJ9 (Plasmodium falciparum)
Explore Q9BJJ9 
Go to UniProtKB:  Q9BJJ9
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD

Download CCD File 
A, B
NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
 Ligand Interaction
TCL
Query on TCL

Download CCD File 
A, B
TRICLOSAN
C12 H7 Cl3 O2
XEFQLINVKFYRCS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TCLKi:  0   nM  BindingDB
TCLKi:  8   nM  BindingDB
TCLKi:  8.25   nM  BindingDB
TCLKi:  10   nM  BindingDB
TCLIC50:  73   nM  BindingDB
TCLIC50:  70   nM  BindingDB
TCLIC50:  200   nM  BindingDB
TCLIC50:  66   nM  BindingDB
TCLKi:  0.10999999940395355   nM  BindingDB
TCLIC50:  73   nM  BindingDB
TCLKi:  7.289999961853027   nM  BindingDB
TCLKi:  13.720000267028809   nM  BindingDB
TCLIC50:  49   nM  BindingDB
TCLKi:  1   nM  BindingDB
TCLKi:  0.05000000074505806   nM  BindingDB
TCLKi:  0.800000011920929   nM  BindingDB
TCLKi:  0.2800000011920929   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.180 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 133.016α = 90
b = 133.016β = 90
c = 83.659γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations