1QSG

CRYSTAL STRUCTURE OF ENOYL REDUCTASE INHIBITION BY TRICLOSAN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.172 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Structural basis and mechanism of enoyl reductase inhibition by triclosan.

Stewart, M.J., Parikh, S., Xiao, G., Tonge, P.J., Kisker, C.

(1999) J Mol Biol 290: 859-865

  • DOI: 10.1006/jmbi.1999.2907
  • Primary Citation of Related Structures:  
    1QSG

  • PubMed Abstract: 

    • The enoyl-acyl carrier protein reductase (ENR) is involved in bacterial fatty acid biosynthesis and is the target of the antibacterial diazaborine compounds and the front-line antituberculosis drug isoniazid. Recent studies suggest that ENR is also the target for the broad-spectrum biocide triclosan ...

    The enoyl-acyl carrier protein reductase (ENR) is involved in bacterial fatty acid biosynthesis and is the target of the antibacterial diazaborine compounds and the front-line antituberculosis drug isoniazid. Recent studies suggest that ENR is also the target for the broad-spectrum biocide triclosan. The 1.75 A crystal structure of EnvM, the ENR from Escherichia coli, in complex with triclosan and NADH reveals that triclosan binds specifically to EnvM. These data provide a molecular mechanism for the antibacterial activity of triclosan and substantiate the hypothesis that its activity results from inhibition of a specific cellular target rather than non-specific disruption of the bacterial cell membrane. This has important implications for the emergence of drug-resistant bacteria, since triclosan is an additive in many personal care products such as toothpastes, mouthwashes and soaps. Based on this structure, rational design of triclosan derivatives is possible which might be effective against recently identified triclosan-resistant bacterial strains.

    Organizational Affiliation: 

    Department of Pharmacological Sciences, SUNY at Stony Brook, Stony Brook, NY, 11794-8651, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENOYL-[ACYL-CARRIER-PROTEIN] REDUCTASE
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
265Escherichia coliMutation(s): 0 
EC: 1.3.1.9
UniProt
Find proteins for P0AEK4 (Escherichia coli (strain K12))
Explore P0AEK4 
Go to UniProtKB:  P0AEK4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AEK4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD
Download Ideal Coordinates CCD File 
BA [auth G],
EA [auth H],
J [auth A],
M [auth B],
P [auth C],
BA [auth G],
EA [auth H],
J [auth A],
M [auth B],
P [auth C],
S [auth D],
V [auth E],
Y [auth F]
NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N		 Ligand Interaction
TCL
Query on TCL
Download Ideal Coordinates CCD File 
CA [auth G],
FA [auth H],
K [auth A],
N [auth B],
Q [auth C],
CA [auth G],
FA [auth H],
K [auth A],
N [auth B],
Q [auth C],
T [auth D],
W [auth E],
Z [auth F]
TRICLOSAN
C12 H7 Cl3 O2
XEFQLINVKFYRCS-UHFFFAOYSA-N		 Ligand Interaction
GLC
Query on GLC
Download Ideal Coordinates CCD File 
AA [auth G],
DA [auth H],
I [auth A],
L [auth B],
O [auth C],
AA [auth G],
DA [auth H],
I [auth A],
L [auth B],
O [auth C],
R [auth D],
U [auth E],
X [auth F]
alpha-D-glucopyranose
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
TCL BindingDB:  1QSG IC50: min: 5, max: 900 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.172 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.733α = 89.54
b = 82.077β = 87.43
c = 84.177γ = 77.77
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-07-21
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Data collection, Database references, Derived calculations, Structure summary