1QSG | pdb_00001qsg

CRYSTAL STRUCTURE OF ENOYL REDUCTASE INHIBITION BY TRICLOSAN

PDB DOI: https://doi.org/10.2210/pdb1QSG/pdb

Classification: OXIDOREDUCTASE
Organism(s): Escherichia coli
Expression System: Escherichia coli
Mutation(s): No

Deposited: 1999-06-21 Released: 1999-07-21
Deposition Author(s): Stewart, M.J., Parikh, S., Xiao, G., Tonge, P.J., Kisker, C.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.75 Å
R-Value Free:
0.215 (Depositor)
R-Value Work:
0.172 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

This is version 1.4 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 Biology 290: 859-865

PubMed: 10398587 Search on PubMed
DOI: https://doi.org/10.1006/jmbi.1999.2907
Primary Citation 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 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.

Macromolecule Content

Total Structure Weight: 234.47 kDa
Atom Count: 17,287
Modeled Residue Count: 2,065
Deposited Residue Count: 2,120
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ENOYL-[ACYL-CARRIER-PROTEIN] REDUCTASE	A, B, C, D, E A, B, C, D, E, F, G, H	265	Escherichia coli	Mutation(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 Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P0AEK4
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
NAD Query on NAD Download:Ideal Coordinates CCD File SDF format, chain BA [auth G] SDF format, chain EA [auth H] SDF format, chain J [auth A] SDF format, chain M [auth B] SDF format, chain P [auth C] SDF format, chain S [auth D] SDF format, chain Y [auth F] SDF format, chain V [auth E] MOL2 format, chain BA [auth G] MOL2 format, chain EA [auth H] MOL2 format, chain J [auth A] MOL2 format, chain M [auth B] MOL2 format, chain P [auth C] MOL2 format, chain S [auth D] MOL2 format, chain Y [auth F] MOL2 format, chain V [auth E] mmCIF format, chain BA [auth G] mmCIF format, chain EA [auth H] mmCIF format, chain J [auth A] mmCIF format, chain M [auth B] mmCIF format, chain P [auth C] mmCIF format, chain S [auth D] mmCIF format, chain Y [auth F] mmCIF format, chain V [auth E]	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		Interactions Focus chain BA [auth G] Focus chain EA [auth H] Focus chain J [auth A] Focus chain M [auth B] Focus chain P [auth C] Focus chain S [auth D] Focus chain V [auth E] Focus chain Y [auth F]
TCL Query on TCL Download:Ideal Coordinates CCD File SDF format, chain CA [auth G] SDF format, chain K [auth A] SDF format, chain Q [auth C] SDF format, chain T [auth D] SDF format, chain W [auth E] SDF format, chain Z [auth F] SDF format, chain N [auth B] SDF format, chain FA [auth H] MOL2 format, chain CA [auth G] MOL2 format, chain K [auth A] MOL2 format, chain Q [auth C] MOL2 format, chain T [auth D] MOL2 format, chain W [auth E] MOL2 format, chain Z [auth F] MOL2 format, chain N [auth B] MOL2 format, chain FA [auth H] mmCIF format, chain CA [auth G] mmCIF format, chain K [auth A] mmCIF format, chain Q [auth C] mmCIF format, chain T [auth D] mmCIF format, chain W [auth E] mmCIF format, chain Z [auth F] mmCIF format, chain N [auth B] mmCIF format, chain FA [auth H]	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		Interactions Focus chain CA [auth G] Focus chain FA [auth H] Focus chain K [auth A] Focus chain N [auth B] Focus chain Q [auth C] Focus chain T [auth D] Focus chain W [auth E] Focus chain Z [auth F]
GLC Query on GLC Download:Ideal Coordinates CCD File SDF format, chain DA [auth H] SDF format, chain I [auth A] SDF format, chain L [auth B] SDF format, chain R [auth D] SDF format, chain U [auth E] SDF format, chain X [auth F] SDF format, chain O [auth C] SDF format, chain AA [auth G] MOL2 format, chain DA [auth H] MOL2 format, chain I [auth A] MOL2 format, chain L [auth B] MOL2 format, chain R [auth D] MOL2 format, chain U [auth E] MOL2 format, chain X [auth F] MOL2 format, chain O [auth C] MOL2 format, chain AA [auth G] mmCIF format, chain DA [auth H] mmCIF format, chain I [auth A] mmCIF format, chain L [auth B] mmCIF format, chain R [auth D] mmCIF format, chain U [auth E] mmCIF format, chain X [auth F] mmCIF format, chain O [auth C] mmCIF format, chain AA [auth G]	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		Interactions Focus chain AA [auth G] Focus chain DA [auth H] Focus chain I [auth A] Focus chain L [auth B] Focus chain O [auth C] Focus chain R [auth D] Focus chain U [auth E] Focus chain X [auth F]

Binding Affinity Annotations
ID	Source	Binding Affinity
TCL	BindingDB: 1QSG	Ki: 7.00e-3 (nM) from 1 assay(s)
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 (Depositor)
R-Value Work: 0.172 (Depositor)

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.733	α = 89.54
b = 82.077	β = 87.43
c = 84.177	γ = 77.77

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
REFMAC	refinement

Structure Validation

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Entry History

Deposition Data

Released Date: 1999-07-21

Deposition Author(s):

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
Version 1.4: 2023-08-16
Changes: Data collection, Database references, Refinement description, Structure summary