1P45

Targeting tuberculosis and malaria through inhibition of enoyl reductase: compound activity and structural data


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Targeting tuberculosis and malaria through inhibition of Enoyl reductase: compound activity and structural data.

Kuo, M.R.Morbidoni, H.R.Alland, D.Sneddon, S.F.Gourlie, B.B.Staveski, M.M.Leonard, M.Gregory, J.S.Janjigian, A.D.Yee, C.Musser, J.M.Kreiswirth, B.Iwamoto, H.Perozzo, R.Jacobs, W.R.Sacchettini, J.C.Fidock, D.A.

(2003) J.Biol.Chem. 278: 20851-20859

  • DOI: 10.1074/jbc.M211968200
  • Primary Citation of Related Structures:  1P44

  • PubMed Abstract: 
  • Tuberculosis and malaria together result in an estimated 5 million deaths annually. The spread of multidrug resistance in the most pathogenic causative agents, Mycobacterium tuberculosis and Plasmodium falciparum, underscores the need to identify act ...

    Tuberculosis and malaria together result in an estimated 5 million deaths annually. The spread of multidrug resistance in the most pathogenic causative agents, Mycobacterium tuberculosis and Plasmodium falciparum, underscores the need to identify active compounds with novel inhibitory properties. Although genetically unrelated, both organisms use a type II fatty-acid synthase system. Enoyl acyl carrier protein reductase (ENR), a key type II enzyme, has been repeatedly validated as an effective antimicrobial target. Using high throughput inhibitor screens with a combinatorial library, we have identified two novel classes of compounds with activity against the M. tuberculosis and P. falciparum enzyme (referred to as InhA and PfENR, respectively). The crystal structure of InhA complexed with NAD+ and one of the inhibitors was determined to elucidate the mode of binding. Structural analysis of InhA with the broad spectrum antimicrobial triclosan revealed a unique stoichiometry where the enzyme contained either a single triclosan molecule, in a configuration typical of other bacterial ENR:triclosan structures, or harbored two triclosan molecules bound to the active site. Significantly, these compounds do not require activation and are effective against wild-type and drug-resistant strains of M. tuberculosis and P. falciparum. Moreover, they provide broader chemical diversity and elucidate key elements of inhibitor binding to InhA for subsequent chemical optimization.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Texas A & M University, College Station, Texas 77843, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Enoyl-[acyl-carrier-protein] reductase [NADH]
A, B
269Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Gene Names: inhA
EC: 1.3.1.9
Find proteins for P9WGR1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WGR1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD

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

Download SDF File 
Download CCD File 
A, B
TRICLOSAN
C12 H7 Cl3 O2
XEFQLINVKFYRCS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TCLKi: 200 - 220 nM (100) BINDINGDB
TCLIC50: 200 - 3000 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.225 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 94.822α = 90.00
b = 104.120β = 90.00
c = 189.746γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2003-09-16
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance