2NTJ

Mycobacterium tuberculosis InhA bound with PTH-NAD adduct


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Mechanism of thioamide drug action against tuberculosis and leprosy.

Wang, F.Langley, R.Gulten, G.Dover, L.G.Besra, G.S.Jacobs, W.R.Sacchettini, J.C.

(2007) J.Exp.Med. 204: 73-78

  • DOI: 10.1084/jem.20062100
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Thioamide drugs, ethionamide (ETH) and prothionamide (PTH), are clinically effective in the treatment of Mycobacterium tuberculosis, M. leprae, and M. avium complex infections. Although generally considered second-line drugs for tuberculosis, their u ...

    Thioamide drugs, ethionamide (ETH) and prothionamide (PTH), are clinically effective in the treatment of Mycobacterium tuberculosis, M. leprae, and M. avium complex infections. Although generally considered second-line drugs for tuberculosis, their use has increased considerably as the number of multidrug resistant and extensively drug resistant tuberculosis cases continues to rise. Despite the widespread use of thioamide drugs to treat tuberculosis and leprosy, their precise mechanisms of action remain unknown. Using a cell-based activation method, we now have definitive evidence that both thioamides form covalent adducts with nicotinamide adenine dinucleotide (NAD) and that these adducts are tight-binding inhibitors of M. tuberculosis and M. leprae InhA. The crystal structures of the inhibited M. leprae and M. tuberculosis InhA complexes provide the molecular details of target-drug interactions. The purified ETH-NAD and PTH-NAD adducts both showed nanomolar Kis against M. tuberculosis and M. leprae InhA. Knowledge of the precise structures and mechanisms of action of these drugs provides insights into designing new drugs that can overcome drug resistance.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Enoyl-[acyl-carrier-protein] reductase [NADH
A, B
268Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 1 
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 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P1H
Query on P1H

Download SDF File 
Download CCD File 
A, B
{(2R,3S,4R,5R)-5-[(4S)-3-(AMINOCARBONYL)-4-(2-PROPYLISONICOTINOYL)PYRIDIN-1(4H)-YL]-3,4-DIHYDROXYTETRAHYDROFURAN-2-YL}METHYL [(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-3,4-DIHYDROXYTETRAHYDROFURAN-2-YL]METHYL DIHYDROGEN DIPHOSPHATE
2-PROPYL-ISONICOTINIC-ACYL-NICOTINAMIDE-ADENINE DINUCLEOTIDE
C30 H38 N8 O15 P2
INZZWAGIWIYXKO-NNTKUHMYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
P1HKi: 2 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.216 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 91.592α = 90.00
b = 100.521β = 90.00
c = 186.499γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
CrystalCleardata collection
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-01-30
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance