1ZID

LONG FATTY ACID CHAIN ENOYL-ACP REDUCTASE (INHA) IN COMPLEX WITH AN ISONICOTINIC-ACYL-NADH INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Modification of the NADH of the isoniazid target (InhA) from Mycobacterium tuberculosis.

Rozwarski, D.A.Grant, G.A.Barton, D.H.Jacobs Jr., W.R.Sacchettini, J.C.

(1998) Science 279: 98-102

  • DOI: 10.1126/science.279.5347.98
  • Primary Citation of Related Structures:  
    1ZID

  • PubMed Abstract: 
  • The preferred antitubercular drug isoniazid specifically targets a long-chain enoyl-acyl carrier protein reductase (InhA), an enzyme essential for mycolic acid biosynthesis in Mycobacterium tuberculosis. Despite the widespread use of this drug for more than 40 years, its precise mode of action has remained obscure ...

    The preferred antitubercular drug isoniazid specifically targets a long-chain enoyl-acyl carrier protein reductase (InhA), an enzyme essential for mycolic acid biosynthesis in Mycobacterium tuberculosis. Despite the widespread use of this drug for more than 40 years, its precise mode of action has remained obscure. Data from x-ray crystallography and mass spectrometry reveal that the mechanism of isoniazid action against InhA is covalent attachment of the activated form of the drug to the nicotinamide ring of nicotinamide adenine dinucleotide bound within the active site of InhA.


    Related Citations: 
    • Crystal Structure and Function of the Isoniazid Target of Mycobacterium Tuberculosis
      Dessen, A., Quemard, A., Blanchard, J.S., Jacobs Junior, W.R., Sacchettini, J.C.
      (1995) Science 267: 1638

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENOYL-[ACYL-CARRIER-PROTEIN] REDUCTASEA268Mycobacterium tuberculosisMutation(s): 0 
EC: 1.3.1.9
UniProt
Find proteins for P9WGR1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WGR1 
Go to UniProtKB:  P9WGR1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZID (Subject of Investigation/LOI)
Query on ZID

Download Ideal Coordinates CCD File 
B [auth A]ISONICOTINIC-ACETYL-NICOTINAMIDE-ADENINE DINUCLEOTIDE
C27 H30 N8 O15 P2
SURAWYIAXPVHGO-XDBKRARRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.53α = 90
b = 100.53β = 90
c = 138.96γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-03-25
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance