1ENZ

CRYSTAL STRUCTURE AND FUNCTION OF THE ISONIAZID TARGET OF MYCOBACTERIUM TUBERCULOSIS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 

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This is version 1.4 of the entry. See complete history. 


Literature

Crystal structure and function of the isoniazid target of Mycobacterium tuberculosis.

Dessen, A., Quemard, A., Blanchard, J.S., Jacobs Jr., W.R., Sacchettini, J.C.

(1995) Science 267: 1638-1641

  • DOI: 10.1126/science.7886450
  • Primary Citation of Related Structures:  
    1ENY, 1ENZ

  • PubMed Abstract: 

    • Resistance to isoniazid in Mycobacterium tuberculosis can be mediated by substitution of alanine for serine 94 in the InhA protein, the drug's primary target. InhA was shown to catalyze the beta-nicotinamide adenine dinucleotide (NADH)-specific reduction of 2-trans-enoyl-acyl carrier protein, an essential step in fatty acid elongation ...

    Resistance to isoniazid in Mycobacterium tuberculosis can be mediated by substitution of alanine for serine 94 in the InhA protein, the drug's primary target. InhA was shown to catalyze the beta-nicotinamide adenine dinucleotide (NADH)-specific reduction of 2-trans-enoyl-acyl carrier protein, an essential step in fatty acid elongation. Kinetic analyses suggested that isoniazid resistance is due to a decreased affinity of the mutant protein for NADH. The three-dimensional structures of wild-type and mutant InhA, refined to 2.2 and 2.7 angstroms, respectively, revealed that drug resistance is directly related to a perturbation in the hydrogen-bonding network that stabilizes NADH binding.

    Organizational Affiliation: 

    Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY 10461.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENOYL-ACYL CARRIER PROTEIN (ACP) 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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WGR1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD
Download Ideal Coordinates CCD File 
B [auth A]NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.14α = 90
b = 100.14β = 90
c = 139.95γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
TNTrefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-01-29
    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
  • Version 1.3: 2019-07-17
    Changes: Data collection, Other, Refinement description
  • Version 1.4: 2019-08-14
    Changes: Data collection, Refinement description