2JJY

Crystal structure of Francisella tularensis enoyl reductase (ftFabI) with bound NAD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.206 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Slow-Onset Inhibition of the Fabi Enoyl Reductase from Francisella Tularensis: Residence Time and in Vivo Activity

Lu, H.England, K.Am Ende, C.Truglio, J.J.Luckner, S.R.Marlenee, N.Knudson, S.E.Knudson, D.L.Bowen, R.A.Kisker, C.Slayden, R.A.Tonge, P.J.

(2009) ACS Chem Biol 4: 221

  • DOI: https://doi.org/10.1021/cb800306y
  • Primary Citation of Related Structures:  
    2JJY

  • PubMed Abstract: 

    Francisella tularensis is a highly virulent and contagious Gram-negative intracellular bacterium that causes the disease tularemia in mammals. The high infectivity and the ability of the bacterium to survive for weeks in a cool, moist environment have raised the possibility that this organism could be exploited deliberately as a potential biological weapon. Fatty acid biosynthesis (FAS-II) is essential for bacterial viability and has been validated as a target for the discovery of novel antibacterials. The FAS-II enoyl reductase ftuFabI has been cloned and expressed, and a series of diphenyl ethers have been identified that are subnanomolar inhibitors of the enzyme with MIC90 values as low as 0.00018 microg mL(-1). The existence of a linear correlation between the Ki and MIC values strongly suggests that the antibacterial activity of the diphenyl ethers results from direct inhibition of ftuFabI within the cell. The compounds are slow-onset inhibitors of ftuFabI, and the residence time of the inhibitors on the enzyme correlates with their in vivo activity in a mouse model of tularemia infection. Significantly, the rate of breakdown of the enzyme-inhibitor complex is a better predictor of in vivo activity than the overall thermodynamic stability of the complex, a concept that has important implications for the discovery of novel chemotherapeutics that normally rely on equilibrium measurements of potency.


  • Organizational Affiliation

    Institute for Chemical Biology & Drug Discovery, Department of Chemistry, Stony Brook University, Stony Brook, New York11794-3400, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ENOYL-[ACYL-CARRIER-PROTEIN] REDUCTASE
A, B, C, D
268Francisella tularensisMutation(s): 0 
EC: 1.3.1.9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD

Download Ideal Coordinates CCD File 
E [auth D]NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.006α = 90
b = 99.454β = 90
c = 111.032γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-02-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Refinement description, Version format compliance
  • Version 1.2: 2024-05-08
    Changes: Data collection, Database references, Derived calculations, Other