4O1M

Toxoplasma gondii Enoyl acyl carrier protein reductase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

The benzimidazole based drugs show good activity against T. gondii but poor activity against its proposed enoyl reductase enzyme target

Wilkinson, C.Mcphillie, M.J.Zhou, Y.Woods, S.Afanador, G.A.Rawson, S.Khaliq, F.Prigge, S.T.Roberts, C.W.Rice, D.W.Mcleod, R.Fishwick, C.W.Muench, S.P.

(2014) Bioorg Med Chem Lett 24: 911-916

  • DOI: https://doi.org/10.1016/j.bmcl.2013.12.066
  • Primary Citation of Related Structures:  
    4O1M

  • PubMed Abstract: 

    The enoyl acyl-carrier protein reductase (ENR) enzyme of the apicomplexan parasite family has been intensely studied for antiparasitic drug design for over a decade, with the most potent inhibitors targeting the NAD(+) bound form of the enzyme. However, the higher affinity for the NADH co-factor over NAD(+) and its availability in the natural environment makes the NADH complex form of ENR an attractive target. Herein, we have examined a benzimidazole family of inhibitors which target the NADH form of Francisella ENR, but despite good efficacy against Toxoplasma gondii, the IC50 for T. gondii ENR is poor, with no inhibitory activity at 1 μM. Moreover similar benzimidazole scaffolds are potent against fungi which lack the ENR enzyme and as such we believe that there may be significant off target effects for this family of inhibitors.


  • Organizational Affiliation

    School of Biomedical Sciences, University of Leeds, Leeds, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Enoyl-acyl carrier reductase
A, B, C, D, E
A, B, C, D, E, F
315Toxoplasma gondiiMutation(s): 0 
Gene Names: Enoyl reductaseENRTGVEG_000410
EC: 1.3.1.9
UniProt
Find proteins for Q6UCJ9 (Toxoplasma gondii)
Explore Q6UCJ9 
Go to UniProtKB:  Q6UCJ9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6UCJ9
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.4α = 90
b = 75.57β = 90.1
c = 188.33γ = 90
Software Package:
Software NamePurpose
PROTEUM PLUSdata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2014-02-12
    Changes: Database references
  • Version 1.2: 2014-05-07
    Changes: Other
  • Version 1.3: 2024-03-20
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-04-03
    Changes: Refinement description