Mus musculus acetylcholinesterase in complex with 2-(4-Biphenylyloxy)-N-[3-(1-piperidinyl)propyl]-acetamide hydrochloride (10)

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

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Ligand Structure Quality Assessment 

This is version 1.2 of the entry. See complete history


Noncovalent Inhibitors of Mosquito Acetylcholinesterase 1 with Resistance-Breaking Potency.

Knutsson, S.Engdahl, C.Kumari, R.Forsgren, N.Lindgren, C.Kindahl, T.Kitur, S.Wachira, L.Kamau, L.Ekstrom, F.Linusson, A.

(2018) J Med Chem 61: 10545-10557

  • DOI: https://doi.org/10.1021/acs.jmedchem.8b01060
  • Primary Citation of Related Structures:  
    6FSD, 6FSE

  • PubMed Abstract: 

    Resistance development in insects significantly threatens the important benefits obtained by insecticide usage in vector control of disease-transmitting insects. Discovery of new chemical entities with insecticidal activity is highly desired in order to develop new insecticide candidates. Here, we present the design, synthesis, and biological evaluation of phenoxyacetamide-based inhibitors of the essential enzyme acetylcholinesterase 1 (AChE1). AChE1 is a validated insecticide target to control mosquito vectors of, e.g., malaria, dengue, and Zika virus infections. The inhibitors combine a mosquito versus human AChE selectivity with a high potency also for the resistance-conferring mutation G122S; two properties that have proven challenging to combine in a single compound. Structure-activity relationship analyses and molecular dynamics simulations of inhibitor-protein complexes have provided insights that elucidate the molecular basis for these properties. We also show that the inhibitors demonstrate in vivo insecticidal activity on disease-transmitting mosquitoes. Our findings support the concept of noncovalent, selective, and resistance-breaking inhibitors of AChE1 as a promising approach for future insecticide development.

  • Organizational Affiliation

    Department of Chemistry , Umeå University , SE-901 82 Umeå , Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
548Mus musculusMutation(s): 0 
Gene Names: Ache
UniProt & NIH Common Fund Data Resources
Find proteins for P21836 (Mus musculus)
Explore P21836 
Go to UniProtKB:  P21836
IMPC:  MGI:87876
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21836
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
E5H (Subject of Investigation/LOI)
Query on E5H

Download Ideal Coordinates CCD File 
C [auth A],
F [auth B]
C22 H28 N2 O2
Query on 1PG

Download Ideal Coordinates CCD File 
C11 H24 O6
Query on TOE

Download Ideal Coordinates CCD File 
C7 H16 O4
Query on PG0

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]
C5 H12 O3
Binding Affinity Annotations 
IDSourceBinding Affinity
E5H BindingDB:  6FSD IC50: 5.70e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.013α = 90
b = 110.327β = 90
c = 227.261γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden2014-4218
Swedish Research CouncilSweden2014-2636

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-31
    Type: Initial release
  • Version 1.1: 2019-04-24
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description