alpha-esterase-7 in complex with 3-chloro-4-[(2-fluorophenyl)methoxy]phenylborinic acid

Experimental Data Snapshot

  • Resolution: 1.65 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

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This is version 1.3 of the entry. See complete history


Overcoming insecticide resistance through computational inhibitor design.

Correy, G.J.Zaidman, D.Harmelin, A.Carvalho, S.Mabbitt, P.D.Calaora, V.James, P.J.Kotze, A.C.Jackson, C.J.London, N.

(2019) Proc Natl Acad Sci U S A 116: 21012-21021

  • DOI: https://doi.org/10.1073/pnas.1909130116
  • Primary Citation of Related Structures:  
    5TYJ, 5TYK, 5TYL, 5TYM, 5TYN, 5TYO, 5TYP

  • PubMed Abstract: 

    Insecticides allow control of agricultural pests and disease vectors and are vital for global food security and health. The evolution of resistance to insecticides, such as organophosphates (OPs), is a serious and growing concern. OP resistance often involves sequestration or hydrolysis of OPs by carboxylesterases. Inhibiting carboxylesterases could, therefore, restore the effectiveness of OPs for which resistance has evolved. Here, we use covalent virtual screening to produce nano-/picomolar boronic acid inhibitors of the carboxylesterase αE7 from the agricultural pest Lucilia cuprina as well as a common Gly137Asp αE7 mutant that confers OP resistance. These inhibitors, with high selectivity against human acetylcholinesterase and low to no toxicity in human cells and in mice, act synergistically with the OPs diazinon and malathion to reduce the amount of OP required to kill L. cuprina by up to 16-fold and abolish resistance. The compounds exhibit broad utility in significantly potentiating another OP, chlorpyrifos, against the common pest, the peach-potato aphid ( Myzus persicae ). These compounds represent a solution to OP resistance as well as to environmental concerns regarding overuse of OPs, allowing significant reduction of use without compromising efficacy.

  • Organizational Affiliation

    Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Carboxylic ester hydrolase577Lucilia cuprinaMutation(s): 6 
Gene Names: LcaE7
EC: 3.1.1
Find proteins for Q25252 (Lucilia cuprina)
Explore Q25252 
Go to UniProtKB:  Q25252
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ25252
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 7N4

Download Ideal Coordinates CCD File 
B [auth A]{3-chloro-4-[(2-fluorophenyl)methoxy]phenyl}borinic acid
C13 H11 B Cl F O2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.65 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.799α = 90
b = 100.792β = 90
c = 221.818γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-06
    Type: Initial release
  • Version 1.1: 2019-10-09
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-13
    Changes: Database references
  • Version 1.3: 2023-10-04
    Changes: Data collection, Database references, Refinement description