Evidence map›Paper›PMID 9207114›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1997

A single amino acid substitution converts a carboxylesterase to an organophosphorus hydrolase and confers insecticide resistance on a blowfly.

R D Newcomb, P M Campbell, D L Ollis, E Cheah, R J Russell, J G Oakeshott

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed
4.7field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

75 citing papers in PubMed, 382 citations in OpenAlex.

  1. Structural and evolutionary constraints of organophosphate resistance in dipteran carboxylesterases.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Single Amino Acid Polymorphisms in thePathogens (Basel, Switzerland) · 2023
    Article
  3. Review
  4. Article
  5. Article
  6. Pathogenicity ofInsects · 2022
    Article
  7. Genomic analysis of the carboxylesterase family in the salmon louse (Lepeophtheirus salmonis).Comparative biochemistry and physiology. Toxicology & pharmacology : CBP · 2021
    Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Overcoming insecticide resistance through computational inhibitor design.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  15. Article
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15 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

R D NewcombCommonwealth Scientific and Industrial Research Organisation, Division of Entomology, G.P.O. Box 1700, Canberra, Australian Capital Territory 2601, Australia. rnewcomb@hort.cri.nz
P M Campbell
D L Ollis
E Cheah
R J Russell
J G Oakeshott
Commonwealth Scientific and Industrial Research Organisation · AUAustralian National University · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Resistance to organophosphorus (OP) insecticides is associated with decreased carboxylesterase activity in several insect species. It has been proposed that the resistance may be the result of a mutation in a carboxylesterase that simultaneously reduces its carboxylesterase activity and confers an OP hydrolase activity (the "mutant ali-esterase hypothesis"). In the sheep blowfly, Lucilia cuprina, the association is due to a change in a specific esterase isozyme, E3, which, in resistant flies, has a null phenotype on gels stained using standard carboxylesterase substrates. Here we show that an OP-resistant allele of the gene that encodes E3 differs at five amino acid replacement sites from a previously described OP-susceptible allele. Knowledge of the structure of a related enzyme (acetylcholinesterase) suggests that one of these substitutions (Gly137 --> Asp) lies within the active site of the enzyme. The occurrence of this substitution is completely correlated with resistance across 15 isogenic strains. In vitro expression of two natural and two synthetic chimeric alleles shows that the Asp137 substitution alone is responsible for both the loss of E3's carboxylesterase activity and the acquisition of a novel OP hydrolase activity. Modeling of Asp137 in the homologous position in acetylcholinesterase suggests that Asp137 may act as a base to orientate a water molecule in the appropriate position for hydrolysis of the phosphorylated enzyme intermediate.

Indexed as

AllelesAmino AcidsAnimalsAryldialkylphosphataseCarboxylesteraseCarboxylic Ester HydrolasesDipteraEsterasesInsecticide ResistancePoint MutationAmino AcidsAryldialkylphosphataseCarboxylesteraseCarboxylic Ester HydrolasesEsterases

Identifiers

PMID9207114
PMCPMC23844
OpenAlexW2049489115

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.