Evidence map›Paper›PMID 29967474›Full record

ArticleScientific reports2018

Catalysis of amorpha-4,11-diene synthase unraveled and improved by mutability landscape guided engineering.

Ingy I Abdallah, Ronald van Merkerk, Esmée Klumpenaar, Wim J Quax

Abstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–field-weighted citation impact
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

17 citing papers in PubMed.

  1. Review
  2. Review
  3. Characterization of the Cubamyces Menziesii Terpenome.Chembiochem : a European journal of chemical biology · 2025
    Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Making Enzymes Suitable for Organic Chemistry by Rational Protein Design.Chembiochem : a European journal of chemical biology · 2022
    Review
  9. Review
  10. Review
  11. Article
  12. Positioning Bacillus subtilis as terpenoid cell factory.Journal of applied microbiology · 2021
    Review
  13. Engineering of Multiple Modules to Improve Amorphadiene Production inJournal of agricultural and food chemistry · 2021
    Article
  14. Review
  15. Review
  16. Article
  17. Review
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

4 authors.

Ingy I AbdallahDepartment of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV, Groningen, The Netherlands.
Ronald van MerkerkDepartment of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV, Groningen, The Netherlands.
Esmée KlumpenaarDepartment of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV, Groningen, The Netherlands.
Wim J QuaxDepartment of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV, Groningen, The Netherlands. w.j.quax@rug.nl.ORCID 0000-0002-5162-9947

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Amorpha-4,11-diene synthase (ADS) cyclizes the substrate farnesyl pyrophosphate to produce amorpha-4,11-diene as a major product. This is considered the first committed and rate-limiting step in the biosynthesis of the antimalarial artemisinin. Here, we utilize a reported 3D model of ADS to perform mutability landscape guided enzyme engineering. A mutant library of 258 variants along sixteen active site residues was created then screened for catalytic activity and product profile. This allowed for identification of the role of some of these residues in the mechanism. R262 constrains the released pyrophosphate group along with magnesium ions. The aromatic residues (W271, Y519 and F525) stabilize the intermediate carbocations while T296, G400, G439 and L515 help with the 1,6- and 1,10-ring closures. Finally, W271 is suggested to act as active site base along with T399, which ensures regioselective deprotonation. The mutability landscape also helped determine variants with improved catalytic activity. H448A showed ~4 fold increase in catalytic efficiency and the double mutation T399S/H448A improved k

Indexed as

Alkyl and Aryl TransferasesCatalysisCatalytic DomainDiphosphatesEscherichia coliGas Chromatography-Mass SpectrometryMutagenesis, Site-DirectedPeptide LibraryPolycyclic SesquiterpenesProtein EngineeringRecombinant ProteinsSesquiterpenesAlkyl and Aryl Transferasesamorpha-4,11-dieneamorpha-4,11-diene synthaseDiphosphatesdiphosphoric acidPeptide LibraryPolycyclic SesquiterpenesRecombinant ProteinsSesquiterpenes

Identifiers

PMID29967474
PMCPMC6028579

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Registered trials

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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.