Evidence map›Paper›PMID 34353908›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

A squalene-hopene cyclase in

Jonna Bouwknegt, Sanne J Wiersma, Raúl A Ortiz-Merino, Eline S R Doornenbal, Petrik Buitenhuis, Martin Giera, Christoph Müller, Jack T Pronk

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. 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
1.7field-weighted citation impact, top 15% 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

17 citing papers in PubMed, 28 citations in OpenAlex.

  1. Article
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  6. Biosynthesis of lanosterol inSynthetic and systems biotechnology · 2025
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  11. Article
  12. Draft genome sequence of theMicrobiology resource announcements · 2024
    Article
  13. Article
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  15. Article
  16. Article
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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

8 authors at 3 institutions in 2 countries.

Jonna BouwknegtDepartment of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands.
Sanne J WiersmaDepartment of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands.ORCID 0000-0002-5295-8363
Raúl A Ortiz-MerinoDepartment of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands.ORCID 0000-0003-4186-8941
Eline S R DoornenbalDepartment of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands.ORCID 0000-0002-2827-0817
Petrik BuitenhuisDepartment of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands.
Martin GieraCenter for Proteomics and Metabolomics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.ORCID 0000-0003-1684-1894
Christoph MüllerDepartment of Pharmacy, Center for Drug Research, Ludwig-Maximillians University Munich, 81377 Munich, Germany.
Jack T PronkDepartment of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands; j.t.pronk@tudelft.nl.ORCID 0000-0002-5617-4611
Delft University of Technology · NLLeiden University Medical Center · NLLudwig-Maximilians-Universität München · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Biosynthesis of sterols, which are key constituents of canonical eukaryotic membranes, requires molecular oxygen. Anaerobic protists and deep-branching anaerobic fungi are the only eukaryotes in which a mechanism for sterol-independent growth has been elucidated. In these organisms, tetrahymanol, formed through oxygen-independent cyclization of squalene by a squalene-tetrahymanol cyclase, acts as a sterol surrogate. This study confirms an early report [C. J. E. A. Bulder,

Indexed as

Adaptation, BiologicalAnaerobiosisBacterial ProteinsCulture MediaErgosterolEukaryotic CellsFatty Acids, UnsaturatedFungal ProteinsGene Expression Regulation, FungalIntramolecular TransferasesSaccharomyces cerevisiaeSchizosaccharomycesSterolsTriterpenesBacterial ProteinsCulture MediadiploptenediplopterolErgosterolFatty Acids, UnsaturatedFungal ProteinsIntramolecular Transferasessqualene-hopene cyclaseSterolsTriterpenesanaerobichopanoidsSchizosaccharomycessterolsyeast

Identifiers

PMID34353908
PMCPMC8364164
OpenAlexW3188013080

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.