Evidence map›Paper›PMID 26359402›Full record

ArticleScience (New York, N.Y.)2015

Six enzymes from mayapple that complete the biosynthetic pathway to the etoposide aglycone.

Warren Lau, Elizabeth S Sattely

Open access · bronzeAbstract read
In one paragraph

Article in Science (New York, N.Y.), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 192 papers.

0numbers the graph read from it
0cells of the map it votes in
192citing papers in PubMed
11.9field-weighted citation impact, top 1% 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

192 citing papers in PubMed, 472 citations in OpenAlex.

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  12. A dual role ofScience advances · 2026
    Article
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  19. Integrated biosynthesis of the lignan (-)-pluviatolide in resting and growingFrontiers in bioengineering and biotechnology · 2026
    Article
  20. Metabolic engineering inaBIOTECH · 2025
    Review

132 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Warren LauDepartment of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.
Elizabeth S SattelyDepartment of Chemical Engineering, Stanford University, Stanford, CA 94305, USA. sattely@stanford.edu.
Stanford University · US

Funding

Liberation of Plant Nutrients by the Gut MicrobiotaDP2AT008321 · NCCIH · STANFORD UNIVERSITY · PI SATTELY, ELIZABETH SUSAN · 2013 to 2013
$2.4M
Biosynthesis of Indolic Phytoalexins: Mechanisms of Plant Innate Immune ResponseR00GM089985 · NIGMS · STANFORD UNIVERSITY · PI SATTELY, ELIZABETH SUSAN · 2011 to 2013
$738k
NCCIH NIH HHS DP2 AT008321NIGMS NIH HHS R00 GM089985
6 · The paper itself

Abstract

Podophyllotoxin is the natural product precursor of the chemotherapeutic etoposide, yet only part of its biosynthetic pathway is known. We used transcriptome mining in Podophyllum hexandrum (mayapple) to identify biosynthetic genes in the podophyllotoxin pathway. We selected 29 candidate genes to combinatorially express in Nicotiana benthamiana (tobacco) and identified six pathway enzymes, including an oxoglutarate-dependent dioxygenase that closes the core cyclohexane ring of the aryltetralin scaffold. By coexpressing 10 genes in tobacco-these 6 plus 4 previously discovered-we reconstitute the pathway to (-)-4'-desmethylepipodophyllotoxin (the etoposide aglycone), a naturally occurring lignan that is the immediate precursor of etoposide and, unlike podophyllotoxin, a potent topoisomerase inhibitor. Our results enable production of the etoposide aglycone in tobacco and circumvent the need for cultivation of mayapple and semisynthetic epimerization and demethylation of podophyllotoxin.

Indexed as

Genetic EngineeringAmino Acid SequenceBiosynthetic PathwaysEtoposideGene Expression Regulation, EnzymologicGene Expression Regulation, PlantMethylationMixed Function OxygenasesMolecular Sequence DataNicotianaPodophyllotoxinPodophyllum peltatumTopoisomerase InhibitorsTranscriptomeEtoposideMixed Function OxygenasesPodophyllotoxinTopoisomerase Inhibitors

Identifiers

PMID26359402
PMCPMC6861171
OpenAlexW1830282417

What OpenQuestion holds

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LicenceTDM
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.