Evidence map›Paper›PMID 11842164›Full record

ArticlePlant physiology2002

Transgenic production of epoxy fatty acids by expression of a cytochrome P450 enzyme from Euphorbia lagascae seed.

Edgar B Cahoon, Kevin G Ripp, Sarah E Hall, Brian McGonigle

Open access · bronzeAbstract read
In one paragraph

Article in Plant physiology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 12% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 119 citations in OpenAlex.

  1. Pooled it
  2. Studying the molecular mechanisms of tef (Journal of functional foods · 2025
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  3. Review
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  5. Oxidative Stability of Vegetal Oil-Based Lubricants.ACS sustainable chemistry & engineering · 2021
    Review
  6. Metabolic Engineering a Model OilseedFrontiers in plant science · 2020
    Review
  7. Article
  8. Seeds as oil factories.Plant reproduction · 2018
    Review
  9. P450s controlling metabolic bifurcations in plant terpene specialized metabolism.Phytochemistry reviews : proceedings of the Phytochemical Society of Europe · 2018
    Article
  10. Article
  11. Article
  12. Oxidation and cyclization of casbene in the biosynthesis of Euphorbia factors from mature seeds of Euphorbia lathyris L.Proceedings of the National Academy of Sciences of the United States of America · 2016
    Article
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  14. 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

4 authors at 2 institutions in 1 country.

Edgar B CahoonDuPont Crop Genetics, Experimental Station, Wilmington, DE 19880-0402, USA. Edgar.B.Cahoon@usa.dupont.com
Kevin G Ripp
Sarah E Hall
Brian McGonigle
DuPont (United States) · USWilmington University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Seed oils of a number of Asteraceae and Euphorbiaceae species are enriched in 12-epoxyoctadeca-cis-9-enoic acid (vernolic acid), an unusual 18-carbon Delta(12)-epoxy fatty acid with potential industrial value. It has been previously demonstrated that the epoxy group of vernolic acid is synthesized by the activity of a Delta(12)-oleic acid desaturase-like enzyme in seeds of the Asteraceae Crepis palaestina and Vernonia galamensis. In contrast, results from metabolic studies have suggested the involvement of a cytochrome P450 enzyme in vernolic acid synthesis in seeds of the Euphorbiaceae species Euphorbia lagascae. To clarify the biosynthetic origin of vernolic acid in E. lagascae seed, an expressed sequence tag analysis was conducted. Among 1,006 randomly sequenced cDNAs from developing E. lagascae seeds, two identical expressed sequence tags were identified that encode a cytochrome P450 enzyme classified as CYP726A1. Consistent with the seed-specific occurrence of vernolic acid in E. lagascae, mRNA corresponding to the CYP726A1 gene was abundant in developing seeds, but was not detected in leaves. In addition, expression of the E. lagascae CYP726A1 cDNA in Saccharomyces cerevisiae was accompanied by production of vernolic acid in cultures supplied with linoleic acid and an epoxy fatty acid tentatively identified as 12-epoxyoctadeca-9,15-dienoic acid (12-epoxy-18:2Delta(9,15)) in cultures supplied with alpha-linolenic acid. Consistent with this, expression of CYP726A1 in transgenic tobacco (Nicotiana tabacum) callus or somatic soybean (Glycine max) embryos resulted in the accumulation of vernolic acid and 12-epoxy-18:2Delta(9,15). Overall, these results conclusively demonstrate that Asteraceae species and the Euphorbiaceae E. lagascae have evolved structurally unrelated enzymes to generate the Delta(12)-epoxy group of vernolic acid.

Indexed as

alpha-Linolenic AcidAmino Acid SequenceBlotting, NorthernCulture TechniquesCytochrome P-450 Enzyme SystemDNA, ComplementaryEpoxy CompoundsEuphorbiaFatty Acids, UnsaturatedGene Expression Regulation, EnzymologicGlycine maxLinoleic AcidMolecular Sequence DataNicotianaOleic AcidsPhylogenyalpha-Linolenic AcidCytochrome P-450 Enzyme SystemDNA, ComplementaryEpoxy CompoundsFatty Acids, UnsaturatedLinoleic AcidOleic Acidsvernolic acid

Identifiers

PMID11842164
PMCPMC148923
OpenAlexW2099985830

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.