Evidence map›Paper›PMID 26884604›Full record

ArticleJournal of experimental botany2016

Formation of β-glucogallin, the precursor of ellagic acid in strawberry and raspberry.

Katja Schulenburg, Antje Feller, Thomas Hoffmann, Johannes H Schecker, Stefan Martens, Wilfried Schwab

Open access · bronzeAbstract read
In one paragraph

Article in Journal of experimental botany, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.6field-weighted citation impact, top 11% 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

19 citing papers in PubMed, 58 citations in OpenAlex.

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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

6 authors at 2 institutions in 2 countries.

Katja SchulenburgBiotechnology of Natural Products, Technische Univeristät München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany.
Antje FellerDepartment of Food Quality and Nutrition, IASMA Research and Innovation Center, Fondazione Edmund Mach (FEM), Via E. Mach 1, 38010 San Michele all'Adige, (TN), Italy.
Thomas HoffmannBiotechnology of Natural Products, Technische Univeristät München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany.
Johannes H ScheckerBiotechnology of Natural Products, Technische Univeristät München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany.
Stefan MartensDepartment of Food Quality and Nutrition, IASMA Research and Innovation Center, Fondazione Edmund Mach (FEM), Via E. Mach 1, 38010 San Michele all'Adige, (TN), Italy.
Wilfried SchwabBiotechnology of Natural Products, Technische Univeristät München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany Wilfried.Schwab@tum.de.ORCID http://orcid.org/0000-0002-9753-3967
Technical University of Munich · DEFondazione Edmund Mach · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ellagic acid/ellagitannins are plant polyphenolic antioxidants that are synthesized from gallic acid and have been associated with a reduced risk of cancer and cardiovascular diseases. Here, we report the identification and characterization of five glycosyltransferases (GTs) from two genera of the Rosaceae family (Fragaria and Rubus; F. × ananassa FaGT2*, FaGT2, FaGT5, F. vesca FvGT2, and R. idaeus RiGT2) that catalyze the formation of 1-O-galloyl-β-D-glucopyranose (β-glucogallin) the precursor of ellagitannin biosynthesis. The enzymes showed substrate promiscuity as they formed glucose esters of a variety of (hydroxyl)benzoic and (hydroxyl)cinnamic acids. Determination of kinetic values and site-directed mutagenesis revealed amino acids that affected substrate preference and catalytic activity. Green immature strawberry fruits were identified as the main source of gallic acid, β-glucogallin, and ellagic acid in accordance with the highest GT2 gene expression levels. Injection of isotopically labeled gallic acid into green fruits of stable transgenic antisense FaGT2 strawberry plants clearly confirmed the in planta function. Our results indicate that GT2 enzymes might contribute to the production of ellagic acid/ellagitannins in strawberry and raspberry, and are useful to develop strawberry fruit with additional health benefits and for the biotechnological production of bioactive polyphenols.

Indexed as

Amino Acid SequenceEllagic AcidFragariaGlycosyltransferasesHydrolyzable TanninsKineticsMetabolomicsMutagenesis, Site-DirectedPlant ProteinsRubusSequence Homology, Amino AcidUridine Diphosphate GlucoseEllagic AcidglucogallinGlycosyltransferasesHydrolyzable TanninsPlant ProteinsUridine Diphosphate GlucoseEllagic acidellagitanninFragariaglucose esterglycosyltransferaseRubus.β-glucogallin

Identifiers

PMID26884604
PMCPMC4809288
OpenAlexW2284495841

What OpenQuestion holds

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LicenceCC BY
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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.