Evidence map›Paper›PMID 26377568›Full record

ArticleMicrobial cell factories2015

Metabolic engineering of Escherichia coli into a versatile glycosylation platform: production of bio-active quercetin glycosides.

Frederik De Bruyn, Maarten Van Brempt, Jo Maertens, Wouter Van Bellegem, Dries Duchi, Marjan De Mey

Open access · goldAbstract read
In one paragraph

Article in Microbial cell factories, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing 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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 77 citations in OpenAlex.

  1. Pooled it
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  17. Metabolic Engineering ofMicroorganisms · 2022
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  20. Undifferentiated In Vitro CulturedPlants (Basel, Switzerland) · 2021
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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 1 institution in 1 country.

Frederik De BruynDepartment of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure Links 653, 9000, Ghent, Belgium. frederikdebruyn@gmail.com.
Maarten Van BremptDepartment of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure Links 653, 9000, Ghent, Belgium. maarten.vanbrempt@ugent.be.
Jo MaertensDepartment of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure Links 653, 9000, Ghent, Belgium. jo.maertens@ugent.be.
Wouter Van BellegemDepartment of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure Links 653, 9000, Ghent, Belgium. wouter.vanbellegem@ugent.be.
Dries DuchiDepartment of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure Links 653, 9000, Ghent, Belgium. dries.duchi@ugent.be.
Marjan De MeyDepartment of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure Links 653, 9000, Ghent, Belgium. marjan.demey@ugent.be.
Ghent University · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFlavonoids are bio-active specialized plant metabolites which mainly occur as different glycosides. Due to the increasing market demand, various biotechnological approaches have been developed which use Escherichia coli as a microbial catalyst for the stereospecific glycosylation of flavonoids. Despite these efforts, most processes still display low production rates and titers, which render them unsuitable for large-scale applications.

resultsIn this contribution, we expanded a previously developed in vivo glucosylation platform in E. coli W, into an efficient system for selective galactosylation and rhamnosylation. The rational of the novel metabolic engineering strategy constitutes of the introduction of an alternative sucrose metabolism in the form of a sucrose phosphorylase, which cleaves sucrose into fructose and glucose 1-phosphate as precursor for UDP-glucose. To preserve these intermediates for glycosylation purposes, metabolization reactions were knocked-out. Due to the pivotal role of UDP-glucose, overexpression of the interconverting enzymes galE and MUM4 ensured the formation of both UDP-galactose and UDP-rhamnose, respectively. By additionally supplying exogenously fed quercetin and overexpressing a flavonol galactosyltransferase (F3GT) or a rhamnosyltransferase (RhaGT), 0.94 g/L hyperoside (quercetin 3-O-galactoside) and 1.12 g/L quercitrin (quercetin 3-O-rhamnoside) could be produced, respectively. In addition, both strains showed activity towards other promising dietary flavonols like kaempferol, fisetin, morin and myricetin.

conclusionsTwo E. coli W mutants were engineered that could effectively produce the bio-active flavonol glycosides hyperoside and quercitrin starting from the cheap substrates sucrose and quercetin. This novel fermentation-based glycosylation strategy will allow the economically viable production of various glycosides.

Indexed as

Metabolic EngineeringBioreactorsEscherichia coliFermentationFlavonoidsGlycosidesGlycosylationQuercetinSucroseFlavonoidsGlycosidesQuercetinquercitrinSucrose

Identifiers

PMID26377568
PMCPMC4573293
OpenAlexW1947658096

What OpenQuestion holds

Textmetadata
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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.