Evidence map›Paper›PMID 26376732›Full record

ArticleMicrobial cell factories2015

Optimization of yeast-based production of medicinal protoberberine alkaloids.

Stephanie Galanie, Christina D Smolke

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 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
5.6field-weighted citation impact, top 4% 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, 71 citations in OpenAlex.

  1. Article
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  6. Article
  7. Current topics in medicinal chemistry · 2024
    Review
  8. Review
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  11. Article
  12. Article
  13. Catalytic promiscuity ofHorticulture research · 2022
    Article
  14. Complete biosynthesis of the bisbenzylisoquinoline alkaloids guattegaumerine and berbamunine in yeast.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  15. Article
  16. EngineeringaBIOTECH · 2021
    Review
  17. Review
  18. Review
  19. Complete biosynthesis of noscapine and halogenated alkaloids in yeast.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  20. Green Routes for the Production of Enantiopure Benzylisoquinoline Alkaloids.International journal of molecular sciences · 2017
    Review
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

2 authors at 1 institution in 1 country.

Stephanie GalanieDepartment of Chemistry, Stanford University, 443 Via Ortega, MC 4245, Stanford, CA, 94305, USA. sgalanie@stanford.edu.
Christina D SmolkeDepartment of Bioengineering, Stanford University, 443 Via Ortega, MC 4245, Stanford, CA, 94305, USA. csmolke@stanford.edu.
Stanford University · US

Funding

Synthetic Biology Platforms for Natural Product Discovery and BiosynthesisDP1AT007886 · NCCIH · STANFORD UNIVERSITY · PI SMOLKE, CHRISTINA D · 2012 to 2016
$3.9M
NCCIH NIH HHS AT007886NCCIH NIH HHS DP1 AT007886
6 · The paper itself

Abstract

backgroundProtoberberine alkaloids are bioactive molecules abundant in plant preparations for traditional medicines. Yeast engineered to express biosynthetic pathways for fermentative production of these compounds will further enable investigation of the medicinal properties of these molecules and development of alkaloid-based drugs with improved efficacy and safety. Here, we describe the optimization of a biosynthetic pathway in Saccharomyces cerevisiae for conversion of rac-norlaudanosoline to the protoberberine alkaloid (S)-canadine.

resultsThis yeast strain is engineered to express seven heterologous enzymes, resulting in protoberberine alkaloid production from a simple benzylisoquinoline alkaloid precursor. The seven enzymes include three membrane-bound enzymes: the flavin-dependent oxidase berberine bridge enzyme, the cytochrome P450 canadine synthase, and a cytochrome P450 reductase. A number of strategies were implemented to improve flux through the pathway, including enzyme variant screening, genetic copy number variation, and culture optimization, that led to an over 70-fold increase in canadine titer up to 1.8 mg/L. Increased canadine titers enable extension of the pathway to produce berberine, a major constituent of several traditional medicines, for the first time in a microbial host. We also demonstrate that this strain is viable at pilot scale.

conclusionsBy applying metabolic engineering and synthetic biology strategies for increased conversion of simple benzylisoquinoline alkaloids to complex protoberberine alkaloids, this work will facilitate chemoenzymatic synthesis or de novo biosynthesis of these and other high-value compounds using a microbial cell factory.

Indexed as

Batch Cell Culture TechniquesBerberineBerberine AlkaloidsBioreactorsBiosynthetic PathwaysCytochrome P-450 Enzyme SystemFermentationGene DosageMetabolic EngineeringPilot ProjectsSaccharomyces cerevisiaeTetrahydropapaverolineBerberineBerberine AlkaloidscanadineCytochrome P-450 Enzyme SystemprotoberberineTetrahydropapaveroline

Identifiers

PMID26376732
PMCPMC4574094
OpenAlexW1866993088

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.