Evidence map›Paper›PMID 21512819›Full record

ArticleJournal of industrial microbiology & biotechnology2011

Metabolic engineering of Escherichia coli for improving L-3,4-dihydroxyphenylalanine (L-DOPA) synthesis from glucose.

Ana Joyce Muñoz, Georgina Hernández-Chávez, Ramon de Anda, Alfredo Martínez, Francisco Bolívar, Guillermo Gosset

Open access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in Journal of industrial microbiology & biotechnology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
4.3field-weighted citation impact, top 6% 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

34 citing papers in PubMed, 76 citations in OpenAlex.

  1. Article
  2. Efficient synthesis of l-DOPA inSynthetic and systems biotechnology · 2026
    Article
  3. Review
  4. Article
  5. Engineering non-P450 3-hydroxylase forSynthetic and systems biotechnology · 2025
    Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Metabolic engineering for improving L-tryptophan production in Escherichia coli.Journal of industrial microbiology & biotechnology · 2019
    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

6 authors at 1 institution in 1 country.

Ana Joyce MuñozDepartamento de Ingenierıa Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, 62210 Cuernavaca, Morelos, Mexico.
Georgina Hernández-Chávez
Ramon de Anda
Alfredo Martínez
Francisco Bolívar
Guillermo Gosset
Universidad Nacional Autónoma de México · MX

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

L-3,4-dihydroxyphenylalanine (L-DOPA) is an aromatic compound employed for the treatment of Parkinson's disease. Metabolic engineering was applied to generate Escherichia coli strains for the production of L-DOPA from glucose by modifying the phosphoenolpyruvate:sugar phosphotransferase system (PTS) and aromatic biosynthetic pathways. Carbon flow was directed to the biosynthesis of L-tyrosine (L-Tyr), an L-DOPA precursor, by transforming strains with compatible plasmids carrying genes encoding a feedback-inhibition resistant version of 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase, transketolase, the chorismate mutase domain from chorismate mutase-prephenate dehydratase from E. coli and cyclohexadienyl dehydrogenase from Zymomonas mobilis. The effects on L-Tyr production of PTS inactivation (PTS(-) gluc(+) phenotype), as well as inactivation of the regulatory protein TyrR, were evaluated. PTS inactivation caused a threefold increase in the specific rate of L-Tyr production (q( L-Tyr)), whereas inactivation of TyrR caused 1.7- and 1.9-fold increases in q( L-Tyr) in the PTS(+) and the PTS(-) gluc(+) strains, respectively. An 8.6-fold increase in L-Tyr yield from glucose was observed in the PTS(-) gluc(+) tyrR (-) strain. Expression of hpaBC genes encoding the enzyme 4-hydroxyphenylacetate 3-hydroxylase from E. coli W in the strains modified for L-Tyr production caused the synthesis of L-DOPA. One of such strains, having the PTS(-) gluc(+) tyrR (-) phenotype, displayed the best production parameters in minimal medium, with a specific rate of L-DOPA production of 13.6 mg/g/h, L-DOPA yield from glucose of 51.7 mg/g and a final L-DOPA titer of 320 mg/l. In a batch fermentor culture in rich medium this strain produced 1.51 g/l of L-DOPA in 50 h.

Indexed as

3-Deoxy-7-Phosphoheptulonate SynthaseChorismate MutaseEscherichia coliGlucoseLevodopaMetabolic EngineeringMixed Function OxygenasesPhosphoenolpyruvate Sugar Phosphotransferase SystemPlasmidsPrephenate DehydratasePrephenate DehydrogenaseTransketolaseTyrosineZymomonas3-Deoxy-7-Phosphoheptulonate SynthaseChorismate Mutasecyclohexadienyl dehydrogenaseGlucoseLevodopaMixed Function OxygenasesPhosphoenolpyruvate Sugar Phosphotransferase SystemPrephenate DehydratasePrephenate DehydrogenaseTransketolaseTyrosine

Identifiers

PMID21512819
OpenAlexW1963861426

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.