Evidence map›Paper›PMID 7993080›Full record

ArticleApplied and environmental microbiology1994

Engineering of Escherichia coli central metabolism for aromatic metabolite production with near theoretical yield.

R Patnaik, J C Liao

Open access · bronzeAbstract read
In one paragraph

Article in Applied and environmental microbiology, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed
2.1field-weighted citation impact, top 13% 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

58 citing papers in PubMed, 206 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. A comprehensive review and comparison of L-tryptophan biosynthesis inFrontiers in bioengineering and biotechnology · 2023
    Review
  5. Production of indigo by recombinant bacteria.Bioresources and bioprocessing · 2023
    Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Review
  14. Review
  15. Metabolic engineering for improving L-tryptophan production in Escherichia coli.Journal of industrial microbiology & biotechnology · 2019
    Review
  16. Article
  17. Article
  18. Engineering and systems-level analysis ofBiotechnology for biofuels · 2018
    Article
  19. Article
  20. Article
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.

R PatnaikDepartment of Chemical Engineering, Texas A&M University, College Station 77843-3122.
J C Liao
Texas A&M University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Escherichia coli and many other microorganisms synthesize aromatic amino acids through the condensation reaction between phosphoenolpyruvate (PEP) and erythrose 4-phosphate to form 3-deoxy-D-arabinoheptulosonate 7-phosphate (DAHP). It has been shown that overexpression of transketolase increases the production of DAHP in an aroB mutant strain (unable to further metabolize DAHP) with elevated DAHP synthase. However, the yield (percent conversion) of DAHP from glucose is still low. Stoichiometric analysis shows that many enzymes compete for intracellular PEP. In particular, the phosphotransferase system, responsible for glucose transport in E. coli, uses PEP as a phosphate donor and converts it to pyruvate, which is less likely to recycle back to PEP. This stoichiometric limitation greatly reduces the yield of aromatic metabolites. To relieve this limitation, we overexpressed PEP synthase in the presence of glucose and showed that it increased the final concentration and the yield of DAHP by almost twofold, to a near theoretical maximum. The PEP synthase effect is not observed without overproduced transketolase, suggesting that erythrose 4-phosphate is the first limiting metabolite. This result demonstrates the utility of pathway analysis and the limitation of central metabolites in the high-level overproduction of desired metabolites.

Indexed as

Culture MediaEscherichia coliGene Expression Regulation, EnzymologicGenetic EngineeringGlucoseMutationPhosphoenolpyruvate CarboxylasePhosphotransferases (Paired Acceptors)Sugar Phosphates3-deoxy-D-arabino-heptulosonate-7-phosphateCulture MediaGlucosePhosphoenolpyruvate CarboxylasePhosphotransferases (Paired Acceptors)pyruvate, water dikinaseSugar Phosphates

Identifiers

PMID7993080
PMCPMC201913
OpenAlexW1585571745

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.