Evidence map›Paper›PMID 32222320›Full record

ArticleMetabolic engineering2020

Systematic identification and elimination of flux bottlenecks in the aldehyde production pathway of Synechococcus elongatus PCC 7942.

Yi Ern Cheah, Yao Xu, Sarah A Sacco, Piyoosh K Babele, Amy O Zheng, Carl Hirschie Johnson, Jamey D Young

Open access · bronzeAbstract read
In one paragraph

Article in Metabolic engineering, 2020. 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
3.2field-weighted citation impact, top 7% 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, 50 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Review
  6. Clocking out and letting go to unleash green biotech applications in a photosynthetic host.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
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  9. Toward bioproduction of oxo chemicals from CBiotechnology for biofuels and bioproducts · 2022
    Review
  10. Review
  11. Review
  12. Article
  13. Frontiers in molecular neuroscience · 2022
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. 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

7 authors at 1 institution in 1 country.

Yi Ern CheahDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA.
Yao XuDepartment of Biological Sciences, Vanderbilt University, Nashville, TN, USA.
Sarah A SaccoDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA.
Piyoosh K BabeleDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA.
Amy O ZhengDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA.
Carl Hirschie JohnsonDepartment of Biological Sciences, Vanderbilt University, Nashville, TN, USA; Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA.
Jamey D YoungDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA. Electronic address: j.d.young@vanderbilt.edu.
Vanderbilt University · US

Funding

Circadian Programs in BacteriaR37GM067152 · NIGMS · VANDERBILT UNIVERSITY · PI JOHNSON, CARL HIRSCHIE · 2015 to 2024
$4.1M
Regulation and Significance of Sustained Circadian OscillationsR01GM107434 · NIGMS · VANDERBILT UNIVERSITY · PI JOHNSON, CARL HIRSCHIE · 2013 to 2024
$4.0M
Circadian Programs in BacteriaR01GM067152 · NIGMS · VANDERBILT UNIVERSITY · PI JOHNSON, CARL HIRSCHIE · 2003 to 2014
$3.9M
Integrated Training in Engineering and DiabetesT32DK101003 · NIDDK · VANDERBILT UNIVERSITY · PI Jamey D. Young · 2014 to 2026
$3.9M
NIDDK NIH HHS T32 DK101003NIGMS NIH HHS R01 GM067152NIGMS NIH HHS R01 GM107434NIGMS NIH HHS R37 GM067152
6 · The paper itself

Abstract

Isotopically nonstationary metabolic flux analysis (INST-MFA) provides a versatile platform to quantitatively assess in vivo metabolic activities of autotrophic systems. By applying INST-MFA to recombinant aldehyde-producing cyanobacteria, we identified metabolic alterations that correlated with increased strain performance in order to guide rational metabolic engineering. We identified four reactions adjacent to the pyruvate node that varied significantly with increasing aldehyde production: pyruvate kinase (PK) and acetolactate synthase (ALS) fluxes were directly correlated with product formation, while pyruvate dehydrogenase (PDH) and phosphoenolpyruvate carboxylase (PPC) fluxes were inversely correlated. Overexpression of enzymes for PK or ALS did not result in further improvements to the previous best-performing strain, while downregulation of PDH expression (through antisense RNA expression) or PPC flux (through expression of the reverse reaction, phosphoenolpyruvate carboxykinase) provided significant improvements. These results illustrate the potential of INST-MFA to enable a systematic approach for iterative identification and removal of pathway bottlenecks in autotrophic host cells.

Indexed as

Acetolactate SynthaseAldehydesAmino AcidsMetabolic EngineeringMetabolic Flux AnalysisPhosphoenolpyruvate CarboxylasePyruvate Dehydrogenase ComplexPyruvate KinasePyruvatesRNA, BacterialSynechococcusAcetolactate SynthaseAldehydesAmino AcidsPhosphoenolpyruvate CarboxylasePyruvate Dehydrogenase ComplexPyruvate KinasePyruvatesRNA, BacterialCyanobacteriaIsobutyraldehydeMetabolic flux analysisPhosphoenolpyruvatePhotoautotrophic metabolismPyruvateStable isotope

Identifiers

PMID32222320
PMCPMC7217728
OpenAlexW3014060420

What OpenQuestion holds

Textmetadata
LicenceTDM
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.