Evidence map›Paper›PMID 23133596›Full record

ArticlePloS one2012

Metabolite profiling identified methylerythritol cyclodiphosphate efflux as a limiting step in microbial isoprenoid production.

Kang Zhou, Ruiyang Zou, Gregory Stephanopoulos, Heng-Phon Too

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
3.5field-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

39 citing papers in PubMed, 105 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Review
  5. Systematic metabolic engineering ofFrontiers in bioengineering and biotechnology · 2024
    Article
  6. Article
  7. Production of Coenzyme QWorld journal of microbiology & biotechnology · 2022
    Review
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Article
  14. Modular engineering for microbial production of carotenoids.Metabolic engineering communications · 2020
    Review
  15. Article
  16. Review
  17. Article
  18. Review
  19. Two-step pathway for isoprenoid synthesis.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  20. 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

4 authors at 1 institution in 2 countries.

Kang ZhouChemical and Pharmaceutical Engineering, Singapore-MIT Alliance, Singapore.
Ruiyang Zou
Gregory Stephanopoulos
Heng-Phon Too
Singapore-MIT Alliance for Research and Technology · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Isoprenoids are natural products that are all derived from isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). These precursors are synthesized either by the mevalonate (MVA) pathway or the 1-Deoxy-D-Xylulose 5-Phosphate (DXP) pathway. Metabolic engineering of microbes has enabled overproduction of various isoprenoid products from the DXP pathway including lycopene, artemisinic acid, taxadiene and levopimaradiene. To date, there is no method to accurately measure all the DXP metabolic intermediates simultaneously so as to enable the identification of potential flux limiting steps. In this study, a solid phase extraction coupled with ultra performance liquid chromatography mass spectrometry (SPE UPLC-MS) method was developed. This method was used to measure the DXP intermediates in genetically engineered E. coli. Unexpectedly, methylerythritol cyclodiphosphate (MEC) was found to efflux when certain enzymes of the pathway were over-expressed, demonstrating the existence of a novel competing pathway branch in the DXP metabolism. Guided by these findings, ispG was overexpressed and was found to effectively reduce the efflux of MEC inside the cells, resulting in a significant increase in downstream isoprenoid production. This study demonstrated the necessity to quantify metabolites enabling the identification of a hitherto unrecognized pathway and provided useful insights into rational design in metabolic engineering.

Indexed as

CarotenoidsChemistry, PharmaceuticalErythritolEscherichia coliFosfomycinGas Chromatography-Mass SpectrometryGenetic EngineeringLycopeneMass SpectrometryMetabolic EngineeringMevalonic AcidModels, BiologicalModels, ChemicalPlasmidsTerpenesCarotenoidsErythritolFosfomycinfosmidomycinLycopenemethyl-D-erythritol 2,4-cyclodiphosphateMevalonic AcidTerpenes

Identifiers

PMID23133596
PMCPMC3487848
OpenAlexW2164166797

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.