Evidence map›Paper›PMID 22105076›Full record

ArticleThe Journal of biological chemistry2012

The ethylmalonyl-CoA pathway is used in place of the glyoxylate cycle by Methylobacterium extorquens AM1 during growth on acetate.

Kathrin Schneider, Rémi Peyraud, Patrick Kiefer, Philipp Christen, Nathanaël Delmotte, Stéphane Massou, Jean-Charles Portais, Julia A Vorholt

Abstract read
In one paragraph

Article in The Journal of biological chemistry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
–field-weighted citation impact
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

47 citing papers in PubMed.

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  13. Asparagine Uptake: a Cellular Strategy ofApplied and environmental microbiology · 2023
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  14. Comparative Genomic Analysis of aInternational journal of molecular sciences · 2023
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  18. Aerobic Utilization of Methanol for Microbial Growth and Production.Advances in biochemical engineering/biotechnology · 2022
    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

8 authors.

Kathrin SchneiderInstitute of Microbiology, ETH Zurich, 8093 Zurich, Switzerland.
Rémi PeyraudInstitute of Microbiology, ETH Zurich, 8093 Zurich, Switzerland.
Patrick KieferInstitute of Microbiology, ETH Zurich, 8093 Zurich, Switzerland.
Philipp ChristenInstitute of Microbiology, ETH Zurich, 8093 Zurich, Switzerland.
Nathanaël DelmotteInstitute of Microbiology, ETH Zurich, 8093 Zurich, Switzerland.
Stéphane MassouUniversité de Toulouse, Institut National des Sciences Appliquées, Université Paul Sabatier, Institut National Polytechnique de Toulouse, Laboratoire D'Ingénierie des Systèmes Biologiques et des Procédés, F-31077 Toulouse, France; INRA, UMR792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France.
Jean-Charles PortaisUniversité de Toulouse, Institut National des Sciences Appliquées, Université Paul Sabatier, Institut National Polytechnique de Toulouse, Laboratoire D'Ingénierie des Systèmes Biologiques et des Procédés, F-31077 Toulouse, France; INRA, UMR792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France.
Julia A VorholtInstitute of Microbiology, ETH Zurich, 8093 Zurich, Switzerland. Electronic address: vorholt@micro.biol.ethz.ch.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Acetyl-CoA assimilation was extensively studied in organisms harboring the glyoxylate cycle. In this study, we analyzed the metabolism of the facultative methylotroph Methylobacterium extorquens AM1, which lacks isocitrate lyase, the key enzyme in the glyoxylate cycle, during growth on acetate. MS/MS-based proteomic analysis revealed that the protein repertoire of M. extorquens AM1 grown on acetate is similar to that of cells grown on methanol and includes enzymes of the ethylmalonyl-CoA (EMC) pathway that were recently shown to operate during growth on methanol. Dynamic 13C labeling experiments indicate the presence of distinct entry points for acetate: the EMC pathway and the TCA cycle. 13C steady-state metabolic flux analysis showed that oxidation of acetyl-CoA occurs predominantly via the TCA cycle and that assimilation occurs via the EMC pathway. Furthermore, acetyl-CoA condenses with the EMC pathway product glyoxylate, resulting in malate formation. The latter, also formed by the TCA cycle, is converted to phosphoglycerate by a reaction sequence that is reversed with respect to the serine cycle. Thus, the results obtained in this study reveal the utilization of common pathways during the growth of M. extorquens AM1 on C1 and C2 compounds, but with a major redirection of flux within the central metabolism. Furthermore, our results indicate that the metabolic flux distribution is highly complex in this model methylotroph during growth on acetate and is fundamentally different from organisms using the glyoxylate cycle.

Indexed as

Citric Acid CycleAcetatesAcyl Coenzyme AGlyoxylatesKineticsMethylobacterium extorquensProteomicsAcetatesAcyl Coenzyme Aethylmalonyl-coenzyme AGlyoxylatesglyoxylic acid

Identifiers

PMID22105076
PMCPMC3249130

What OpenQuestion holds

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Registered trials

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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.