Evidence map›Paper›PMID 22661206›Full record

ReviewJournal of Zhejiang University. Science. B2012

Role of vitamin B12 on methylmalonyl-CoA mutase activity.

Tóshiko Takahashi-Iñiguez, Enrique García-Hernandez, Roberto Arreguín-Espinosa, María Elena Flores

Open access · bronzeAbstract readReview
In one paragraph

Review in Journal of Zhejiang University. Science. B, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing 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

59 citing papers in PubMed, 123 citations in OpenAlex.

  1. Trial
  2. Nutrients · 2020
    Trial
  3. Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. International journal of systematic and evolutionary microbiology · 2026
    Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. Article
  14. The effect of parenteral vitamin BScientific reports · 2025
    Article
  15. Article
  16. Lettuce fortification through vitamin BJournal of the science of food and agriculture · 2025
    Article
  17. Article
  18. 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

4 authors at 1 institution in 1 country.

Tóshiko Takahashi-IñiguezDepartment of Molecular Biology and Biotechnology, Institute of Biomedical Research, National Autonomous University of Mexico, D.F. 04510, Mexico. toshikoti@biomedicas.unam.mx
Enrique García-Hernandez
Roberto Arreguín-Espinosa
María Elena Flores
Universidad Nacional Autónoma de México · MX

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vitamin B(12) is an organometallic compound with important metabolic derivatives that act as cofactors of certain enzymes, which have been grouped into three subfamilies depending on their cofactors. Among them, methylmalonyl-CoA mutase (MCM) has been extensively studied. This enzyme catalyzes the reversible isomerization of L-methylmalonyl-CoA to succinyl-CoA using adenosylcobalamin (AdoCbl) as a cofactor participating in the generation of radicals that allow isomerization of the substrate. The crystal structure of MCM determined in Propionibacterium freudenreichii var. shermanii has helped to elucidate the role of this cofactor AdoCbl in the reaction to specify the mechanism by which radicals are generated from the coenzyme and to clarify the interactions between the enzyme, coenzyme, and substrate. The existence of human methylmalonic acidemia (MMA) due to the presence of mutations in MCM shows the importance of its role in metabolism. The recent crystallization of the human MCM has shown that despite being similar to the bacterial protein, there are significant differences in the structural organization of the two proteins. Recent studies have identified the involvement of an accessory protein called MMAA, which interacts with MCM to prevent MCM's inactivation or acts as a chaperone to promote regeneration of inactivated enzyme. The interdisciplinary studies using this protein as a model in different organisms have helped to elucidate the mechanism of action of this isomerase, the impact of mutations at a functional level and their repercussion in the development and progression of MMA in humans. It is still necessary to study the mechanisms involved in more detail using new methods.

Indexed as

Amino Acid Metabolism, Inborn ErrorsAnimalsBacterial ProteinsCobamidesHumansMammalsMethylmalonyl-CoA MutaseMutant ProteinsMutationPropionibacteriumVitamin B 12Bacterial ProteinscobamamideCobamidesMethylmalonyl-CoA MutaseMutant ProteinsVitamin B 12

Identifiers

PMID22661206
PMCPMC3370288
OpenAlexW2012323710

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.