Evidence map›Paper›PMID 19208647›Full record

ReviewNucleic acids research2009

Phylogenomics of DNA topoisomerases: their origin and putative roles in the emergence of modern organisms.

Patrick Forterre, Danièle Gadelle

Open access · goldAbstract readReview
In one paragraph

Review in Nucleic acids research, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 109 papers.

0numbers the graph read from it
0cells of the map it votes in
109citing papers in PubMed
11.6field-weighted citation impact, top 1% 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

109 citing papers in PubMed, 181 citations in OpenAlex.

  1. Article
  2. Article
  3. The Roles of Topoisomerases in Transcriptional Regulation.International journal of molecular sciences · 2026
    Review
  4. Mechanistic basis for relaxation of DNA supercoils by human topoisomerase IIIα-RMI1-RMI2.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  5. Current aging science · 2026
    Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Review
  11. Bacterial Topoisomerase I Growth Complementation Assay.Methods in molecular biology (Clifton, N.J.) · 2025
    Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Review

49 more citing papers are in PubMed but not listed here.

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.

Patrick ForterreInstitut de Génétique et Microbiologie, Univ Paris-Sud, 91405 Orsay Cedex, France.
Danièle Gadelle
Université Paris-Sud · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Topoisomerases are essential enzymes that solve topological problems arising from the double-helical structure of DNA. As a consequence, one should have naively expected to find homologous topoisomerases in all cellular organisms, dating back to their last common ancestor. However, as observed for other enzymes working with DNA, this is not the case. Phylogenomics analyses indicate that different sets of topoisomerases were present in the most recent common ancestors of each of the three cellular domains of life (some of them being common to two or three domains), whereas other topoisomerases families or subfamilies were acquired in a particular domain, or even a particular lineage, by horizontal gene transfers. Interestingly, two groups of viruses encode topoisomerases that are only distantly related to their cellular counterparts. To explain these observations, we suggest that topoisomerases originated in an ancestral virosphere, and that various subfamilies were later on transferred independently to different ancient cellular lineages. We also proposed that topoisomerases have played a critical role in the origin of modern genomes and in the emergence of the three cellular domains.

Indexed as

Evolution, MolecularDNA TopoisomerasesDNA Topoisomerases, Type IDNA Topoisomerases, Type IIGenomicsPhylogenyVirusesDNA TopoisomerasesDNA Topoisomerases, Type IDNA Topoisomerases, Type II

Identifiers

PMID19208647
PMCPMC2647321
OpenAlexW2070231128

What OpenQuestion holds

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LicenceCC BY-NC
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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.