Evidence map›Paper›PMID 11497432›Full record

ArticleRNA (New York, N.Y.)2001

Coevolution of group II intron RNA structures with their intron-encoded reverse transcriptases.

N Toor, G Hausner, S Zimmerly

Open access · greenAbstract read
In one paragraph

Article in RNA (New York, N.Y.), 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 130 papers.

0numbers the graph read from it
0cells of the map it votes in
130citing papers in PubMed
4.2field-weighted citation impact, top 5% 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

130 citing papers in PubMed, 278 citations in OpenAlex.

  1. Article
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  6. Computational De Novo Design of Group II Introns Yields Highly Active Ribozymes.Chembiochem : a European journal of chemical biology · 2025
    Article
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  9. Scaffold-enabled high-resolution cryo-EM structure determination of RNA.bioRxiv : the preprint server for biology · 2024
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  11. Review
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  17. Review
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  19. The Mitogenomes ofFrontiers in microbiology · 2021
    Article
  20. Article

70 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

3 authors at 2 institutions in 1 country.

N ToorDepartment of Biological Sciences, University of Calgary, Alberta, Canada.
G Hausner
S Zimmerly
University of Calgary · CAUniversity of Manitoba · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Catalytic RNAs are often regarded as molecular fossils from the RNA World, yet it is usually difficult to get more specific information about their evolution. Here we have investigated the coevolution of group II intron RNA structures with their intron-encoded reverse transcriptases (RTs). Unlike group I introns, there has been no obvious reshuffling between intron RNA structures and ORFs. Of the six classes of intron structures that encode ORFs, three are conventional forms of group II A1, B1, and B2 secondary structures, whereas the remaining classes are bacterial, are possibly associated with the most primitive ORFs, and have unusual features and hybrid features of group IIA and group IIB intron structures. Based on these data, we propose a new model for the evolution of group II introns, designated the retroelement ancestor hypothesis, which predicts that the major RNA structural forms of group II introns developed through coevolution with the intron-encoded protein rather than as independent catalytic RNAs, and that most ORF-less introns are derivatives of ORF-containing introns. The model is supported by the distribution of ORF-containing and ORF-less introns, and by numerous examples of ORF-less introns that contain ORF remnants.

Indexed as

IntronsChloroplastsDatabases, FactualEvolution, MolecularMolecular Sequence DataNucleic Acid ConformationOpen Reading FramesPhylogenyRetroelementsRNARNA, CatalyticRNA-Directed DNA PolymeraseRNA, MitochondrialRetroelementsRNARNA, CatalyticRNA-Directed DNA PolymeraseRNA, Mitochondrial

Identifiers

PMID11497432
PMCPMC1370161
OpenAlexW2117799296

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.