Evidence map›Paper›PMID 7490770›Full record

ArticleJournal of molecular evolution1995

Fungal origin by horizontal transfer of a plant mitochondrial group I intron in the chimeric CoxI gene of Peperomia.

J C Vaughn, M T Mason, G L Sper-Whitis, P Kuhlman, J D Palmer

Abstract read
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In one paragraph

Article in Journal of molecular evolution, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

62 citing papers in PubMed, 131 citations in OpenAlex.

  1. Horizontal Gene Transfer in Plants and Implications for Biotechnology.Plant-environment interactions (Hoboken, N.J.) · 2025
    Review
  2. Article
  3. Comparative mitogenomic analysis ofFrontiers in physiology · 2024
    Article
  4. Article
  5. Article
  6. Frontiers in microbiology · 2023
    Article
  7. Article
  8. Horizontal Gene Transfers in Plants.Life (Basel, Switzerland) · 2021
    Review
  9. Review
  10. The Complete Mitogenome ofFrontiers in plant science · 2021
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

2 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

5 authors at 2 institutions in 1 country.

J C VaughnDepartment of Zoology, Miami University, Oxford, OH 45056, USA.
M T Mason
G L Sper-Whitis
P Kuhlman
J D Palmer
Miami University · USIndiana University Bloomington · US

Funding

TRANSFER OF ORGANELLE GENES TO THE NUCLEUSR01GM035087 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI PALMER, JEFFREY D · 1985 to 2004
$1.8M
NIGMS NIH HHS GM-35087
6 · The paper itself

Abstract

We present phylogenetic evidence that a group I intron in an angiosperm mitochondrial gene arose recently by horizontal transfer from a fungal donor species. A 1,716-bp fragment of the mitochondrial coxI gene from the angiosperm Peperomia polybotrya was amplified via the polymerase chain reaction and sequenced. Comparison to other coxI genes revealed a 966-bp group I intron, which, based on homology with the related yeast coxI intron aI4, potentially encodes a 279-amino-acid site-specific DNA endonuclease. This intron, which is believed to function as a ribozyme during its own splicing, is not present in any of 19 coxI genes examined from other diverse vascular plant species. Phylogenetic analysis of intron origin was carried out using three different tree-generating algorithms, and on a variety of nucleotide and amino acid data sets from the intron and its flanking exon sequences. These analyses show that the Peperomia coxI gene intron and exon sequences are of fundamentally different evolutionary origin. The Peperomia intron is more closely related to several fungal mitochondrial introns, two of which are located at identical positions in coxI, than to identically located coxI introns from the land plant Marchantia and the green alga Prototheca. Conversely, the exon sequence of this gene is, as expected, most closely related to other angiosperm coxI genes. These results, together with evidence suggestive of co-conversion of exonic markers immediately flanking the intron insertion site, lead us to conclude that the Peperomia coxI intron probably arose by horizontal transfer from a fungal donor, using the double-strand-break repair pathway. The donor species may have been one of the symbiotic mycorrhizal fungi that live in close obligate association with most plants.

Indexed as

Gene Transfer, HorizontalIntronsAmino Acid SequenceBase SequenceElectron Transport Complex IVEvolution, MolecularFungiGenes, PlantMitochondriaModels, GeneticMolecular Sequence DataNucleic Acid ConformationPlantsSequence Homology, Amino AcidSequence Homology, Nucleic AcidElectron Transport Complex IV

Identifiers

PMID7490770
OpenAlexW2046280632

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.