Evidence map›Paper›PMID 22916303›Full record

ArticlePloS one2012

Tertiary endosymbiosis in two dinotoms has generated little change in the mitochondrial genomes of their dinoflagellate hosts and diatom endosymbionts.

Behzad Imanian, Jean-François Pombert, Richard G Dorrell, Fabien Burki, Patrick J Keeling

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
2.0field-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

21 citing papers in PubMed, 65 citations in OpenAlex.

  1. An acetyltransferase family required for biosynthesis of diverse marine carotenoids.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Article
  3. Review
  4. Article
  5. PeerJ · 2021
    Article
  6. Article
  7. Dinoflagellates with relic endosymbiont nuclei as models for elucidating organellogenesis.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  8. Review
  9. A single-cell genome perspective on studying intracellular associations in unicellular eukaryotes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019
    Article
  10. A kleptoplastidic dinoflagellate and the tipping point between transient and fully integrated plastid endosymbiosis.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  11. Article
  12. Article
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  16. Integration of plastids with their hosts: Lessons learned from dinoflagellates.Proceedings of the National Academy of Sciences of the United States of America · 2015
    Review
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  18. Article
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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.

Behzad ImanianDepartment of Botany, Canadian Institute for Advanced Research, University of British Columbia, Vancouver, British Columbia, Canada.
Jean-François Pombert
Richard G Dorrell
Fabien Burki
Patrick J Keeling
Canadian Institute for Advanced Research · CAUniversity of British Columbia · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMitochondria or mitochondrion-derived organelles are found in all eukaryotes with the exception of secondary or tertiary plastid endosymbionts. In these highly reduced systems, the mitochondrion has been lost in all cases except the diatom endosymbionts found in a small group of dinoflagellates, called 'dinotoms', the only cells with two evolutionarily distinct mitochondria. To investigate the persistence of this redundancy and its consequences on the content and structure of the endosymbiont and host mitochondrial genomes, we report the sequences of these genomes from two dinotoms. METHODOLOGY/PRINCIPAL

findingsThe endosymbiont mitochondrial genomes of Durinskia baltica and Kryptoperidinium foliaceum exhibit nearly identical gene content with other diatoms, and highly conserved gene order (nearly identical to that of the raphid pennate diatom Fragilariopsis cylindrus). These two genomes are differentiated from other diatoms' by the fission of nad11 and by an insertion within nad2, in-frame and unspliced from the mRNA. Durinskia baltica is further distinguished from K. foliaceum by two gene fusions and its lack of introns. The host mitochondrial genome in D. baltica encodes cox1 and cob plus several fragments of LSU rRNA gene in a hugely expanded genome that includes numerous pseudogenes, and a trans-spliced cox3 gene, like in other dinoflagellates. Over 100 distinct contigs were identified through 454 sequencing, but intact full-length genes for cox1, cob and the 5' exon of cox3 were present as a single contig each, suggesting most of the genome is pseudogenes. The host mitochondrial genome of K. foliaceum was difficult to identify, but fragments of all the three protein-coding genes, corresponding transcripts, and transcripts of several LSU rRNA fragments were all recovered. CONCLUSIONS/SIGNIFICANCE: Overall, the endosymbiont and host mitochondrial genomes in the two dinotoms have changed surprisingly little from those of free-living diatoms and dinoflagellates, irrespective of their long coexistence side by side in dinotoms.

Indexed as

DiatomsDinoflagellidaDNA, MitochondrialGenome, MitochondrialSymbiosisDNA, Mitochondrial

Identifiers

PMID22916303
PMCPMC3423374
OpenAlexW2102665007

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.