Evidence map›Paper›PMID 25313038›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2014

Evolution of a morphological novelty occurred before genome compaction in a lineage of extreme parasites.

Karen L Haag, Timothy Y James, Jean-François Pombert, Ronny Larsson, Tobias M M Schaer, Dominik Refardt, Dieter Ebert

Erratum issuedOpen access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 66 papers.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed
8.1field-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

66 citing papers in PubMed, 137 citations in OpenAlex.

  1. Review
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  4. Enzymology of the metazoan tRNA ligase complex: a lifetime in cycles.Cellular and molecular life sciences : CMLS · 2026
    Review
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  15. Morphological characterization and genetic diversity of a new microsporidium,Frontiers in cellular and infection microbiology · 2023
    Article
  16. Article
  17. Article
  18. Article
  19. Impact of Genome Reduction in Microsporidia.Experientia supplementum (2012) · 2022
    Article
  20. Review

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 4 countries.

Karen L HaagZoological Institute, Basel University, 4051 Basel, Switzerland; Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, 91501-970 RS, Brazil; karen.haag@ufrgs.br.
Timothy Y JamesDepartment of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109;
Jean-François PombertDepartment of Biological and Chemical Sciences, Illinois Institute of Technology, Chicago, IL 60616;
Ronny LarssonDepartment of Biology, University of Lund, SE-223 62 Lund, Sweden; and.
Tobias M M SchaerZoological Institute, Basel University, 4051 Basel, Switzerland;
Dominik RefardtZoological Institute, Basel University, 4051 Basel, Switzerland; Institute of Natural Resource Sciences, Zurich University of Applied Sciences, 8820 Wädenswil, Switzerland.
Dieter EbertZoological Institute, Basel University, 4051 Basel, Switzerland;
University of Basel · CHIllinois Institute of Technology · USLund University · SEUniversity of Michigan–Ann Arbor · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Intracellular parasitism results in extreme adaptations, whose evolutionary history is difficult to understand, because the parasites and their known free-living relatives are so divergent from one another. Microsporidia are intracellular parasites of humans and other animals, which evolved highly specialized morphological structures, but also extreme physiologic and genomic simplification. They are suggested to be an early-diverging branch on the fungal tree, but comparisons to other species are difficult because their rates of molecular evolution are exceptionally high. Mitochondria in microsporidia have degenerated into organelles called mitosomes, which have lost a genome and the ability to produce ATP. Here we describe a gut parasite of the crustacean Daphnia that despite having remarkable morphological similarity to the microsporidia, has retained genomic features of its fungal ancestors. This parasite, which we name Mitosporidium daphniae gen. et sp. nov., possesses a mitochondrial genome including genes for oxidative phosphorylation, yet a spore stage with a highly specialized infection apparatus--the polar tube--uniquely known only from microsporidia. Phylogenomics places M. daphniae at the root of the microsporidia. A comparative genomic analysis suggests that the reduction in energy metabolism, a prominent feature of microsporidian evolution, was preceded by a reduction in the machinery controlling cell cycle, DNA recombination, repair, and gene expression. These data show that the morphological features unique to M. daphniae and other microsporidia were already present before the lineage evolved the extreme host metabolic dependence and loss of mitochondrial respiration for which microsporidia are well known.

Indexed as

Evolution, MolecularPhylogenyAnimalsGenome, FungalGenomicsMicrosporidiaMolecular Sequence AnnotationMolecular Sequence DataParasitesSequence Analysis, DNASpecies SpecificityDaphniaevolution of extreme parasitismgenome evolutionmicrosporidiaphylogenomics

Identifiers

PMID25313038
PMCPMC4217409
OpenAlexW2034116516

What OpenQuestion holds

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Read underepoch 390

Registered trials

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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.