ArticleBMC evolutionary biology2017
Evolution of group I introns in Porifera: new evidence for intron mobility and implications for DNA barcoding.
Article in BMC evolutionary biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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18 citing papers in PubMed, 53 citations in OpenAlex.
- Insights into the Phylogeny ofJournal of fungi (Basel, Switzerland) · 2026Article
- First Report on Presence of Mitochondrial Introns in Freshwater Sponges, and Pseudogenic Evidence of Their Loss.Journal of molecular evolution · 2026Article
- An Alternative Self-Splicing Intron Lifecycle Revealed by Dynamic Intron Turnover in Epichloë Endophyte Mitochondrial Genomes.Molecular biology and evolution · 2025Article
- Mitochondrially mediated RNA interference, a retrograde signaling system affecting nuclear gene expression.Heredity · 2024Article
- Article
- Phylomitogenomics bolsters the high-level classification of Demospongiae (phylum Porifera).PloS one · 2023Article
- Organellar Introns in Fungi, Algae, and Plants.Cells · 2021Review
- The Mitochondrial Genome of the Sea AnemoneLife (Basel, Switzerland) · 2021Article
- Article
- Recent and Ongoing Horizontal Transfer of Mitochondrial Introns Between Two Fungal Tree Pathogens.Frontiers in microbiology · 2021Article
- Revealing the high variability on nonconserved core and mobile elements of Austropuccinia psidii and other rust mitochondrial genomes.PloS one · 2021Article
- The insertion of a mitochondrial selfish element into the nuclear genome and its consequences.Ecology and evolution · 2020Article
- Putative group I introns in the eukaryote nuclear internal transcribed spacers.Current genetics · 2020Article
- Fungal Mitogenomes: Relevant Features to Planning Plant Disease Management.Frontiers in microbiology · 2020Review
- Article
- Divergence times in demosponges (Porifera): first insights from new mitogenomes and the inclusion of fossils in a birth-death clock model.BMC evolutionary biology · 2018Article
- Unravelling the moons: review of the generaZooKeys · 2018Article
- Deep RNA sequencing reveals the smallest known mitochondrial micro exon in animals: The placozoan cox1 single base pair exon.PloS one · 2017Article
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Authors and funding
8 authors at 8 institutions in 5 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundMitochondrial introns intermit coding regions of genes and feature characteristic secondary structures and splicing mechanisms. In metazoans, mitochondrial introns have only been detected in sponges, cnidarians, placozoans and one annelid species. Within demosponges, group I and group II introns are present in six families. Based on different insertion sites within the cox1 gene and secondary structures, four types of group I and two types of group II introns are known, which can harbor up to three encoding homing endonuclease genes (HEG) of the LAGLIDADG family (group I) and/or reverse transcriptase (group II). However, only little is known about sponge intron mobility, transmission, and origin due to the lack of a comprehensive dataset. We analyzed the largest dataset on sponge mitochondrial group I introns to date: 95 specimens, from 11 different sponge genera which provided novel insights into the evolution of group I introns.
resultsFor the first time group I introns were detected in four genera of the sponge family Scleritodermidae (Scleritoderma, Microscleroderma, Aciculites, Setidium). We demonstrated that group I introns in sponges aggregate in the most conserved regions of cox1. We showed that co-occurrence of two introns in cox1 is unique among metazoans, but not uncommon in sponges. However, this combination always associates an active intron with a degenerating one. Earlier hypotheses of HGT were confirmed and for the first time VGT and secondary losses of introns conclusively demonstrated.
conclusionThis study validates the subclass Spirophorina (Tetractinellida) as an intron hotspot in sponges. Our analyses confirm that most sponge group I introns probably originated from fungi. DNA barcoding is discussed and the application of alternative primers suggested.
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