ArticleNucleic acids research2023
Miniature RNAs are embedded in an exceptionally protein-rich mitoribosome via an elaborate assembly pathway.
Article in Nucleic acids research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 14 citations in OpenAlex.
- Mitochondrial ribosomes in apicomplexan and trypanosomatid parasites: Dissimilar drivers of complexity and convergent features.PLoS pathogens · 2026Article
- Genetic Manipulation of Paradiplonema papillatum.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Biochemistry of Diplonemids.Methods in molecular biology (Clifton, N.J.) · 2026Article
- The mitochondrial proteome of diplonemids: from conventional pathways to eccentric RNA editing and transcript processing.BMC genomics · 2025Article
- Subcellular proteomics of the protist Paradiplonema papillatum reveals the digestive capacity of the cell membrane and the plasticity of peroxisomes across euglenozoans.PLoS biology · 2025Article
- Splice site diversity and abundance of noncanonical introns in diplonemids (Diplonemea, Euglenozoa).RNA (New York, N.Y.) · 2025Article
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- Mitochondrial genomes revisited: why do different lineages retain different genes?BMC biology · 2024Review
- Mitochondrial proteins as therapeutic targets in diabetic ketoacidosis: evidence from Mendelian randomization analysis.Frontiers in pharmacology · 2024Article
- GTPase Era at the heart of ribosome assembly.Frontiers in molecular biosciences · 2023Review
- Stunning Intricacies of RNA Editing Complexes RECC, RESC, and REH2C: Functional Organization, Developmental Regulation, and Evolutionary History in Kinetoplastid Protists.Wiley interdisciplinary reviews. RNAReview
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Authors and funding
10 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mitochondrial ribosome (mitoribosome) has diverged drastically from its evolutionary progenitor, the bacterial ribosome. Structural and compositional diversity is particularly striking in the phylum Euglenozoa, with an extraordinary protein gain in the mitoribosome of kinetoplastid protists. Here we report an even more complex mitoribosome in diplonemids, the sister-group of kinetoplastids. Affinity pulldown of mitoribosomal complexes from Diplonema papillatum, the diplonemid type species, demonstrates that they have a mass of > 5 MDa, contain as many as 130 integral proteins, and exhibit a protein-to-RNA ratio of 11:1. This unusual composition reflects unprecedented structural reduction of ribosomal RNAs, increased size of canonical mitoribosomal proteins, and accretion of three dozen lineage-specific components. In addition, we identified >50 candidate assembly factors, around half of which contribute to early mitoribosome maturation steps. Because little is known about early assembly stages even in model organisms, our investigation of the diplonemid mitoribosome illuminates this process. Together, our results provide a foundation for understanding how runaway evolutionary divergence shapes both biogenesis and function of a complex molecular machine.
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