ArticleNucleic acids research2023
Trypanosome RNA helicase KREH2 differentially controls non-canonical editing and putative repressive structure via a novel proposed 'bifunctional' gRNA in mRNA A6.
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 9 papers.
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Who cites it
9 citing papers in PubMed, 10 citations in OpenAlex.
- KREPA6 functions in RNA editing catalytic complex structural organization and gRNA utilization in Trypanosoma brucei.Nucleic acids research · 2026Article
- Comparative mitochondrial genome and transcriptome analyses reveal strain-specific features of RNA editing in Trypanosoma brucei.Nucleic acids research · 2025Article
- KRBP72 facilitates ATPase-dependent editing progression through a structural roadblock in mitochondrial A6 mRNA.Nucleic acids research · 2025Article
- KREH2 helicase represses ND7 mRNA editing in procyclic-stage Trypanosoma brucei by opposite modulation of canonical and 'moonlighting' gRNA utilization creating a proposed mRNA structure.Nucleic acids research · 2024Article
- RESC14 and RESC8 cooperate to mediate RESC function and dynamics during trypanosome RNA editing.Nucleic acids research · 2024Article
- Blastocrithidia nonstop mitochondrial genome and its expression are remarkably insulated from nuclear codon reassignment.Nucleic acids research · 2024Article
- Prioritization of Trypanosoma brucei editosome protein interactions interfaces at residue resolution through proteome-scale network analysis.BMC molecular and cell biology · 2024Article
- RNA editing catalytic complexes edit multiple mRNA sites non-processively in Trypanosoma brucei.Molecular and biochemical parasitology · 2023Article
- 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
17 authors at 5 institutions in 2 countries.
Funding
Abstract
U-insertion/deletion (U-indel) RNA editing in trypanosome mitochondria is directed by guide RNAs (gRNAs). This editing may developmentally control respiration in bloodstream forms (BSF) and insect procyclic forms (PCF). Holo-editosomes include the accessory RNA Editing Substrate Binding Complex (RESC) and RNA Editing Helicase 2 Complex (REH2C), but the specific proteins controlling differential editing remain unknown. Also, RNA editing appears highly error prone because most U-indels do not match the canonical pattern. However, despite extensive non-canonical editing of unknown functions, accurate canonical editing is required for normal cell growth. In PCF, REH2C controls editing fidelity in RESC-bound mRNAs. Here, we report that KREH2, a REH2C-associated helicase, developmentally controls programmed non-canonical editing, including an abundant 3' element in ATPase subunit 6 (A6) mRNA. The 3' element sequence is directed by a proposed novel regulatory gRNA. In PCF, KREH2 RNAi-knockdown up-regulates the 3' element, which establishes a stable structure hindering element removal by canonical initiator-gRNA-directed editing. In BSF, KREH2-knockdown does not up-regulate the 3' element but reduces its high abundance. Thus, KREH2 differentially controls extensive non-canonical editing and associated RNA structure via a novel regulatory gRNA, potentially hijacking factors as a 'molecular sponge'. Furthermore, this gRNA is bifunctional, serving in canonical CR4 mRNA editing whilst installing a structural element in A6 mRNA.
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