ArticleMolecular cell2023
A functional link between lariat debranching enzyme and the intron-binding complex is defective in non-photosensitive trichothiodystrophy.
Article in Molecular cell, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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Who cites it
7 citing papers in PubMed, 13 citations in OpenAlex.
- Mechanism of spliceosome termination.Nature · 2026Article
- RNA regulation in plants.Science China. Life sciences · 2026Review
- Transcription-coupled repair: tangled up in convoluted repair.The FEBS journal · 2025Review
- DBR1 orchestrates the fate of lariat RNA: debranching-dependent turnover and function.Nucleic acids research · 2025Review
- RNA sculpting by the primordial Helix-clasp-Helix-Strand-Loop (HcH-SL) motif enforces chemical recognition enabling diverse KH domain functions.The Journal of biological chemistry · 2025Review
- The debranching enzyme Dbr1 regulates lariat turnover and intron splicing.Nature communications · 2024Article
- Trichothiodystrophy-associated MPLKIP maintains DBR1 levels for proper lariat debranching and ectodermal differentiation.EMBO molecular medicine · 2023Article
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Authors and funding
22 authors at 5 institutions in 2 countries.
Funding
Abstract
The pre-mRNA life cycle requires intron processing; yet, how intron-processing defects influence splicing and gene expression is unclear. Here, we find that TTDN1/MPLKIP, which is encoded by a gene implicated in non-photosensitive trichothiodystrophy (NP-TTD), functionally links intron lariat processing to spliceosomal function. The conserved TTDN1 C-terminal region directly binds lariat debranching enzyme DBR1, whereas its N-terminal intrinsically disordered region (IDR) binds the intron-binding complex (IBC). TTDN1 loss, or a mutated IDR, causes significant intron lariat accumulation, as well as splicing and gene expression defects, mirroring phenotypes observed in NP-TTD patient cells. A Ttdn1-deficient mouse model recapitulates intron-processing defects and certain neurodevelopmental phenotypes seen in NP-TTD. Fusing DBR1 to the TTDN1 IDR is sufficient to recruit DBR1 to the IBC and circumvents the functional requirement for TTDN1. Collectively, our findings link RNA lariat processing with splicing outcomes by revealing the molecular function of TTDN1.
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