ArticleNature communications2026
Composite SMG5-SMG6 PIN domain formation is essential for NMD.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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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.
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.
Who cites it
3 citing papers in PubMed.
- Nonsense-mediated mRNA decay: friend or foe in cancer biology?Cell communication and signaling : CCS · 2026Review
- NMD takes two PIN domains to tango.RNA (New York, N.Y.) · 2026Article
- SMG1:SMG8:SMG9-complex integrity supports efficient execution of nonsense-mediated mRNA decay.Nucleic acids research · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
Nonsense-mediated mRNA decay (NMD) relies on the coordinated assembly and action of multiple protein factors. Degradation of target mRNAs begins with endonucleolytic cleavage near premature stop codons, but the mechanisms of endonuclease activation and regulation remain unclear. Using structural predictions, biochemical in vitro assays, and cell-based NMD analysis, we show that SMG5 and SMG6 interact via their PIN domains to form a composite interface (cPIN) with full endonuclease activity. In vitro reconstituted SMG5-SMG6 cPIN heterodimers show high activity, as SMG5 completes the SMG6 active site and substrate binding site. Mutations in residues at their predicted interaction surfaces, RNA-binding sites, or active site attenuate or abolish cPIN activity in vitro and impair cellular NMD. Our findings demonstrate how paralogous PIN domains complement each other to assemble a highly active endonuclease in NMD, providing a structural and mechanistic explanation for efficient NMD substrate degradation.
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Registered trials
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 Socratic graph.