ArticlebioRxiv : the preprint server for biology2025
Pseudouridine selects RNAs for extracellular transport.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
11 authors.
Funding
Abstract
RNAs move through the extracellular space to transmit information between cells, including mammalian neurons, yet how specific RNAs are channeled into these extracellular routes is unknown. Using genome-wide CRISPR screening, proteomics, and high-sensitivity transcriptomics in a neuronal cell line, we identify domesticated retroviral proteins and RNA-modifying enzymes that regulate RNA loading into and transportation via extracellular vesicles. We show that the pseudouridine synthase PUS1 is a key determinant of RNA trafficking, and that its catalytic product in RNA, pseudouridine, is both necessary and sufficient for extracellular RNA export. We further show that myosin light chain 6 (MYL6) is a pseudouridine-binding protein required for secretion of synthetic and endogenous RNAs. These findings reveal a biochemical code linking chemical RNA modification to extracellular transport, and establish a framework to study the function of extracellular RNAs in the nervous system and beyond.
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Registered trials
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