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RDE-3 adds poly UG tails to mRNAs targeted for silencing by the dsRNA-initiated RNA interference (RNAi) pathway. RDE-3 can also add p(UG) tails to some endogenous cellular mRNAs. Mechanisms directing RDE-3 to pUGylate specific mRNAs are not understood. Here we show that the miRNA directs pUGylation of an intestine-specific mRNA , which leads to silencing of the mRNA. The data show that genome-encoded small regulatory RNAs are one mechanism by which RDE-3 can be directed to pUGylate specific mRNAs for gene regulation.
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http://dx.doi.org/10.17912/micropub.biology.001754 | DOI Listing |
MicroPubl Biol
August 2025
Genetics, Harvard Medical School, Boston, MA, USA.
RDE-3 adds poly UG tails to mRNAs targeted for silencing by the dsRNA-initiated RNA interference (RNAi) pathway. RDE-3 can also add p(UG) tails to some endogenous cellular mRNAs. Mechanisms directing RDE-3 to pUGylate specific mRNAs are not understood.
View Article and Find Full Text PDFbioRxiv
July 2025
Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA.
RNA interference (RNAi) is a component of the innate immune systems of many eukaryotes, including . During RNAi in , the nucleotidyltransferase RDE-3 modifies the 3' termini of mRNAs with polyUG (pUG) tails, which recruit RNA-dependent RNA Polymerase (RdRP) enzymes that drive gene silencing by synthesizing antisense small interfering (si)RNAs. During normal growth and development, RDE-3 pUGylates transposon RNAs to silence transposons and protect genomic integrity.
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