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Cited by 346

The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.

Decay of mRNAs targeted by RISC requires XRN1, the Ski complex, and the exosome

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ORBAN, TAMAS I., IZAURRALDE, ELISA·2005·RNA

Abstract

RNA interference (RNAi) is a conserved RNA silencing pathway that leads to sequence-specific mRNA decay in response to the presence of double-stranded RNA (dsRNA). Long dsRNA molecules are first processed by Dicer into 21–22-nucleotide small interfering RNAs (siRNAs). The siRNAs are incorporated into a multimeric RNA-induced silencing complex (RISC) that cleaves mRNAs at a site determined by complementarity with the siRNAs. Following this initial endonucleolytic cleavage, the mRNA is degraded by a mechanism that is not completely understood. We investigated the decay pathway of mRNAs targeted by RISC in Drosophila cells. We show that 5′ mRNA fragments generated by RISC cleavage are rapidly degraded from their 3′ ends by the exosome, whereas the 3′ fragments are degraded from their 5′ ends by XRN1. Exosome-mediated decay of the 5′ fragments requires the Drosophila homologs of yeast Ski2p, Ski3p, and Ski8p, suggesting that their role as regulators of exosome activity is conserved. Our findings indicate that mRNAs targeted by siRNAs are degraded from the ends generated by RISC cleavage, without undergoing decapping or deadenylation.

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Metadata

Authors
ORBAN, T. I., & IZAURRALDE, E.
Venue
RNA
Published
2005-02-09
Volume
11
Issue
4
Pages
459-469
ISSN
  • 1355-8382 (ISSN-L)
  • 1469-9001
OpenAlex
W2142084170
Cited by
346
References
59
FWCI
10.14
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Decay of mRNAs targeted by RISC requires XRN1, the Ski complex, and the exosome. https://app.cochat.ai/papers/10.1261/rna.7231505
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ORBAN, T. I., & IZAURRALDE, E. (2005). Decay of mRNAs targeted by RISC requires XRN1, the Ski complex, and the exosome. RNA. https://doi.org/10.1261/rna.7231505

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