A microRNA in a Multiple-Turnover RNAi Enzyme Complex

• György Hutvágner

  Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Lazare Research Building, Room 825, 364 Plantation Street, Worcester, MA 01605, USA.

• Phillip D. Zamore

  Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Lazare Research Building, Room 825, 364 Plantation Street, Worcester, MA 01605, USA.

抄録

In animals, the double-stranded RNA-specific endonuclease Dicer produces two classes of functionally distinct, tiny RNAs: microRNAs (miRNAs) and small interfering RNAs (siRNAs). miRNAs regulate mRNA translation, whereas siRNAs direct RNA destruction via the RNA interference (RNAi) pathway. Here we show that, in human cell extracts, the miRNA let - 7 naturally enters the RNAi pathway, which suggests that only the degree of complementarity between a miRNA and its RNA target determines its function. Human let - 7 is a component of a previously identified, miRNA-containing ribonucleoprotein particle, which we show is an RNAi enzyme complex. Each let - 7 –containing complex directs multiple rounds of RNA cleavage, which explains the remarkable efficiency of the RNAi pathway in human cells.

収録刊行物

• Science

  Science 297 (5589), 2056-2060, 2002-09-20

  American Association for the Advancement of Science (AAAS)

キーワード

• Multidisciplinary

詳細情報

• CRID: 1363951796191402752
• NII論文ID: 80015560451
• DOI: 10.1126/science.1073827
• ISSN: 10959203
• ISSN: 00368075
• Web Site: https://www.science.org/doi/pdf/10.1126/science.1073827
• データソース種別:
  • Crossref
  • CiNii Articles