Transcriptional silencing and promoter methylation triggered by double-stranded RNA

Michael Mette, W. Aufsatz, J. Van der Winden, M. A. Matzke, A. J.M. Matzke*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

694 Scopus citations

Abstract

Double-stranded RNA induces a post-transcriptional gene silencing process, termed RNAi, in diverse organisms. It is shown here that transcriptional gene silencing accompanied by de novo methylation of a target promoter in plants can be triggered by a double-stranded RNA containing promoter sequences. Similar to the double-stranded RNA involved in RNAi, this promoter double-stranded RNA, which is synthesized in the nucleus, is partially cleaved into small RNAs ~23 nucleotides in length. Both transcriptional and post-transcriptional gene silencing can thus be initiated by double-stranded RNAs that enter the same degradation pathway. The results also implicate double-stranded RNA in directing DNA methylation. Different constructs designed to produce double-stranded promoter RNA in various ways were evaluated for their ability to induce gene silencing in tobacco and Arabidopsis. RNA hairpins transcribed from inverted DNA repeats were the most effective trans-acting silencing signals. This strategy could be useful for transcriptionally downregulating genes in a variety of plants.

Original languageEnglish (US)
Pages (from-to)5194-5201
Number of pages8
JournalEMBO Journal
Volume19
Issue number19
DOIs
StatePublished - Oct 2 2000

Keywords

  • DNA methylation
  • Double-stranded RNA
  • RNAi
  • Small RNAs
  • Transcriptional gene silencing

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

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