Detection of slicer activity by immunopurified plant ARGONAUTE1

Laura Arribas Hernandez, Maria Louisa Vigh, Peter Brodersen*

*Corresponding author for this work

Abstract

Small RNA-guided endonucleolysis (“slicing”) of target mRNA is the signature biochemical activity underlying many RNA silencing phenomena. The catalytic slicer activity resides in Argonaute (AGO) proteins. Here, we present two protocols to detect microRNA-guided slicer activity of AGO1 immunopurified from Arabidopsis tissues. The first uses radioactive, cap-labeled RNA substrates produced by in vitro transcription of RNA fragments corresponding to endogenous target sites flanked by 100–200 nucleotides of target sequence. The second protocol uses similarly designed but shorter (around 50 nt) fluorescently labeled RNA. Advantages and disadvantages of the two setups are also discussed.

Original languageEnglish
Title of host publicationPlant MicroRNAs : Methods and Protocols
EditorsStefan de Folter
Number of pages22
PublisherHumana Press
Publication date2019
Pages295-316
Chapter22
ISBN (Print)978-1-4939-9041-2
ISBN (Electronic)978-1-4939-9042-9
DOIs
Publication statusPublished - 2019
SeriesMethods in Molecular Biology
Volume1932
ISSN1064-3745

Keywords

  • Arabidopsis
  • Argonaute
  • Endonucleolysis
  • In vitro assay
  • miRNA
  • Slicing

Fingerprint

Dive into the research topics of 'Detection of slicer activity by immunopurified plant ARGONAUTE1'. Together they form a unique fingerprint.

Cite this