Discovery of RNA-binding proteins and characterization of their dynamic responses by enhanced RNA interactome capture

Nat Commun. 2018 Oct 23;9(1):4408. doi: 10.1038/s41467-018-06557-8.

Abstract

Following the realization that eukaryotic RNA-binding proteomes are substantially larger than anticipated, we must now understand their detailed composition and dynamics. Methods such as RNA interactome capture (RIC) have begun to address this need. However, limitations of RIC have been reported. Here we describe enhanced RNA interactome capture (eRIC), a method based on the use of an LNA-modified capture probe, which yields numerous advantages including greater specificity and increased signal-to-noise ratios compared to existing methods. In Jurkat cells, eRIC reduces the rRNA and DNA contamination by >10-fold compared to RIC and increases the detection of RNA-binding proteins. Due to its low background, eRIC also empowers comparative analyses of changes of RNA-bound proteomes missed by RIC. For example, in cells treated with dimethyloxalylglycine, which inhibits RNA demethylases, eRIC identifies m6A-responsive RNA-binding proteins that escape RIC. eRIC will facilitate the unbiased characterization of RBP dynamics in response to biological and pharmacological cues.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine / analogs & derivatives
  • Adenosine / metabolism
  • Amino Acids, Dicarboxylic / pharmacology
  • Genome
  • Humans
  • Jurkat Cells
  • Poly A / metabolism
  • Protein Interaction Maps* / drug effects
  • RNA / metabolism*
  • RNA, Ribosomal / metabolism
  • RNA-Binding Proteins / metabolism*
  • TOR Serine-Threonine Kinases / metabolism

Substances

  • Amino Acids, Dicarboxylic
  • RNA, Ribosomal
  • RNA-Binding Proteins
  • Poly A
  • RNA
  • N-methyladenosine
  • TOR Serine-Threonine Kinases
  • Adenosine
  • oxalylglycine