Characterization of L1-ribonucleoprotein particles

Martin S. Taylor, John La Cava, Lixin Dai, Paolo Mita, Kathleen H. Burns, Michael P. Rout, Jef D. Boeke

Research output: Chapter in Book/Report/Conference proceedingChapter


The LINE-1 retrotransposon (L1) encodes two proteins, ORF1p and ORF2p, which bind to the L1 RNA in cis, forming a ribonucleoprotein (RNP) complex that is critical for retrotransposition. Interactions with both permissive and repressive host factors pervade every step of the L1 life cycle. Until recently, limitations in detection and production precluded in-depth characterization of L1 RNPs. Inducible expression and recombinant engineering of epitope tags have made detection of both L1 ORFs routine. Here, we describe large-scale production of L1-expressing HEK-293T cells in suspension cell culture, cryomilling and affinity capture of L1 RNP complexes, sample preparation for analysis by mass spectrometry, and assay using the L1 element amplification protocol (LEAP) and qRT-PCR.

Original languageEnglish (US)
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Number of pages28
StatePublished - 2016

Publication series

NameMethods in Molecular Biology
ISSN (Print)1064-3745


  • Affinity purification
  • Cryomilling
  • Interactomics
  • LINE-1
  • Mass spectrometry
  • Metabolic labelling
  • Protein complexes
  • Ribonucleoprotein

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics


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