Assay methods for small ubiquitin-like modifier (SUMO)-SUMO-interacting motif (SIM) interactions in vivo and in vitro using a split-luciferase complementation system

Anal Biochem. 2014 Mar 1:448:92-4. doi: 10.1016/j.ab.2013.12.009. Epub 2013 Dec 11.

Abstract

SUMOylation is a posttranslational process that attaches a small ubiquitin-like modifier (SUMO) to its target proteins covalently. SUMOylation controls multiple cellular processes through the recognition of SUMO by a SUMO-interacting motif (SIM). In this study, we developed assay systems for detecting noncovalent interactions between SUMO and SIM in cells using split-luciferase complementation. We applied a version of this assay to the detection of in vitro SUMO-SIM interactions using a bacterial expression system. These novel assays enable screening of inhibitors of SUMO-dependent protein-protein interactions, either in vivo or in vitro, in a high-throughput manner.

Keywords: Assay; Protein–protein interactions; SIM; SUMOylation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Carrier Proteins / genetics
  • Carrier Proteins / metabolism*
  • Escherichia coli / metabolism
  • Fluorescent Dyes / chemistry
  • Genes, Reporter
  • Humans
  • Light
  • Luciferases / chemistry
  • Luciferases / genetics
  • Luciferases / metabolism*
  • Protein Interaction Domains and Motifs
  • Protein Structure, Tertiary
  • Recombinant Fusion Proteins / chemistry
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / metabolism
  • SUMO-1 Protein / genetics
  • SUMO-1 Protein / metabolism*
  • Spectrometry, Fluorescence*

Substances

  • Carrier Proteins
  • Fluorescent Dyes
  • Recombinant Fusion Proteins
  • SIMC1 protein, human
  • SUMO-1 Protein
  • SUMO1 protein, human
  • Luciferases