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Updated: May 12, 2026

Localization of SUMO-modified Proteins Using Fluorescent Sumo-trapping Proteins
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Analysis of SUMOylated proteins using SUMO-traps.

Elisa Da Silva-Ferrada1, Wendy Xolalpa, Valérie Lang

  • 1Proteomics Unit, CIC bioGUNE, CIBERehd, Bd. 801A, Bizkaia Technology Park, Derio, 48160, Bizkaia, Spain.

Scientific Reports
|April 23, 2013
PubMed
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Scientists developed SUMO-traps using SUMO interacting motifs (SIMs) to capture SUMOylated proteins. These traps effectively isolate key proteins, aiding the study of SUMOylation

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Biology

Background:

  • SUMOylation is a crucial post-translational modification regulating cellular processes.
  • SUMO-interacting motifs (SIMs) are known to bind SUMO-modified proteins.

Purpose of the Study:

  • To develop a novel system for capturing and purifying endogenous SUMOylated proteins.
  • To investigate the utility of SIMs in creating affinity-based capture systems.

Main Methods:

  • Engineering SUMO-traps by fusing SIMs to a GST carrier protein.
  • Testing the binding specificity and capacity of SUMO-traps for polySUMO chains.
  • Validating the in vitro and in vivo purification of known SUMOylated proteins (IκBα, PTEN, PML, p53).

Main Results:

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  • SIMs retain SUMO-binding activity when fused to GST.
  • Tandem SIM disposition enhances binding specificity for polySUMO chains over polyubiquitin.
  • Successful purification of multiple endogenous SUMOylated proteins using the SUMO-trap system.

Conclusions:

  • SUMO-traps are effective tools for capturing and purifying SUMOylated proteins.
  • This system facilitates the study of protein SUMOylation and its regulatory functions.
  • The developed SUMO-trap technology offers a versatile approach for biochemical and cellular research.