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Updated: Jun 22, 2026

In Vitro SUMOylation Assay to Study SUMO E3 Ligase Activity
Published on: January 29, 2018
System-wide changes to SUMO modifications in response to heat shock
Filip Golebiowski1, Ivan Matic, Michael H Tatham
11Wellcome Trust Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.
Small ubiquitin-like modifier (SUMO) proteins are crucial for cells to survive heat shock. This study reveals how SUMOylation changes across many proteins during heat stress, impacting vital cellular processes.
Area of Science:
- Cellular Biology
- Proteomics
- Stress Response
Background:
- Small ubiquitin-like modifier (SUMO) conjugation regulates eukaryotic cellular mechanisms.
- The signals controlling SUMOylation of substrates are not well understood.
Purpose of the Study:
- To investigate the role of SUMO proteins in cellular response to heat shock.
- To identify heat shock-induced changes in SUMOylation and their substrates.
Main Methods:
- Quantitative labeling techniques
- Stringent purification of SUMOylated proteins
- Mass spectrometry and advanced data analysis
Main Results:
- SUMO-2 and SUMO-3 are essential for cells to survive heat shock.
- Identified 766 heat shock-induced SUMOylation substrates.
- SUMOylation redistributed across proteins involved in cell cycle, apoptosis, protein trafficking, transcription, and DNA repair.
Conclusions:
- SUMO proteins play a critical role in the cellular response to hyperthermic stress.
- SUMOylation impacts a broad range of cellular functions during heat shock.
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