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  • Mapping of SUMO sites and analysis of SUMOylation changes induced by external stimuli.

Mapping of SUMO sites and analysis of SUMOylation changes induced by external stimuli.

Proceedings of the National Academy of Sciences of the United States of America (2014-08-13)
Francis Impens, Lilliana Radoshevich, Pascale Cossart, David Ribet
ABSTRACT

SUMOylation is an essential ubiquitin-like modification involved in important biological processes in eukaryotic cells. Identification of small ubiquitin-related modifier (SUMO)-conjugated residues in proteins is critical for understanding the role of SUMOylation but remains experimentally challenging. We have set up a powerful and high-throughput method combining quantitative proteomics and peptide immunocapture to map SUMOylation sites and have analyzed changes in SUMOylation in response to stimuli. With this technique we identified 295 SUMO1 and 167 SUMO2 sites on endogenous substrates of human cells. We further used this strategy to characterize changes in SUMOylation induced by listeriolysin O, a bacterial toxin that impairs the host cell SUMOylation machinery, and identified several classes of host proteins specifically deSUMOylated in response to this toxin. Our approach constitutes an unprecedented tool, broadly applicable to various SUMO-regulated cellular processes in health and disease.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Gly-Gly, ≥99% (titration)
Sigma-Aldrich
Gly-Gly, BioPerformance Certified, suitable for cell culture, ≥99%
Sigma-Aldrich
Gly-Gly, BioUltra, ≥99.5% (NT)
Sigma-Aldrich
Gly-Gly, Vetec, reagent grade, 99%
SAFC
GlycylGlycine