Abstract
Small ubiquitin-related modifier-2/3 (SUMO-2/3) is a member of the ubiquitin-like (Ubl) protein family. Conjugation of SUMO-2/3 to target proteins is influenced by various stress conditions and chemical inhibitors. SUMO-2/3 conjugation may serve as a neuroprotective mechanism and may play a role in protein quality control. A method for screening global changes in SUMO-2/3 conjugation would facilitate further research of SUMO-2/3 cellular function. Here we show that dot blot with immunochemical detection allows evaluation of changes in global cellular SUMO-2/3 conjugation and offers an alternative to more laborious Western blot analysis. The method is based on a change of SUMO-2/3 signal intensity upon its conjugation. The dot blot analysis presented here is a time-saving method that enables screening of large numbers of samples and easy statistical evaluation of the results.
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