Sumoylation is a post-translational modification process that is supposed to be implicated in the pathogenesis of several neurodegenerative diseases. Recently, the microtubule-associated protein Tau was identified as a target for sumoylation in the analysis of the transfected cells. We investigated the localization of SUMO-1 protein in APP transgenic mice and mutant Tau transgenic mice, and found that SUMO-1 immunoreactivity was co-localized with phosphorylated Tau aggregates in amyloid plaques of APP transgenic mice.
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