Title: The deubiquitinase USP15 antagonizes Parkin-mediated mitochondrial ubiquitination and mitophagy
Authors: Cornelissen, Tom
Haddad, Dominik
Wauters, Fieke
Van Humbeeck, Cindy
Mandemakers, Wim
Koentjoro, Brianada
Sue, Carolyn
Gevaert, Kris
De Strooper, Bart
Verstreken, Patrik
Vandenberghe, Wim # ×
Issue Date: Oct-2014
Publisher: IRL Press
Series Title: Human Molecular Genetics vol:23 issue:19 pages:5227-42
Article number: ddu244
Abstract: Loss-of-function mutations in PARK2, the gene encoding the E3 ubiquitin ligase Parkin, are the most frequent cause of recessive Parkinson's disease (PD). Parkin translocates from the cytosol to depolarized mitochondria, ubiquitinates outer mitochondrial membrane proteins and induces selective autophagy of the damaged mitochondria (mitophagy). Here, we show that ubiquitin-specific protease 15 (USP15), a deubiquitinating enzyme (DUB) widely expressed in brain and other organs, opposes Parkin-mediated mitophagy, while a panel of other DUBs and a catalytically inactive version of USP15 do not. Moreover, knockdown of USP15 rescues the mitophagy defect of PD patient fibroblasts with PARK2 mutations and decreased Parkin levels. USP15 does not affect the ubiquitination status of Parkin or Parkin translocation to mitochondria, but counteracts Parkin-mediated mitochondrial ubiquitination. Knockdown of the DUB CG8334, the closest homolog of USP15 in Drosophila, largely rescues the mitochondrial and behavioral defects of parkin RNAi flies. These data identify USP15 as an antagonist of Parkin and suggest that USP15 inhibition could be a therapeutic strategy for PD cases caused by reduced Parkin levels.
ISSN: 0964-6906
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Human Genetics - miscellaneous
Laboratory for Parkinson Research
Laboratory of Neuronal Communication
Laboratory for the Research of Neurodegenerative Diseases
× corresponding author
# (joint) last author

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