Mutations that cause Parkinson's disease prevent cells from destroying defective mitochondria, according to a study published online May 10 in the Journal of Cell Biology. Defects in the ubiquitin ligase Parkin are linked to early-onset cases of this neurodegenerative disorder. The wild-type protein promotes the removal of impaired mitochondria by a specialized version of the autophagy pathway called mitophagy, delivering mitochondria to the lysosomes for degradation...

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