PINK1 and Parkinson disease: On the contrary, mitochondrial aggregation of SIAH3 is triggered by α‐SynPFF, and full pathology of PINK1 is observed in later stages of α‐synuclein pathology in PD brains, suggesting that co‐aggregation of SIAH3 and PINK1 in the mitochondria may represent a downstream process to pathogenic α‐synuclein.