PINK1 and Parkinson disease: Interestingly, several of the familial parkinsonism causative genes exhibit functions of importance for mitochondrial status.6 Notably, mutations in PTEN‐induced Kinase‐1 (PINK1) and parkin are the most common cause of autosomal recessive, early‐onset familial form of PD and have been found to lead to dramatic effects on mitochondrial morphology, quality control and functionality in both human and diverse model organisms.7, 8, 9, 10