Mutations in SNCA (PARK1-4) and LRRK2 (PARK8) are responsible for autosomal-dominant PD forms, while mutations in Parkin (PARK2), PINK1 (PARK6), DJ-1 (PARK7), and ATP13A2 (PARK9) are associated with autosomal recessive forms of PD [65]. This evidence concerns the gene ATP13A2 and Parkinson disease.