The most well-known, if not invariable, pathological hallmark of Parkinson's disease is the presence of Lewy bodies, protein aggregates composed of α-synuclein, in dopaminergic neurons in the affected brain region (Dauer and Przedborski, 2003, Halliday et al., 2014, Polymeropoulos et al., 1997, Spillantini et al., 1997). Here, SNCA is linked to Parkinson disease.