PARK9 (encoded by ATP13A2) is a P-type ATPase of unknown function [83], but mutations in the ATP13A2 gene are associated with Kufor-Rakeb syndrome and are found also in patients with various other types of parkinsonism, causing an autosomal recessive parkinsonian syndrome [84]. The gene discussed is ATP13A2; the disease is parkinsonism due to ATP13A2 deficiency.