VPS35 and Parkinson disease: Defects in the ALP have been linked with an increasing number of genetic variants identified as causative or associated with PD risk (Gan-Or et al., 2015), including Vps35, a component of the retromer that mediates retrograde transport from endosomes to Golgi, the lysosomal ATPase pump ATP13A2, and LRRK2 (Ramirez et al., 2006; Usenovic et al., 2012; Orenstein et al., 2013; Kong et al., 2014; Tsunemi and Krainc, 2014; Tang et al., 2015; Follett et al., 2016).