Another important player in the endosomal cargo sorting is a DNAJC13 [DnaJ heat shock protein family (Hsp40) member C13], which associates with SNX1 and has been linked to an autosomal-dominant, late-onset familial form of PD (PARK21) (McGough and Cullen, 2013; Freeman et al., 2014; Vilariño-Güell et al., 2014; Gustavsson et al., 2015). The gene discussed is DNAJC13; the disease is Parkinson disease.