RAB29 and Parkinson disease: Rab29 and the retromer subunit VPS35, proteins that are genetically associated with PD and play key roles in lysosomal function by regulating sorting between the endolysosomal system and the trans-Golgi network, can modulate LRRK2 activity, as overexpression of Rab29 or expression of the pathogenic VPS35 D620N variant lead to significantly elevated LRRK2-mediated phosphorylation of Rab10 and other Rab substrates (Liu et al., 2018; Mir et al., 2018; Purlyte et al., 2018).