LRRK2 and Parkinson disease: This post-translational modification has gained much attention after the discovery of a subset of Rabs being phosphorylated by leucine rich-repeat kinase 2 (LRRK2), a Parkinson's disease (PD)-causative protein (Homma et al., 2021; Steger et al., 2016; Waschbüsch and Khan, 2020).