LRRK2 is phosphorylated on a cluster of phosphosites including Ser910, Ser935, Ser955 and Ser973, which are dephosphorylated in several PD-related LRRK2 mutants (N1437H, R1441C/G, Y1699C and I2020T) linking the regulation of these sites to PD. This evidence concerns the gene LRRK2 and Parkinson disease.