GBA1 and Parkinson disease: Common GBA1 variants in PD include p.E365K (NM_000157.4, c.1093G > A), p.T408M (NM_000157.4, c.1223 C > T), p.N409S (NM_000157.4, c.1226 A > G), and p.L483P (NM_000157.4, c.1448T > C).