TKTL1 and Parkinson disease: 29 additional events involved truncation, occurring in non-NMD genes and included five of the 29 PD signature genes that we previously identified in this same cohort: the B cell development controller LRRC8C, the solute carrier protein SLC6A8, the ATPase ATP11B, the cell division cycle protein CDC20 and TKTL1 [35].