C9orf72 and supranuclear palsy, progressive, 1: So far, little evidence has been published on the PSP phenotype and links to other genes (e.g., NPC1 gene, C9orf72 gene, parkin gene (PARK2), transactivation response element DNA-binding protein gene (TARDBP), progranulin gene (GRN), TANK-binding kinase 1 gene (TBK1) and bassoon gene (BSN)) [19].