SLC30A9 and Oculomotor apraxia: Additionally, it was proposed that SLC-30A9 is crucial for sperm activation and organismal fertility, and in neurons, the SLC-30A9 mutation is responsible for Birk–Landau–Perez cerebrorenal syndrome—an autosomal recessive syndrome, characterized by nephropathy, muscle weakness, intellectual disability, camptocormia and oculomotor apraxia [30,31].