Acts upstream of or within several processes, including flagellated sperm motility; social behavior; and sperm mitochondrion organization. Located in Golgi apparatus; neuronal dense core vesicle lumen; and sperm midpiece. Is expressed in central nervous system; retina; and thymus primordium. Used to study choreaacanthocytosis. Human ortholog(s) of this gene implicated in choreaacanthocytosis and choreatic disease. Orthologous to human VPS13A (vacuolar protein sorting 13 homolog A). [provided by Alliance of Genome Resources, Apr 2022]