Necessary for the survival of cerebellar neurons. Induces neuritogenesis by activating the Ras-MAP kinase pathway. May play a role in the maintenance of a critical intracellular glycosylation level and homeostasis. Homooligomer. Interacts with OGT. Interacts with GNB2. Interacts with IQCB1. Belongs to the ataxin-10 family.