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. Interacts with GNB2 (By similarity). Homooligomer. Interacts with OGT in the brain. Interacts with IQCB1 (By similarity). Ubiquitous distribution. Markedly increased expression in testis, adrenals, and brain. Belongs to the ataxin-10 family.