DRP-4 belongs to the hydantoinase/dihydropyrimidase subfamily. It is required for signalling by class 3 semaphorins and remodelling of the cytoskeleton. It also plays a role in axon guidance, neuronal growth cone collapse and cell migration. It exists as homotetramer and a heterotetramer. Antibodies against post-translationally modified DPR-4 are present in sera from patients with paraneoplastic neurological diseases.