Any autosomal dominant spastic ataxia in which the cause of the disease is a mutation in the VAMP1 gene. The disease is spastic ataxia 1 (Monarch Disease Ontology term MONDO_0007164). Also known as: SPAX1, VAMP1 autosomal dominant spastic ataxia, autosomal dominant spastic ataxia caused by mutation in VAMP1, spastic ataxia type 1.