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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, METHODS, RESULTS. Meshes: Adult, Aged, Aged, 80 and over, Basal Ganglia Diseases, Cataract, Child, Female, Follow-Up Studies, Humans, Middle Aged, Mutation, Optic Atrophies, Hereditary, Pedigree, Proteins.
user
Is [ An OPA3 gene mutation responsible for the disease associating optic atrophy and cataract with extrapyramidal signs ]? Context: In 1961, Garcin et al. described a family with several members affected with optic atrophy associated with cataract, and neurological symptoms. The authors believed this condition to be distinct from other diseases known at that time, e.g. the Behr syndrome, Marinesco-Sjogren syndrome and Friedreich's ataxia. This family was followed over a period of 40 years and genes known to be responsible for optic atrophy were sequenced. The G277A mutation of OPA3 gene was responsible for this familial disease.
assistant
A new clinical entity is identified: autosomal dominant optic atrophy and cataract, due to a heterozygous mutation of the OPA3 gene, a nuclear gene encoding a mitochondrial protein. Final Decision: yes