Mondo Description Any mitochondrial complex III deficiency in which the cause of the disease is a mutation in the BCS1L gene.

Uniprot Description A disorder of the mitochondrial respiratory chain resulting in a highly variable phenotype depending on which tissues are affected. Clinical features include mitochondrial encephalopathy, psychomotor retardation, ataxia, severe failure to thrive, liver dysfunction, renal tubulopathy, muscle weakness and exercise intolerance.

Disease Ontology Description A mitochondrial complex III deficiency characterized by onset at birth of lactic acidosis, hypotonia, hypoglycemia, failure to thrive, encephalopathy, and delayed psychomotor development and that has_material_basis_in homozygous or compound heterozygous mutation in the nuclear-encoded BCS1L gene on chromosome 2q35.