RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A combined oxidative phosphorylation deficiency characterized by infantile onset, lactic acidemia, hypotonia, respiratory chain complex II and III deficiency, and multisystem organ failure that has_material_basis_in homozygous mutation in the NFS1 gene on chromosome 20q11. (DO)