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 multiple mitochondrial dysfunctions syndrome that is characterized by loss of previously acquired developmental milestones in the first months or years of life, and has_material_basis_in autosomal recessive inheritance of homozygous mutation in the iron-sulfur cluster assembly factor IBA57 gene on chromosome 1q42. (DO)