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 nephrogenic diabetes insipidus that is characterized by the inability of the renal collecting ducts to absorb water in response to antidiuretic hormone and that has_material_basis_in heterozygous, homozygous, or compound heterozygous mutation in the gene encoding the aquaporin-2 water channel (AQP2), which maps to chromosome 12q13. (DO)