5-Oxoprolinase deficiency is clinically a very heterogeneous condition characterized by 5-oxoprolinuria. The disease is 5-oxoprolinase deficiency (MONDO_0009825). Also known as: 5-oxoprolinase deficiency (disease), inborn 5-oxoprolinase (ATP-hydrolyzing) activity disorder, inborn error of 5-oxoprolinase (ATP-hydrolyzing) activity, oxoprolinuria due to oxoprolinase deficiency, rare inborn error of 5-oxoprolinase (ATP-hydrolyzing) activity.