Uroporphyrinogen III Synthetase

Cosynthetase, Uroporphyrinogen III; Isomerase, Uroporphyrinogen; Synthase, Uroporphyrinogen-III; Synthetase, Uroporphyrinogen III; Uroporphyrinogen III Synthase
An enzyme that catalyzes the cyclization of hydroxymethylbilane to yield UROPORPHYRINOGEN III and water. It is the fourth enzyme in the 8-enzyme biosynthetic pathway of HEME, and is encoded by UROS gene. Mutations of UROS gene result in CONGENITAL ERYTHROPOIETIC PORPHYRIA.