Term Name:	uroporphyrinogen-III synthase activity
Synonyms:	hydroxymethylbilane hydro-lyase (cyclizing) activity, hydroxymethylbilane hydro-lyase (cyclizing; uroporphyrinogen-III-forming), porphobilinogenase activity, URO-synthase activity, uroporphyrinogen III cosynthase activity, uroporphyrinogen isomerase activity, uroporphyrinogen-III cosynthase activity, uroporphyrinogen-III cosynthetase activity
Definition:	Catalysis of the reaction: hydroxymethylbilane = H2O + uroporphyrinogen III.
Ontology:	GO: Molecular Function [GO:0004852]    QuickGO    AmiGO