OBO ID: GO:0004418

Term Name:	hydroxymethylbilane synthase activity		Search Ontology:
Synonyms:	(4-(2-carboxyethyl)-3-(carboxymethyl)pyrrol-2-yl)methyltransferase (hydrolyzing) activity (4-[2-carboxyethyl]-3-[carboxymethyl]pyrrol-2-yl)methyltransferase (hydrolysing) HMB-synthase activity porphobilinogen ammonia-lyase (polymerizing) porphobilinogen deaminase activity porphobilinogen:(4-[2-carboxyethyl]-3-[carboxymethyl]pyrrol-2-yl)methyltransferase (hydrolysing) pre-uroporphyrinogen synthase activity uroporphyrinogen I synthase activity uroporphyrinogen I synthetase activity uroporphyrinogen synthase activity uroporphyrinogen synthetase activity
Definition:	Catalysis of the reaction: H2O + 4 porphobilinogen = hydroxymethylbilane + 4 NH4. 2.5.1.61
References:	EC:2.5.1.61 KEGG_REACTION:R00084 MetaCyc:OHMETHYLBILANESYN-RXN RHEA:13185 Reactome:R-HSA-189406
Ontology:	GO: Molecular Function    QuickGO    AmiGO