Term Name:	uroporphyrin-III C-methyltransferase activity
Synonyms:	adenosylmethionine-uroporphyrinogen III methyltransferase activity, CobA, CysG, S-adenosyl-L-methionine-dependent uroporphyrinogen III methylase activity, S-adenosyl-L-methionine:uroporphyrin-III C-methyltransferase activity, S-adenosyl-L-methionine:uroporphyrinogen-III C-methyltransferase activity, SirA, SUMT activity, urogen III methylase activity, uroporphyrinogen III methylase activity, uroporphyrinogen methyltransferase activity, uroporphyrinogen-III C-methyltransferase activity, uroporphyrinogen-III methylase activity, uroporphyrinogen-III methyltransferase activity
Definition:	Catalysis of the reaction: 2 S-adenosyl-L-methionine + uroporphyrin III = 2 S-adenosyl-L-homocysteine + precorrin-2.
Ontology:	GO: Molecular Function [GO:0004851]    QuickGO    AmiGO