Term Name:	RNA cap trimethylguanosine synthase activity
Synonyms:	cap hypermethylase activity, RNA trimethylguanosine synthase activity, small nuclear RNA methyltransferase activity, snRNA methyltransferase activity
Definition:	Catalysis of two successive methyl transfer reactions from AdoMet to the N-2 atom of guanosine, thereby converting 7-methylguanosine in an RNA cap to 2,2,7 trimethylguanosine.
Ontology:	GO: Molecular Function [GO:0071164]    QuickGO    AmiGO