Term Name:	snoRNA 2,2,7-trimethylguanosine (TMG) capping
Synonyms:	snoRNA 2,2,7-trimethylguanosine (TMG) cap formation
Definition:	The sequence of enzymatic reactions by which a 2,2,7-trimethylguanosine cap structure is added to the 5' end of an snoRNA. The snoRNA capping includes the formation of 7-methyl-G caps found on all RNA polymerase II transcripts, followed by hypermethylation at the 2' position of the guanosine residue to convert a mono-methylated cap to a 2,2,7-trimethylguanosine cap structure. Note that the pol III transcribed snoRNAs are also TMG capped.
Ontology:	GO: Biological Process [GO:0180031]    QuickGO    AmiGO