7-methylguanosine cap hypermethylation

Term ID

GO:0036261

Synonyms

• 2,2,7-trimethylguanosine cap formation
• conversion of m(7)G to m(3)G
• hypermethylation of snoRNA cap
• hypermethylation of snRNA cap
• m(7)G cap hypermethylation
• snoRNA capping
• snRNA capping
• TMG cap formation

Definition

Hypermethylation of the 7-(mono)methylguanosine (m(7)G) cap structure at the 2' position of the guanosine residue to convert a mono-methylated cap to a 2,2,7-trimethylguanosine cap structure. This type of cap modification occurs on small nuclear RNAs (snRNAs) and small nucleolar RNAs (snoRNAs) and is dependent on prior guanine-N7 methylation. (2)

References

Ontology

GO: Biological Process    QuickGO    AmiGO