Term Name: | mRNA guanylyltransferase activity |
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Synonyms: | GTP--RNA guanylyltransferase activity, GTP:mRNA guanylyltransferase activity, messenger RNA guanylyltransferase activity, mRNA capping enzyme activity, protein lambda2 |
Definition: | Catalysis of the reaction: GTP + (5')pp-Pur-mRNA = diphosphate + G(5')ppp-Pur-mRNA; G(5')ppp-Pur-mRNA is mRNA containing a guanosine residue linked 5' through three phosphates to the 5' position of the terminal residue. |
Ontology: | GO: Molecular Function [GO:0004484] QuickGO AmiGO |