mRNA guanylyltransferase activity
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.
GO:0008192
RNA guanylyltransferase activity
is_a
GTP--RNA guanylyltransferase activity
related
GTP:mRNA guanylyltransferase activity
exact
mRNA capping enzyme activity
related
messenger RNA guanylyltransferase activity
related
protein lambda2
related
SPBC2F12.08c