mRNA guanylyltransferase activity

Term ID

GO:0004484

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. 2.7.7.50

References

• EC:2.7.7.50
• MetaCyc:MRNA-GUANYLYLTRANSFERASE-RXN
• RHEA:54592
• Reactome:R-HSA-77081
• Reactome:R-HSA-77083
• Reactome:R-HSA-9815529

Ontology

GO: Molecular Function    QuickGO    AmiGO