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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. Catalysis of the transfer of a nucleotidyl group to a reactant. Catalysis of the posttranscriptional addition of a guanyl residue to the 5' end of an RNA molecule. Catalysis of the posttranscriptional addition of a guanyl residue to the 5' end of a tRNA molecule; observed for His tRNAs. Catalysis of the transfer of a guanylyl group to an acceptor.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: RNA guanylyltransferase activity
Acc: GO:0008192
Aspect: Molecular Function
Desc: Catalysis of the posttranscriptional addition of a guanyl residue to the 5' end of an RNA molecule.
Proteins in PDR annotated with:
   This term: 0
   Term or descendants: 19 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0008192 - RNA guanylyltransferase activity (interactive image map)
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