. "\"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.\" [EC:2.7.7.50]" . . "mRNA guanylyltransferase activity" . "GTP--RNA guanylyltransferase activity" . "GTP:mRNA guanylyltransferase activity" . "messenger RNA guanylyltransferase activity" . "EC:2.7.7.50" . "MetaCyc:MRNA-GUANYLYLTRANSFERASE-RXN" . "Reactome:REACT_101635 \"Formation of the CE:GMP intermediate complex, Arabidopsis thaliana\"" . "Reactome:REACT_102473 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Arabidopsis thaliana\"" . "Reactome:REACT_103446 \"Formation of the CE:GMP intermediate complex, Schizosaccharomyces pombe\"" . "Reactome:REACT_103482 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Oryza sativa\"" . "Reactome:REACT_107547 \"Formation of the CE:GMP intermediate complex, Xenopus tropicalis\"" . "Reactome:REACT_108251 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Canis familiaris\"" . "Reactome:REACT_110689 \"Formation of the CE:GMP intermediate complex, Oryza sativa\"" . "Reactome:REACT_1580 \"Formation of the CE:GMP intermediate complex, Homo sapiens\"" . "Reactome:REACT_1968 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Homo sapiens\"" . "Reactome:REACT_32228 \"Formation of the CE:GMP intermediate complex, Mus musculus\"" . "Reactome:REACT_36269 \"Formation of the CE:GMP intermediate complex, Bos taurus\"" . "Reactome:REACT_77279 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Drosophila melanogaster\"" . "Reactome:REACT_79193 \"Formation of the CE:GMP intermediate complex, Caenorhabditis elegans\"" . "Reactome:REACT_79495 \"Formation of the CE:GMP intermediate complex, Danio rerio\"" . "Reactome:REACT_80509 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Dictyostelium discoideum\"" . "Reactome:REACT_82511 \"Formation of the CE:GMP intermediate complex, Rattus norvegicus\"" . "Reactome:REACT_83926 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Gallus gallus\"" . "Reactome:REACT_86486 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Schizosaccharomyces pombe\"" . "Reactome:REACT_86857 \"Formation of the CE:GMP intermediate complex, Gallus gallus\"" . "Reactome:REACT_88083 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Saccharomyces cerevisiae\"" . "Reactome:REACT_88699 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Bos taurus\"" . "Reactome:REACT_89040 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Mus musculus\"" . "Reactome:REACT_90576 \"Formation of the CE:GMP intermediate complex, Canis familiaris\"" . "Reactome:REACT_90910 \"Formation of the CE:GMP intermediate complex, Saccharomyces cerevisiae\"" . "Reactome:REACT_92552 \"Formation of the CE:GMP intermediate complex, Drosophila melanogaster\"" . "Reactome:REACT_93206 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Rattus norvegicus\"" . "Reactome:REACT_93667 \"Formation of the CE:GMP intermediate complex, Dictyostelium discoideum\"" . "Reactome:REACT_93676 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Danio rerio\"" . "Reactome:REACT_95548 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Caenorhabditis elegans\"" . "Reactome:REACT_97427 \"Transfer of GMP from the capping enzyme GT site to 5'-end of mRNA, Xenopus tropicalis\"" . . "mRNA capping enzyme activity" . "protein lambda2" .