Reaction catalyzed by RNA 3'-terminal-phosphate cyclase (GTP) (6.5.1.5)
+
[RNA 3\'-phosphate cyclase]-L-histidine
=
5\'-guanosyl [RNA 3\'-phosphate cyclase]-Ntau-phosphono-L-histidine
+
GTP
+
[RNA 3'-phosphate cyclase]-L-histidine
=
5'-guanosyl [RNA 3'-phosphate cyclase]-Ntau-phosphono-L-histidine
+
diphosphate
