tRNA-guanosine(34) queuine transglycosylase activity https://github.com/geneontology/go-ontology/issues/25797 https://github.com/geneontology/go-ontology/issues/30193 RHEA:78299 queuine tRNA-ribosyltransferase activity queuine tRNA-ribosyltransferase TGT guanine insertion enzyme GO:0008479 Reactome:R-HSA-6782443 Catalysis of the reaction: guanosine34 in tRNA + queuine = guanine + queuosine34 in tRNA. tRNA guanine transglycosylase Q-insertase MetaCyc:QUEUOSINE-TRNA-RIBOSYLTRANSFERASE-RXN tRNA transglycosylase tRNA-guanosine(34) queuine transglycosylase queuine(34) transfer ribonucleate ribosyltransferase RHEA:78303 molecular_function RHEA:16633 EC:2.4.2.64 eTGT pentosyltransferase activity catalytic activity, acting on a tRNA