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EC 2.4.2.64 Details
EC number
2.4.2.64
Accepted name
tRNA-guanosine34 queuine transglycosylase
Reaction
guanine34 in tRNA + queuine = queuine34 in tRNA + guanine
Other name(s)
QTRT1 (gene name),
QTRT2 (gene name),
TGT (ambiguous),
guanine insertion enzyme (ambiguous),
tRNA transglycosylase (ambiguous),
Q-insertase (ambiguous),
queuine34 transfer ribonucleate ribosyltransferase,
transfer ribonucleate glycosyltransferase (ambiguous),
tRNA guanine34 transglycosidase (ambiguous),
queuine tRNA-ribosyltransferase,
[tRNA]-guanine34:queuine tRNA-D-ribosyltransferase,
transfer ribonucleic acid guanine34 transglycosylase (ambiguous)
Systematic name
tRNA-guanosine34:queuine tRNA-D-ribosyltransferase
CAS registry number
72162-89-1
Comment
Certain prokaryotic and eukaryotic tRNAs contain the modified base queuine at position 34. In eukaryotes and a small number of prokaryotes queuine is salvaged and incorporated into tRNA directly via a base-exchange reaction, replacing guanine. cf. EC 2.4.2.29, tRNA-guanosine34 preQ1 transglycosylase.
History
created 2020 (EC 2.4.2.29 created 1984, modified 2007, modified 2012, part transferred 2020 to EC 2.4.2.64)
EC Tree
2.4.2.13 created 1961, deleted 1965