The Enzyme Database

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Accepted name: epoxyqueuosine reductase
Reaction: queuosine34 in tRNA + acceptor + H2O = epoxyqueuosine34 in tRNA + reduced acceptor
For diagram of queuine biosynthesis, click here
Glossary: queuine = base Q = 2-amino-5-({[(1S,4S,5R)-4,5-dihydroxycyclopent-2-en-1-yl]amino}methyl)-1,7-dihydropyrrolo[3,2-e]pyrimidin-4-one
epoxyqueine = base oQ
Other name(s): oQ reductase; queG (gene name); queH (gene name)
Systematic name: queuosine34 in tRNA:acceptor oxidoreductase
Comments: This enzyme catalyses the last step in the bacterial biosynthetic pathway to queuosine, the modified guanosine base in the wobble position in tRNAs specific for Tyr, His, Asp or Asn.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Miles, Z.D., McCarty, R.M., Molnar, G. and Bandarian, V. Discovery of epoxyqueuosine (oQ) reductase reveals parallels between halorespiration and tRNA modification. Proc. Natl. Acad. Sci. USA 108 (2011) 7368–7372. [DOI] [PMID: 21502530]
2.  Zallot, R., Ross, R., Chen, W.H., Bruner, S.D., Limbach, P.A. and De Crecy-Lagard, V. Identification of a novel epoxyqueuosine reductase family by comparative genomics. LID - 10.1021/acschembio.6b01100 [doi. ACS Chem. Biol. (2017) . [DOI] [PMID: 28128549]
[EC created 2014]

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