ID 1.17.99.6 DE epoxyqueuosine reductase. AN oQ reductase. CA AH2 + epoxyqueuosine(34) in tRNA = A + H2O + queuosine(34) in tRNA. CC -!- This enzyme catalyzes the last step in the bacterial biosynthetic CC pathway to queuosine, the modified guanosine base in the wobble CC position in tRNAs specific for Tyr, His, Asp or Asn. CC -!- Two types of enzymes are known to catalyze this activity. CC -!- QueG enzymes are cobalamin-dependent, while QueH enzymes contain a CC [4Fe-4S] metallocluster along with an adjacent coordinated iron CC metal. DR F4G4E2, QUEG_ALIDK ; Q5E2C3, QUEG_ALIF1 ; D3ENT3, QUEG_ATETH ; DR Q81YT7, QUEG_BACAN ; Q81I72, QUEG_BACCR ; P97030, QUEG_BACSU ; DR Q63WN0, QUEG_BURPS ; E6X4P3, QUEG_CELAD ; G0J2F8, QUEG_CYCMS ; DR P39288, QUEG_ECOLI ; Q834R1, QUEG_ENTFA ; A6H1G2, QUEG_FLAPJ ; DR F4BEN2, QUEG_FRACF ; Q7NKL3, QUEG_GLOVI ; F9VEN7, QUEG_LACGL ; DR E4RUV9, QUEG_LEAB4 ; Q8Y8H0, QUEG_LISMO ; Q46I55, QUEG_PROMT ; DR Q9HUL4, QUEG_PSEAE ; F7ZDR3, QUEG_ROSLO ; Q8ZKA8, QUEG_SALTY ; DR Q8EAN7, QUEG_SHEON ; Q328E3, QUEG_SHIDS ; Q2FX88, QUEG_STAA8 ; DR A5GPV1, QUEG_SYNR3 ; Q3ANP3, QUEG_SYNSC ; P73526, QUEG_SYNY3 ; DR Q8DLA9, QUEG_THEVB ; Q9KV16, QUEG_VIBCH ; Q8P8E0, QUEG_XANCP ; DR Q7CKM4, QUEG_YERPE ; Q6FAK7, QUEH_ACIAD ; Q7VYQ1, QUEH_BORPE ; DR Q3Z8V0, QUEH_DEHM1 ; P44068, QUEH_HAEIN ; O24926, QUEH_HELPY ; DR Q0I1Q0, QUEH_HISS1 ; A0A0H3JUG6, QUEH_STAAM ; A0A0H2VKG8, QUEH_STAES ; DR Q9A1K3, QUEH_STRP1 ; Q9WZJ0, QUEH_THEMA ; //