>pfam01207 Dus Dihydrouridine synthase (Dus). Members of this family catalyse the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archae. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. Dus 1 from Saccharomyces cerevisiae acts on pre-tRNA-Phe, while Dus 2 acts on pre-tRNA-Tyr and pre-tRNA-Leu. Dus 1 is active as a single subunit, requiring NADPH or NADH, and is stimulated by the presence of FAD. Some family members may be targeted to the mitochondria and even have a role in mitochondria.

Probab=100.00 E-value=0 Score=600.30 Aligned_cols=300 Identities=29% Similarity=0.469 Sum_probs=272.0 Q ss_pred CCCCCCHHHHHHHHHHCCCEEEECCCCCCHHHHCCCHHH--HHHCCCCCCCEEEEEECCCHHHHHHHHHHHHCCCCCEEE Q ss_conf 977860789999998289829981703324776089789--830274578469998269989999988753104537774 Q gi|254781167|r 1 MVDWTDRHYRFFARLLTNNALLYTEMIVADAILRGDKKN--ILGFSTQEKPLALQIGGADISKLVEAAKIVEDFGYNEIN 78 (322) Q Consensus 1 Mag~Td~~fR~l~r~~~~~~~~~TEmi~a~~l~~~~~~~--~~~~~~~e~p~~~Ql~g~~p~~~~~aa~~~~~~g~~~id 78 (322) T Consensus 5 M~g~td~~fR~l~~~~g~~~l~~TEmv~a~~l~~~~~~~~~~~~~~~~e~P~~~Ql~G~dp~~~~~aa~~~~~~g~d~ID 84 (309) T pfam01207 5 MAGVTDLPFRRLVREYGAGDLVVTEMVTAKAQLRPEKQRELMLPELEEPTPLAVQLGGSDPALLAEAAKLVADLGADIID 84 (309) T ss_pred CCCCCCHHHHHHHHHHCCCCEEEECCEEEHHHHCCCHHHHHHCCCCCCCCCEEEEEECCCHHHHHHHHHHHHHCCCCEEE T ss_conf 89990799999999979592999798997135438875887420076789728999369999999999998863999896 Q ss_pred ECCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCEEEEEEEECCCCCCCCCCCHHHHHHHHCCCCCCHHHHHHHHH Q ss_conf 42564136776668899998558999999999850279069998611345665322014554320001220121001356 Q gi|254781167|r 79 LNVGCPSARVHEGSFGACLMLNPDIVGDCIAAMCKALSIPVTVKCRIGVDDQIPAVALRNLVKSIKKSGVNGIWIHARKA 158 (322) Q Consensus 79 lN~GCP~~~v~~~g~GaaLl~~p~~~~~iv~~~~~~~~~pvsvK~RlG~~~~~~~~~~~~~~~~~~~~g~~~itiH~Rt~ 158 (322) T Consensus 85 lN~GCP~~~v~~~g~GsaLl~~p~~~~~iv~a~~~~~~~PVtvK~RlG~d~--~~~~~~~~~~~l~~~G~~~itvH~Rt- 161 (309) T pfam01207 85 INMGCPAKKVTRGGAGAALLRDPDLVAQIVKAVVKAVDIPVTVKIRIGWDE--SHENAVEIARRVEDAGAQALTVHGRT- 161 (309) T ss_pred EECCCCHHHHCCCCCCEEHHHCHHHHHHHHHHHHHHCCCCEEEEEECCCCC--CHHHHHHHHHHHHHCCCCEEEEECCC- T ss_conf 518999999878997762541778999999999975588546754337887--63889999999984688879996763- Q ss_pred HHHCCCCCCCCCCCCCHHHHHHHHHHHCCCCCCCCCCCCCCHHHHHHHH--HCCCCEEEECCCCCHHHHHHHHHHHHCCC Q ss_conf 6402577421227661046787666738875302577778998988874--20352344122000124399999987199 Q gi|254781167|r 159 ILKGLSPKDNRKIPNLDYDIVYEIKKENPDLFIGLNGGLEDMSQALKIL--PSVDGVMIGRAAYKNSAMLTTVDEYFSNP 236 (322) Q Consensus 159 ~~~g~s~~~~~~~~~~~~~~i~~l~~~~~~~~i~~NGdi~~~~~a~~~l--~~~dgvMigRga~~~P~if~~I~~~l~~~ 236 (322) T Consensus 162 -------~~q~~~g~a~w~~i~~~k~~~~-ipvi~NGdi~~~~d~~~~l~~tg~dgvMigRga~~nPwif~~~~~~~~~~ 233 (309) T pfam01207 162 -------RAQNYEGPADWDAIKQVKQAVS-IPVIANGDITDAEDAQRCLSYTGADGVMIGRGALGNPWLFAEQHTVKTGE 233 (309) T ss_pred -------HHHCCCCCCCHHHHHHHHHHCC-CCEEEECCCCCHHHHHHHHHHHCCCEEEECHHHHHCCHHHHHHHHHHCCC T ss_conf -------2402678654189999998589-82898089488999999986109999998489774988889889997399 Q ss_pred CCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHCCCCCHHHHHHHHHHHCCCCCHHHHHHHHHHH Q ss_conf 88889998899999999999999999999852287679989989998738999899999998621781106999999999 Q gi|254781167|r 237 LTGSSPIKTRVDKDFWRKISASMTDYAARHLHSGGKLQQITRHMIGLFHGFPNSRRCRHILTVEAGASTATHHIIETAFN 316 (322) Q Consensus 237 ~~~~~p~~~~~~~~~~~~i~~~~~~y~~~~~~~~~~i~~irKhl~~y~kGlpgak~~R~~Ls~~~~~~~~~~~iie~~~~ 316 (322) T Consensus 234 ~~-~~~~~~e-----~~~~~~~~~~~~~~~~g~~~~~~~~rk~~~~y~kg~~ga~~~R~~l~-~~~~~~e~~~~le~~l~ 306 (309) T pfam01207 234 FD-PRPPLAE-----EAEIVLEHLSYLEEFYGEDKGLRHARKHLAWYLKGFPGAAELRRELN-DVFDPTEALINLDAALR 306 (309) T ss_pred CC-CCCCHHH-----HHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHCCCCCHHHHHHHHH-CCCCHHHHHHHHHHHHH T ss_conf 78-9998689-----99999999999999875898699999999999779978899999983-69999999999999998 Q ss_pred HH Q ss_conf 86 Q gi|254781167|r 317 LM 318 (322) Q Consensus 317 ~l 318 (322) T Consensus 307 ~~ 308 (309) T pfam01207 307 AA 308 (309) T ss_pred HC T ss_conf 51

HHsearch alignment for GI: 254781167 and conserved domain: pfam01207