>cd04694 Nudix_Hydrolase_35 Members of the Nudix hydrolase superfamily catalyze the hydrolysis of NUcleoside DIphosphates linked to other moieties, X. Enzymes belonging to this superfamily require a divalent cation, such as Mg2+ or Mn2+, for their activity and contain a highly conserved 23-residue nudix motif (GX5EX7REUXEEXGU, where U = I, L or V), which functions as a metal binding and catalytic site. Substrates of nudix hydrolases include intact and oxidatively damaged nucleoside triphosphates, dinucleoside polyphosphates, nucleotide-sugars and dinucleotide enzymes. These substrates are metabolites or cell signaling molecules that require regulation during different stages of the cell cycle or during periods of stress. In general, the role of the nudix hydrolase is to sanitize the nucleotide pools and to maintain cell viability, thereby serving as surveillance & "house-cleaning" enzymes. Substrate specificity is used to define families within the superfamily. Differences in substrate

Probab=99.85 E-value=7.2e-21 Score=140.73 Aligned_cols=109 Identities=27% Similarity=0.373 Sum_probs=81.8 Q ss_pred EEEEEEECCCEEEEEEECCC-CCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCEE--EEEEEECCC------ Q ss_conf 99999935986999991789-888983822573101787488999988887626520244202--556652057------ Q gi|254780325|r 13 VACAVFEPGGKVLLSCRPKD-KSHGEFWEFPGGKIEDGETPEEALTRELFEELAIVVKPFSLV--PLTFISHPY------ 83 (141) Q Consensus 13 v~~~ii~~~~~iLl~~R~~~-~~~~g~W~lPGG~ve~gEs~~~a~~REv~EEtgi~~~~~~~~--~~~~~~~~~------ 83 (141) T Consensus 4 Va~ii~d~dgrvLL~rRs~~~~~~Pg~W~~PGG~ve~GEt~~eaa~REl~EEtGL~v~p~~~~~~~l~l~EsvyP~~l~~ 83 (143) T cd04694 4 VAVLLQSSDQKLLLTRRASSLRIFPNVWVPPGGHVELGENLLEAGLRELNEETGLTLDPIDKSWQVLGLWESVYPPLLSR 83 (143) T ss_pred EEEEEECCCCEEEEEEECCCCCCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCCCCHHCCCEEEEEEEECCCCCCCC T ss_conf 99999989992999985898889998171887745899898999999998976763470112212446876307740145 Q ss_pred --CCCEEEEEEEEEEEECCE--------ECCCHHHEEEECCHHHHCCC Q ss_conf --886069999999975483--------76882331570277883248 Q gi|254780325|r 84 --EKFHLLMPFFVCHCFEGI--------PQSCEGQQLQWVALDDLQNY 121 (141) Q Consensus 84 --~~~~~~~~~~~~~~~~~~--------~~~~E~~~~~Wi~~~el~~~ 121 (141) T Consensus 84 glP~~HhIviy~~~~~~~~~~~~q~~l~~~~~ev~~~~Wl~~~~~~~~ 131 (143) T cd04694 84 GLPKRHHIVVYILVKSSETHQQLQARLQPDPNEVSAAAWLDKSLAKAV 131 (143) T ss_pred CCCCCEEEEEEEEEEECCCHHHHHCCCCCCHHHCCEEEECCHHHHHHH T ss_conf 887633899999998366034220123789667642485189999999

HHsearch alignment for GI: 254780325 and conserved domain: cd04694