>cd04681 Nudix_Hydrolase_22 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=99.94 E-value=4.2e-26 Score=170.87 Aligned_cols=121 Identities=26% Similarity=0.422 Sum_probs=92.3 Q ss_pred EEEEEEEECCCEEEEEEECCCCCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCEEEEEEEECCCCCC--EEE Q ss_conf 999999935986999991789888983822573101787488999988887626520244202556652057886--069 Q gi|254780325|r 12 VVACAVFEPGGKVLLSCRPKDKSHGEFWEFPGGKIEDGETPEEALTRELFEELAIVVKPFSLVPLTFISHPYEKF--HLL 89 (141) Q Consensus 12 vv~~~ii~~~~~iLl~~R~~~~~~~g~W~lPGG~ve~gEs~~~a~~REv~EEtgi~~~~~~~~~~~~~~~~~~~~--~~~ 89 (141) T Consensus 3 aV~~vI~~~~g~vLl~kR~~~~-~~g~W~lPGG~ve~gEt~~~aa~REl~EEtGl~v~~~~~~~~~~~~~~~~~~~~~~~ 81 (130) T cd04681 3 AVGVLILNEDGELLVVRRAREP-GKGTLDLPGGFVDPGESAEEALIREIREETGLKVTELSYLFSLPNTYPYGGMEYDTL 81 (130) T ss_pred EEEEEEEECCCEEEEEEECCCC-CCCCEECCEEECCCCCCHHHHHHHHHHHHHCCEEEEEEEEEEECCCCCCCCEEEEEE T ss_conf 7999999689999999968998-899092988206599999999989999986954688689999764554698238999 Q ss_pred EEEEEEEEECCE--ECCCHHHEEEECCHHHHCCCCC-CCCCHHHHHH Q ss_conf 999999975483--7688233157027788324889-7369899999 Q gi|254780325|r 90 MPFFVCHCFEGI--PQSCEGQQLQWVALDDLQNYSM-LPADLSLISF 133 (141) Q Consensus 90 ~~~~~~~~~~~~--~~~~E~~~~~Wi~~~el~~~~~-~~~~~~ii~~ 133 (141) T Consensus 82 ~~~~~~~~~~~~~~~~~~E~~e~~W~~~~el~~~~~afp~~~~~i~~ 128 (130) T cd04681 82 DLFFVCQVDDKPIVKAPDDVAELKWVVPQDIELENFAFPSIRQAVER 128 (130) T ss_pred EEEEEEEECCCCCCCCCCCEEEEEEECHHHCCHHHCCCHHHHHHHHH T ss_conf 99999998798747999825168998687897102598669999998

HHsearch alignment for GI: 254780325 and conserved domain: cd04681