>cd04687 Nudix_Hydrolase_28 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=99.91 E-value=8.5e-24 Score=157.60 Aligned_cols=113 Identities=30% Similarity=0.426 Sum_probs=89.5 Q ss_pred EEEEEEEECCCEEEEEEECCCCCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCEEEEEEEE------CCCCC Q ss_conf 999999935986999991789888983822573101787488999988887626520244202556652------05788 Q gi|254780325|r 12 VVACAVFEPGGKVLLSCRPKDKSHGEFWEFPGGKIEDGETPEEALTRELFEELAIVVKPFSLVPLTFIS------HPYEK 85 (141) Q Consensus 12 vv~~~ii~~~~~iLl~~R~~~~~~~g~W~lPGG~ve~gEs~~~a~~REv~EEtgi~~~~~~~~~~~~~~------~~~~~ 85 (141) T Consensus 2 ~~a~AvI~~~~~vLL~r~~~~~--~~~w~lPGG~ve~GEt~~~Al~RE~~EEtGl~v~v~~l~~v~e~~~~~~~~~~~~~ 79 (128) T cd04687 2 NSAKAVIIKNDKILLIKHHDDG--GVWYILPGGGQEPGETLEDAAHRECKEEIGIDVEIGPLLFVREYIGHNPTSELPGH 79 (128) T ss_pred CEEEEEEEECCEEEEEEECCCC--CCEEECCCCCCCCCCCHHHHHHHHHHHHHCCEEEECCEEEEEEECCCCCCCCCCCC T ss_conf 4799999989999999983699--81698988667699799999999887863967885608999970132556678885 Q ss_pred CEEEEEEEEEEEECCEECCC------HHHEEEECCHHHHCCCCCCCC Q ss_conf 60699999999754837688------233157027788324889736 Q gi|254780325|r 86 FHLLMPFFVCHCFEGIPQSC------EGQQLQWVALDDLQNYSMLPA 126 (141) Q Consensus 86 ~~~~~~~~~~~~~~~~~~~~------E~~~~~Wi~~~el~~~~~~~~ 126 (141) T Consensus 80 ~h~v~~~f~~~~~~g~~~~~~~~~d~~~~~~~Wv~ldeL~~~~l~P~ 126 (128) T cd04687 80 FHQVELMFECKIKSGTPAKTPSKPDPNQIGVEWLKLKELGDIPLYPS 126 (128) T ss_pred EEEEEEEEEEEECCCCCCCCCCCCCCCEEEEEEECHHHHCCCCCCCC T ss_conf 49999999999868954667778876657899804999566988998

HHsearch alignment for GI: 254780325 and conserved domain: cd04687