>cd04676 Nudix_Hydrolase_17 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=99.93 E-value=4.4e-25 Score=165.02 Aligned_cols=119 Identities=29% Similarity=0.417 Sum_probs=95.7 Q ss_pred EEEEEEEEEECCCEEEEEEECCCCCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCEEEEEEEEC---CCC-- Q ss_conf 999999999359869999917898889838225731017874889999888876265202442025566520---578-- Q gi|254780325|r 10 LLVVACAVFEPGGKVLLSCRPKDKSHGEFWEFPGGKIEDGETPEEALTRELFEELAIVVKPFSLVPLTFISH---PYE-- 84 (141) Q Consensus 10 ~~vv~~~ii~~~~~iLl~~R~~~~~~~g~W~lPGG~ve~gEs~~~a~~REv~EEtgi~~~~~~~~~~~~~~~---~~~-- 84 (141) T Consensus 2 ~~gv~~vv~~~~g~vLL~~r~~----~g~W~lPGG~ve~GE~~~~aa~RE~~EEtGl~v~~~~~~~~~~~~~~~~~~~~~ 77 (129) T cd04676 2 LPGVTAVVRDDEGRVLLIRRSD----NGLWALPGGAVEPGESPADTAVREVREETGLDVEVTGLVGIYTGPVHVVTYPNG 77 (129) T ss_pred CCEEEEEEEECCCEEEEEEECC----CCEEECCCCEECCCCCHHHHHHHHHHHHHCCEEEEEEEEEEECCCCCCEECCCC T ss_conf 4779999997998099999869----996989925741998989988899999769577872799997264421627999 Q ss_pred -CCEEEEEEEEEEEECCEECC--CHHHEEEECCHHHHCCCCCCCCCHHHHH Q ss_conf -86069999999975483768--8233157027788324889736989999 Q gi|254780325|r 85 -KFHLLMPFFVCHCFEGIPQS--CEGQQLQWVALDDLQNYSMLPADLSLIS 132 (141) Q Consensus 85 -~~~~~~~~~~~~~~~~~~~~--~E~~~~~Wi~~~el~~~~~~~~~~~ii~ 132 (141) T Consensus 78 ~~~~~~~~~f~~~~~~~~~~~~~~E~~e~~Wf~~delp~l~~~p~~R~~i~ 128 (129) T cd04676 78 DVRQYLDITFRCRVVGGELRVGDDESLDVAWFDPDGLPPLLMHPSMRLRID 128 (129) T ss_pred CEEEEEEEEEEEEEECCCCCCCCCCEEEEEEECHHHCCCCCCCCCCHHHCC T ss_conf 869999999998872884559997178889989989969999945043337

HHsearch alignment for GI: 254780325 and conserved domain: cd04676