>cd04699 Nudix_Hydrolase_39 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=99.96 E-value=4.4e-28 Score=182.33 Aligned_cols=121 Identities=32% Similarity=0.602 Sum_probs=101.7 Q ss_pred EEEEEEEEECCCEEEEEEECCC-CCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCEEEEEEEECCCCCCEEE Q ss_conf 9999999935986999991789-888983822573101787488999988887626520244202556652057886069 Q gi|254780325|r 11 LVVACAVFEPGGKVLLSCRPKD-KSHGEFWEFPGGKIEDGETPEEALTRELFEELAIVVKPFSLVPLTFISHPYEKFHLL 89 (141) Q Consensus 11 ~vv~~~ii~~~~~iLl~~R~~~-~~~~g~W~lPGG~ve~gEs~~~a~~REv~EEtgi~~~~~~~~~~~~~~~~~~~~~~~ 89 (141) T Consensus 2 v~V~~~I~~~~g~vLl~kR~~~~~~~~G~W~~PGG~ie~gEt~~~aa~REl~EEtGl~v~~~~~~~~~~~~~~~~~~~~~ 81 (129) T cd04699 2 VAVAALIVKDVGRILILKRSKDERTAPGKWELPGGKVEEGETFEEALKREVYEETGLTVTPFLRYPSTVTHEDSGVYNVI 81 (129) T ss_pred EEEEEEEEECCCEEEEEEECCCCCCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCEEEEEEEEEEEEEECCCCCEEEE T ss_conf 89999999899989999808999999981889805065998999999999999879577876887699997279950899 Q ss_pred EEEEEEEEECCEECC-CHHHEEEECCHHHHCCCCC---CCCCHHHH Q ss_conf 999999975483768-8233157027788324889---73698999 Q gi|254780325|r 90 MPFFVCHCFEGIPQS-CEGQQLQWVALDDLQNYSM---LPADLSLI 131 (141) Q Consensus 90 ~~~~~~~~~~~~~~~-~E~~~~~Wi~~~el~~~~~---~~~~~~ii 131 (141) T Consensus 82 ~~~f~~~~~~~~~~~~~E~~e~~Wv~~eeL~~L~~d~~~~~~~~~~ 127 (129) T cd04699 82 YLVFVCEALSGAVKLSDEHEEYAWVTLEELAILKADILFEPSKIFL 127 (129) T ss_pred EEEEEEEECCCCCCCCCCCEEEEEEEHHHHHHCCCCCCCCCHHHHH T ss_conf 9999986248868788652066998489975487975655206652

HHsearch alignment for GI: 254780325 and conserved domain: cd04699