>cd04686 Nudix_Hydrolase_27 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=99.76 E-value=7.2e-18 Score=123.43 Aligned_cols=105 Identities=25% Similarity=0.393 Sum_probs=74.4 Q ss_pred EEEEEEECCCEEEEEEECCCCCCCCCEECCCCCCCCCCCHHHHHHHHHHHHHCCC-CCCCCEEEEEEEE--CCCC---CC Q ss_conf 9999993598699999178988898382257310178748899998888762652-0244202556652--0578---86 Q gi|254780325|r 13 VACAVFEPGGKVLLSCRPKDKSHGEFWEFPGGKIEDGETPEEALTRELFEELAIV-VKPFSLVPLTFIS--HPYE---KF 86 (141) Q Consensus 13 v~~~ii~~~~~iLl~~R~~~~~~~g~W~lPGG~ve~gEs~~~a~~REv~EEtgi~-~~~~~~~~~~~~~--~~~~---~~ 86 (141) T Consensus 2 avraIi~~~~kiLL~~~~~~----~~~~lPGG~ve~gE~~~~al~RE~~EETG~~~i~~~~~~G~~~E~r~~~~~~~~~~ 77 (131) T cd04686 2 AVRAIILQGDKILLLYTKRY----GDYKFPGGGVEKGEDHIEGLIRELQEETGATNIRVIEKFGTYTERRPWRKPDADIF 77 (131) T ss_pred CEEEEEEECCEEEEEEECCC----CCEECCCCCCCCCCCHHHHHHHHHHHHHCCCEEECCCCEEEEEEEEEEECCCCCEE T ss_conf 48999998999999997699----96767877378998989999999998749610131311455999841005888779 Q ss_pred EEEEEEEEEEEECC--EECCC--H---HHEEEECCHHHHCCC Q ss_conf 06999999997548--37688--2---331570277883248 Q gi|254780325|r 87 HLLMPFFVCHCFEG--IPQSC--E---GQQLQWVALDDLQNY 121 (141) Q Consensus 87 ~~~~~~~~~~~~~~--~~~~~--E---~~~~~Wi~~~el~~~ 121 (141) T Consensus 78 ~m~s~~Y~C~v~~~~g~~~le~~E~~~G~~pvWv~i~eAi~~ 119 (131) T cd04686 78 HMISYYYLCEVDAELGAQQLEDYEAELGMKPIWINIHEAIEH 119 (131) T ss_pred EEEEEEEEEEECHHCCCCCCCCHHHHCCCCEEECCHHHHHHH T ss_conf 898789999851221898776034426972176789999998

HHsearch alignment for GI: 254780325 and conserved domain: cd04686