>cd04683 Nudix_Hydrolase_24 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=1e-24 Score=164.32 Aligned_cols=119 Identities=23% Similarity=0.269 Sum_probs=77.2 Q ss_pred EEEEEEECCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCEEECCCCCCCC Q ss_conf 06999984898399999268877666872201211507888888999999999837552222201366124116322200 Q gi|254780557|r 5 GVGILILNQDDLVWVGRRCFHDNNKHLSLWQMPQGGINPQEDPLDAAYRELYEETGIKSISLLGQGDSYIQYDFPAHCIQ 84 (160) Q Consensus 5 ~V~vvi~n~~~~iLl~kR~~~~~~~~~g~W~~PgG~ve~gEt~~~Aa~REl~EEtGi~~~~~~~~~~~~~~~~~~~~~~~ 84 (160) T Consensus 2 av~-vvl~~~~~vLL~~R~~~--~~~~G~W~~PGG~ve~GEt~~~aa~REl~EEtGl~v~~~~l~~~~~~~~~------- 71 (120) T cd04683 2 AVY-VLLRRDDEVLLQRRANT--GYMDGQWALPAGHLEKGEDAVTAAVREAREEIGVTLDPEDLRLAHTMHRR------- 71 (120) T ss_pred EEE-EEEEECCEEEEEECCCC--CCCCCEEECCEEECCCCCCHHHHHHHHHHHHHCCEEEECEEEEEEEEECC------- T ss_conf 899-99993999999977899--99999798975887799999999999988876938873408999988326------- Q ss_pred CCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCCHHCCH Q ss_conf 00112344337999980475430105788888886003760378997630000137 Q gi|254780557|r 85 ENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIVVDFKK 140 (160) Q Consensus 85 ~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i~~fk~ 140 (160) T Consensus 72 ~~~~~~~~~~~f~~~~~~g--~p~-----~~~p~e~~~~~Wf~~deLP~~~~~~~~ 120 (120) T cd04683 72 TEDIESRIGLFFTVRRWSG--EPR-----NCEPDKCAELRWFPLDALPDDTVDYVR 120 (120) T ss_pred CCCCCEEEEEEEEEEEECC--EEE-----CCCCCCEEEEEEECHHHCCCCCCCCCC T ss_conf 8998799999999997478--986-----189981458999998899886577749

HHsearch alignment for GI: 254780557 and conserved domain: cd04683