>cd04670 Nudix_Hydrolase_12 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=99.94 E-value=8.2e-27 Score=176.54 Aligned_cols=124 Identities=31% Similarity=0.456 Sum_probs=94.3 Q ss_pred CCEEEEEEECCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCEEECCCCCC Q ss_conf 66069999848983999992688776668722012115078888889999999998375522222013661241163222 Q gi|254780557|r 3 RRGVGILILNQDDLVWVGRRCFHDNNKHLSLWQMPQGGINPQEDPLDAAYRELYEETGIKSISLLGQGDSYIQYDFPAHC 82 (160) Q Consensus 3 R~~V~vvi~n~~~~iLl~kR~~~~~~~~~g~W~~PgG~ve~gEt~~~Aa~REl~EEtGi~~~~~~~~~~~~~~~~~~~~~ 82 (160) T Consensus 2 ~igv~avi~n~~~~vLlv~~~~~~----~g~W~lPgG~ve~GEt~~eaa~REv~EEtGl~v~~~~~l~---~~------- 67 (127) T cd04670 2 TVGVGGLVLNEKNEVLVVQERNKT----PNGWKLPGGLVDPGEDIFDGAVREVLEETGIDTEFVSVVG---FR------- 67 (127) T ss_pred EEEEEEEEEECCCEEEEEEECCCC----CCCEECCCCCCCCCCCHHHHHHHHHHHHHCCEEEEEEEEE---EE------- T ss_conf 678999999799999999977899----9958998203159979999999999998794568975898---99------- Q ss_pred CCCCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCCHHCCHHHHHHHHH Q ss_conf 000011234433799998047543010578888888600376037899763000013799999999 Q gi|254780557|r 83 IQENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIVVDFKKEAYRQVVA 148 (160) Q Consensus 83 ~~~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i~~fk~~vy~~~l~ 148 (160) T Consensus 68 ~~~~~~~~~~~~~f~~~~~~~~~~i~~~------~~Ei~e~~W~~~~El~~~--p~~~~~~r~~~~ 125 (127) T cd04670 68 HAHPGAFGKSDLYFICRLKPLSFDINFD------TSEIAAAKWMPLEEYISQ--PITSEVNRLILD 125 (127) T ss_pred ECCCCCCCCEEEEEEEEEECCCCCCCCC------CCCEEEEEEECHHHHHCC--CCCHHHHHHHHC T ss_conf 6079888971799999998188877889------850578788369998708--870466665612

HHsearch alignment for GI: 254780557 and conserved domain: cd04670