>cd04672 Nudix_Hydrolase_14 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=99.88 E-value=1.5e-22 Score=151.65 Aligned_cols=114 Identities=18% Similarity=0.169 Sum_probs=75.9 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 ~v~V~~vv~~-dg~vLL~rr~~------~g~W~lPGG~ve~gEt~~eaa~REv~EETGl~v~~~~l~~v--~~~---~~~ 69 (123) T cd04672 2 KVDVRAAIFK-DGKILLVREKS------DGLWSLPGGWADVGLSPAENVVKEVKEETGLDVKVRKLAAV--DDR---NKH 69 (123) T ss_pred CCEEEEEEEE-CCEEEEEEECC------CCEEECCCEECCCCCCHHHHHHHHHHHHHCCEEEEEEEEEE--ECC---CCC T ss_conf 3209999998-99999999889------99398984663799899999999999977909998589999--835---432 Q ss_pred CCCCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCCHH Q ss_conf 0000112344337999980475430105788888886003760378997630000 Q gi|254780557|r 83 IQENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIVVD 137 (160) Q Consensus 83 ~~~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i~~ 137 (160) T Consensus 70 ~~~~~~~~~~~~~f~~~~~~g~---------~~~~~E~~e~~Wf~~deLP~L~~~ 115 (123) T cd04672 70 HPPPQPYQVYKLFFLCEILGGE---------FKPNIETSEVGFFALDDLPPLSEK 115 (123) T ss_pred CCCCCCEEEEEEEEEEEECCCC---------CCCCCHHHEEEEECHHHCCCCCCC T ss_conf 7999524999999999987893---------888945643679888899878756

HHsearch alignment for GI: 254780557 and conserved domain: cd04672