>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=99.71 E-value=6.1e-17 Score=119.07 Aligned_cols=114 Identities=17% Similarity=0.245 Sum_probs=69.3 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 avraIi~~-~~kiLL~~~~~------~~~~~lPGG~ve~gE~~~~al~RE~~EETG~~~i~~~~~~-G~~~E-~r~~~~~ 72 (131) T cd04686 2 AVRAIILQ-GDKILLLYTKR------YGDYKFPGGGVEKGEDHIEGLIRELQEETGATNIRVIEKF-GTYTE-RRPWRKP 72 (131) T ss_pred CEEEEEEE-CCEEEEEEECC------CCCEECCCCCCCCCCCHHHHHHHHHHHHHCCCEEECCCCE-EEEEE-EEEEECC T ss_conf 48999998-99999999769------9967678773789989899999999987496101313114-55999-8410058 Q ss_pred CCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCC---EEEECCHHHHHH Q ss_conf 0011234433799998047543010578888888600---376037899763 Q gi|254780557|r 85 ENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFD---AWTWVSLWDTPN 133 (160) Q Consensus 85 ~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~---~~~Wv~~~el~~ 133 (160) T Consensus 73 ~~~~~~m~s~~Y~C~v~~~~g~~~l------e~~E~~~G~~pvWv~i~eAi~ 118 (131) T cd04686 73 DADIFHMISYYYLCEVDAELGAQQL------EDYEAELGMKPIWINIHEAIE 118 (131) T ss_pred CCCEEEEEEEEEEEEECHHCCCCCC------CCHHHHCCCCEEECCHHHHHH T ss_conf 8877989878999985122189877------603442697217678999999

HHsearch alignment for GI: 254780557 and conserved domain: cd04686