>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=95.46 E-value=0.11 Score=32.27 Aligned_cols=89 Identities=15% Similarity=0.135 Sum_probs=51.9 Q ss_pred EEEEECCCEEEEEECCCCHHHHCCCCCCCCCCCCCCCHHHHHHCCCCC-------CCCEECCCEEE-------EEEEEEE Q ss_conf 003413760577645720132047442111134672158886301010-------00021373589-------9831599 Q gi|254780479|r 243 FIAITNDNRILLRKRTNTRLLEGMDELPGSAWSSTKDGNIDTHSAPFT-------ANWILCNTITH-------TFTHFTL 308 (356) Q Consensus 243 ~vii~~~~kiLL~KRp~~gll~GLwEFP~~e~~~~~~~~~~~~~~~~~-------~~~~~l~~ikH-------~fTH~~L 308 (356) T Consensus 5 aIi~-~~~kiLL~~~~~~----~~~~lPGG~ve~gE~~~~al~RE~~EETG~~~i~~~~~~G~~~E~r~~~~~~~~~~~m 79 (131) T cd04686 5 AIIL-QGDKILLLYTKRY----GDYKFPGGGVEKGEDHIEGLIRELQEETGATNIRVIEKFGTYTERRPWRKPDADIFHM 79 (131) T ss_pred EEEE-ECCEEEEEEECCC----CCEECCCCCCCCCCCHHHHHHHHHHHHHCCCEEECCCCEEEEEEEEEEECCCCCEEEE T ss_conf 9999-8999999997699----9676787737899898999999999874961013131145599984100588877989 Q ss_pred EEEEEEEECCCCCC---CC--------CCEEECHHHHHH Q ss_conf 99999998077676---67--------813322788874 Q gi|254780479|r 309 TLFVWKTIVPQIVI---IP--------DSTWHDAQNLAN 336 (356) Q Consensus 309 ~i~v~~~~~~~~~~---~~--------~~~Wv~~~el~~ 336 (356) T Consensus 80 ~s~~Y~C~v~~~~g~~~le~~E~~~G~~pvWv~i~eAi~ 118 (131) T cd04686 80 ISYYYLCEVDAELGAQQLEDYEAELGMKPIWINIHEAIE 118 (131) T ss_pred EEEEEEEEECHHCCCCCCCCHHHHCCCCEEECCHHHHHH T ss_conf 878999985122189877603442697217678999999

HHsearch alignment for GI: 254780479 and conserved domain: cd04686