>cd04695 Nudix_Hydrolase_36 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=99.93 E-value=3e-25 Score=167.43 Aligned_cols=126 Identities=22% Similarity=0.279 Sum_probs=85.0 Q ss_pred EEEEE---ECCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCEEECCCCCC Q ss_conf 69999---848983999992688776668722012115078888889999999998375522222013661241163222 Q gi|254780557|r 6 VGILI---LNQDDLVWVGRRCFHDNNKHLSLWQMPQGGINPQEDPLDAAYRELYEETGIKSISLLGQGDSYIQYDFPAHC 82 (160) Q Consensus 6 V~vvi---~n~~~~iLl~kR~~~~~~~~~g~W~~PgG~ve~gEt~~~Aa~REl~EEtGi~~~~~~~~~~~~~~~~~~~~~ 82 (160) T Consensus 2 ~~~v~~~~~~~~~~~LlLkR~~----~~~g~W~~p~G~iE~gEs~~eaA~REl~EETGl~~~~l~~~~~~~~~y~~---- 73 (131) T cd04695 2 VSGVLLRSLDKETKVLLLKRVK----TLGGFWCHVAGGVEAGETAWQAALRELKEETGISLPELYNADYLEQFYEA---- 73 (131) T ss_pred EEEEEEEEECCCCEEEEEECCC----CCCCEECCCCCCCCCCCCHHHHHHHHHHHHHCCCCEEEEECCEEEEEEEC---- T ss_conf 5799999989988899997689----99995869823346999999999998889778774347712426889984---- Q ss_pred CCCCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCCH-HCCHHHHHHHHHHH Q ss_conf 000011234433799998047543010578888888600376037899763000-01379999999999 Q gi|254780557|r 83 IQENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIVV-DFKKEAYRQVVADF 150 (160) Q Consensus 83 ~~~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i~-~fk~~vy~~~l~~l 150 (160) T Consensus 74 --~~~-~i~-~~~~f~~~~~~~~~v~l-------s~Eh~~y~W~~~eea~~ll~~~~~r~~l~~~~~~~ 131 (131) T cd04695 74 --NDN-RIL-MAPVFVGFVPPHQEVVL-------NHEHTEYRWCSFAEALELAPFPGQRALYDHVWRYF 131 (131) T ss_pred --CCC-EEE-EEEEEEEEECCCCCCCC-------CCCCCCCEECCHHHHHHHCCCCCHHHHHHHHHHHC T ss_conf --897-699-99999999389997825-------62032089718999996769967899999999759

HHsearch alignment for GI: 254780557 and conserved domain: cd04695