>cd04678 Nudix_Hydrolase_19 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=99.92 E-value=7.2e-25 Score=165.23 Aligned_cols=117 Identities=21% Similarity=0.318 Sum_probs=80.5 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 ~vgV~~iv~~~~g~vLL~rR~~~---~~~g~W~lPgG~ve~GEs~~~Aa~REv~EEtGl~v~~~~~~~--~~----~~~~ 72 (129) T cd04678 2 RVGVGVFVLNPKGKVLLGKRKGS---HGAGTWALPGGHLEFGESFEECAAREVLEETGLHIENVQFLT--VT----NDVF 72 (129) T ss_pred CCEEEEEEEECCCEEEEEEECCC---CCCCEEECCEEECCCCCCHHHHHHHHHHHHHCCEEEEEEEEE--EE----CCCC T ss_conf 53799999989995999994789---999949898104058988999999999998798525249999--98----8775 Q ss_pred CCCCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCC Q ss_conf 00001123443379999804754301057888888860037603789976300 Q gi|254780557|r 83 IQENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIV 135 (160) Q Consensus 83 ~~~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i 135 (160) T Consensus 73 ~~~~--~h~i~~~f~~~~~~g~~~~--~---~~ep~e~~~~~Wf~~deLP~l~ 118 (129) T cd04678 73 EEEG--KHYVTIFVKAEVDDGEAEP--N---KMEPEKCEGWEWFDWEELPSVD 118 (129) T ss_pred CCCC--CEEEEEEEEEEEECCCCCC--C---CCCCHHCCEEEEECHHHCCCCC T ss_conf 7789--4699999999983782364--7---7993240130899989986986

HHsearch alignment for GI: 254780557 and conserved domain: cd04678