>cd03427 MTH1 MutT homolog-1 (MTH1) is a member of the Nudix hydrolase superfamily. MTH1, the mammalian counterpart of MutT, hydrolyzes oxidized purine nucleoside triphosphates, such as 8-oxo-dGTP and 2-hydroxy-ATP, to monophosphates, thereby preventing the incorporation of such oxygen radicals during replication. This is an important step in the repair mechanism in genomic and mitochondrial DNA. Like other members of the Nudix family, it requires a divalent cation, such as Mg2+ or Mn2+, for activity, and contain the Nudix motif, a highly conserved 23-residue block (GX5EX7REUXEEXGU, where U = I, L or V), that functions as a metal binding and catalytic site. MTH1 is predominantly localized in the cytoplasm and mitochondria. Structurally, this enzyme adopts a similar fold to MutT despite low sequence similarity outside the conserved nudix motif. The most distinctive structural difference between MutT and MTH1 is the presence of a beta-hairpin, which is absent in MutT. This results in a m

Probab=99.84 E-value=9.3e-21 Score=141.28 Aligned_cols=121 Identities=27% Similarity=0.351 Sum_probs=74.4 Q ss_pred EEEEECCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCEEECCCCCCCCCC Q ss_conf 99998489839999926887766687220121150788888899999999983755222220136612411632220000 Q gi|254780557|r 7 GILILNQDDLVWVGRRCFHDNNKHLSLWQMPQGGINPQEDPLDAAYRELYEETGIKSISLLGQGDSYIQYDFPAHCIQEN 86 (160) Q Consensus 7 ~vvi~n~~~~iLl~kR~~~~~~~~~g~W~~PgG~ve~gEt~~~Aa~REl~EEtGi~~~~~~~~~~~~~~~~~~~~~~~~~ 86 (160) T Consensus 4 tl~ii~~~~kiLl~~R~~~---~~~G~W~~PGGkvE~gEt~~~a~~REl~EEtGl~v~~~~~~g--~~~~~~~------- 71 (137) T cd03427 4 TLCFIKDPDKVLLLNRKKG---PGWGGWNGPGGKVEPGETPEECAIRELKEETGLTIDNLKLVG--IIKFPFP------- 71 (137) T ss_pred EEEEEEECCEEEEEEECCC---CCCCEEECCEEECCCCCCHHHHHHHHHHHHHCEEEEEEEEEE--EEEEEEC------- T ss_conf 9999998999999996999---999959795565679979999999999898692887138999--9999927------- Q ss_pred CCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCCH-HCCHHHHHHHH Q ss_conf 11234433799998047543010578888888600376037899763000-01379999999 Q gi|254780557|r 87 GYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIVV-DFKKEAYRQVV 147 (160) Q Consensus 87 ~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i~-~fk~~vy~~~l 147 (160) T Consensus 72 ---~~~~~~~~~~f~~~~~~G~~~-----~~~~e~~l~Wv~~~el~~l~~~p~d~~~l~~ll 125 (137) T cd03427 72 ---GEEERYGVFVFLATEFEGEPL-----KESEEGILDWFDIDDLPLLPMWPGDREWLPLML 125 (137) T ss_pred ---CCCEEEEEEEEEEEEEEEEEC-----CCCCCCEEEEEEHHHCCCCCCCCCHHHHHHHHH T ss_conf ---999899999999983524767-----988333689984989775899823689999997

HHsearch alignment for GI: 254780557 and conserved domain: cd03427