>cd06130 DNA_pol_III_epsilon_like This subfamily is composed of uncharacterized bacterial proteins with similarity to the epsilon subunit of DNA polymerase III (polIII), a multisubunit polymerase which is the main DNA replicating enzyme in bacteria, functioning as the chromosomal replicase. The pol III holoenzyme is a complex of ten different subunits, three of which (alpha, epsilon, and theta) compose the catalytic core. The polIII epsilon subunit, encoded by the dnaQ gene, is a DEDDh-type 3'-5' exonuclease which is responsible for the proofreading activity of the polymerase, increasing the fidelity of DNA synthesis. It contains three conserved sequence motifs termed ExoI, ExoII and ExoIII, with a specific Hx(4)D conserved pattern at ExoIII. These motifs are clustered around the active site and contain four conserved acidic residues that serve as ligands for the two metal ions required for catalysis. The epsilon subunit of polIII also functions as a stabilizer of the holoenzyme complex

Probab=98.60 E-value=8.6e-08 Score=75.43 Aligned_cols=138 Identities=13% Similarity=0.211 Sum_probs=88.7 Q ss_pred CCCCCCCCCCCCCCCCCCCCCEEECCCCCCCCCCCCCCEEC-C---CC------CCCCCCCCCCCCCHHHHHHHHHHHHC Q ss_conf 52323322243311001244201025776654434550231-3---74------43334565001788999974444202 Q gi|254780277|r 389 SASFKIITDTMDAFHSKPIAIAISTLDQKDDTSFKVETIFI-D---LS------VHTSQDSTGKNTLTKEILSYLKKFFE 458 (976) Q Consensus 389 ~ia~DtETt~ld~~~~~ivGisls~~~~~~~~~~~~~~~yi-p---~~------~~~~~d~~~~~~~~~evl~~L~~lle 458 (976) T Consensus 1 fvv~D~ETT~~--~~d~IieIgav~i~~g~i~~--~f~~lv~P~~~i~~~~~~ihGIt~~~v~~~p~~~~v~~~l~~~l~ 76 (156) T cd06130 1 FVAIDFETANA--DRASACSIGLVKVRDGQIVD--TFYTLIRPPTRFDPFNIAIHGITPEDVADAPTFPEVWPEIKPFLG 76 (156) T ss_pred CEEEEEECCCC--CCCEEEEEEEEEEECCEEEE--EEEEEECCCCCCCHHHHHHHCCCHHHHHCCCCHHHHHHHHHHHCC T ss_conf 98999778989--99969999999999999989--999987789879988932208887998409999999999998558 Q ss_pred CCCCHHHHCCCCHHHHHHHH----CCCCCCC--CCCHHHHHHHHCCCCCCCCHHHHHHHHCCCCCCCCCCCCCCCCCCHH Q ss_conf 22100110032123788986----1886664--21002345543168766772466776224442233565432221000 Q gi|254780277|r 459 NEHFLKIGHNIKYDKLVLHR----YGISMRG--FEDIMLMSYVLDSGRSSHDIASIAQKWLSYTRKEILKSRKSSIPIDK 532 (976) Q Consensus 459 ~~~i~kIgHN~KfD~~~L~~----~GI~l~~--i~DTmlaayLLdp~~~~~~L~~la~~yL~~~~~e~~~~~k~~~~~~~ 532 (976) T Consensus 77 ~~--~lVaHn~~FD~~fL~~~~~~~~~~~~~~~~iDtl~l~r~~~~~~~~~~L~~l~~~~-gi~~--------------- 138 (156) T cd06130 77 GS--LVVAHNASFDRSVLRAALEAYGLPPPPYQYLCTVRLARRVWPLLPNHKLNTVAEHL-GIEL--------------- 138 (156) T ss_pred CC--EEEEECHHHHHHHHHHHHHHCCCCCCCCCEECHHHHHHHHCCCCCCCCHHHHHHHC-CCCC--------------- T ss_conf 98--89995778899999999998199998985881899999973888889999999985-9998--------------- Q ss_pred HCCHHHHHHHHHHHHHHHHHH Q ss_conf 000123333222111112456 Q gi|254780277|r 533 ISDSQVQEHAIENSNVILQLW 553 (976) Q Consensus 533 i~~e~~~~Yaa~Da~~t~~L~ 553 (976) T Consensus 139 ---~--~H~Al~DA~ata~l~ 154 (156) T cd06130 139 ---N--HHDALEDARACAEIL 154 (156) T ss_pred ---C--CCCCHHHHHHHHHHH T ss_conf ---7--879689999999998

HHsearch alignment for GI: 254780277 and conserved domain: cd06130