>cd06131 DNA_pol_III_epsilon_Ecoli_like This subfamily is composed of the epsilon subunit of Escherichia coli DNA polymerase III (polIII) and similar proteins. PolIII is the main DNA replicating enzyme in bacteria, functioning as the chromosomal replicase. It is a holoenzyme 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=99.96 E-value=3.8e-28 Score=199.64 Aligned_cols=161 Identities=19% Similarity=0.127 Sum_probs=129.5 Q ss_pred EEEECCCCCCCCCC-CEEEEEEEEEECCCCEECC-EEEEEEECCCCCCCCCHHHHHHHCCCHHHHHHCCCCHHHHHHHHH Q ss_conf 99975278898772-6048999999838972804-002266217888778578989857998899607999799999999 Q gi|254780661|r 6 VIYDYETFGRDVAL-DRPAQFAGVRVDRQWEKIE-STEVFFCKPADDYLPDPEAVFITGITPQKALRDGVVEAEFSRRIH 83 (471) Q Consensus 6 v~~D~ETtG~~~~~-~~iiq~~~i~~d~~~~~~~-~~~~~~~~~~~~~~p~p~a~~v~git~~~~~~~~~~~~e~~~~i~ 83 (471) T Consensus 2 Vv~D~ETTGl~p~~~d~Iieigav~~~~-~~~~~~~~~~-lv~P--~~~i~~~~~~ihGIt~e~l~~~p-~~~ev~~~f~ 76 (167) T cd06131 2 IVLDTETTGLDPREGHRIIEIGCVELIN-RRLTGNTFHV-YINP--ERDIPEEAFKVHGITDEFLADKP-KFAEIADEFL 76 (167) T ss_pred EEEECCCCCCCCCCCCEEEEEEEEEEEC-CEEECCEEEE-EECC--CCCCCHHHHHHHCCCHHHHCCCC-CHHHHHHHHH T ss_conf 8997606988988998379999999999-9992447899-9897--89899889978096858983597-5899999998 Q ss_pred HHHHCCCCEEEEEECHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCCCCCCCCCHHHH Q ss_conf 99511796599950557899999999985078532132568871001588886555653210024444454433108989 Q gi|254780661|r 84 QFFSVPNTCIIGYNNIRFDDYYSRNIFYRNFYDSYRWSWDNGNSRWDLLDVMRAIYAFSPDGIQWPSRDDGATSFKLQDL 163 (471) Q Consensus 84 ~~~~~~~~~~ig~N~~~FD~~~lr~~~~r~~~~~y~~~~~~~~~~~D~l~~~~~~~~~~p~~~~~~~~~~~~~~~kL~~l 163 (471) T Consensus 77 ~~l~--~~~lVaHN-~~FD~~fL~~~~~r~~~~~~~---~~~~~~~Dtl~l~r~~---~p-----------~~~~~L~~l 136 (167) T cd06131 77 DFIR--GAELVIHN-ASFDVGFLNAELSLLGLGKKI---IDFCRVIDTLALARKK---FP-----------GKPNSLDAL 136 (167) T ss_pred HHCC--CCEEEEEC-HHHHHHHHHHHHHHHCCCCCC---CCCCCCCCHHHHHHHH---CC-----------CCCCCHHHH T ss_conf 6356--99999837-187899999999981899777---7655411399999998---49-----------998889999 Q ss_pred HHHHCCCCCC--CCHHHHHHHHHHHHHHHH Q ss_conf 9871887643--101333189999999999 Q gi|254780661|r 164 ALANGIEHVN--AHDAKADVYATLALVWLI 191 (471) Q Consensus 164 a~~n~i~~~~--aH~A~~D~~~t~~l~k~i 191 (471) T Consensus 137 ~~~~gi~~~~~~~H~Al~Da~~ta~vf~~l 166 (167) T cd06131 137 CKRFGIDNSHRTLHGALLDAELLAEVYLEL 166 (167) T ss_pred HHHCCCCCCCCCCCCHHHHHHHHHHHHHHH T ss_conf 987697999998758899999999999976

HHsearch alignment for GI: 254780661 and conserved domain: cd06131