>cd05776 DNA_polB_alpha_exo The 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha. DNA polymerase alpha is a family-B DNA polymerase with a catalytic subunit that contains a DnaQ-like 3'-5' exonuclease domain. It is one of the three DNA-dependent type B DNA polymerases (delta and epsilon are the other two) that have been identified as essential for nuclear DNA replication in eukaryotes. DNA polymerase alpha is almost exclusively required for the initiation of DNA replication and the priming of Okazaki fragments during elongation. It associates with DNA primase and is the only enzyme able to start DNA synthesis de novo. The catalytic subunit contains both polymerase and 3'-5' exonuclease domains, but only exhibits polymerase activity. The 3'-5' exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, without the four conserved acidic residues that are crucial for metal binding and catalysis. This explains why in most organisms, that no specific repair r

Probab=96.22 E-value=0.0089 Score=38.84 Aligned_cols=109 Identities=24% Similarity=0.317 Sum_probs=62.1 Q ss_pred HHHHHHHHHHH--CCCCCHHHHCCC-CHHHHHHHH----CCCC---------------------------CCC--CCCHH Q ss_conf 99997444420--222100110032-123788986----1886---------------------------664--21002 Q gi|254780277|r 447 KEILSYLKKFF--ENEHFLKIGHNI-KYDKLVLHR----YGIS---------------------------MRG--FEDIM 490 (976) Q Consensus 447 ~evl~~L~~ll--e~~~i~kIgHN~-KfD~~~L~~----~GI~---------------------------l~~--i~DTm 490 (976) T Consensus 83 r~LL~~f~~~i~~~DPDii-~Ghni~~fdl~~L~~R~~~lki~~wsriGRlkr~~~p~~~~~~~~~~~~~~~GRl~~D~~ 161 (234) T cd05776 83 RALLNFFLAKLQKIDPDVL-VGHDLEGFDLDVLLSRIQELKVPHWSRIGRLKRSVWPKKKGGGKFGERELTAGRLLCDTY 161 (234) T ss_pred HHHHHHHHHHHHHCCCCEE-EEECCCCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEECCEEEEECH T ss_conf 9999999999985099899-850637775999999999809985331355001437644565653442035235887609 Q ss_pred HHHHHHCCCCCCCCHHHHHHHHCCCCCCCCCCCCCCCCCCHHHCCHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 3455431687667724667762244422335654322210000001233332221111124567763 Q gi|254780277|r 491 LMSYVLDSGRSSHDIASIAQKWLSYTRKEILKSRKSSIPIDKISDSQVQEHAIENSNVILQLWLLLR 557 (976) Q Consensus 491 laayLLdp~~~~~~L~~la~~yL~~~~~e~~~~~k~~~~~~~i~~e~~~~Yaa~Da~~t~~L~~~l~ 557 (976) T Consensus 162 ~~~ke~~-k~~sy~L~~v~~~~L~~~k~dv~~~~i~~~~~~~~~l~~l~~~~~~Da~l~~~L~~~L~ 227 (234) T cd05776 162 LSAKELI-RCKSYDLTELSQQVLGIERQDIDPEEILNMYNDSESLLKLLEHTEKDAYLILQLMFKLN 227 (234) T ss_pred HHHHHHH-CCCCCCHHHHHHHHHCCCCCCCCHHHHHHHHHCHHHHHHHHHHHHHHHHHHHHHHHHHC T ss_conf 9999874-66778889999999686766799999999986939999999999999999999999958

HHsearch alignment for GI: 254780277 and conserved domain: cd05776