>cd06139 DNA_polA_I_Ecoli_like_exo The 3'-5' exonuclease domain of DNA polymerases has a fundamental role in reducing polymerase errors and is involved in proofreading activity. E.coli-like Polymerase I (pol I), a subgroup of family-A DNA polymerases, contains a DEDDy-type DnaQ-like 3'-5' exonuclease domain in the same polypeptide chain as the polymerase domain. The exonuclease domain contains three conserved sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D 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. E. coli DNA pol I is involved in genome replication but is not the main replicating enzyme. It is also implicated in DNA repair.

Probab=98.82 E-value=4.9e-07 Score=63.95 Aligned_cols=145 Identities=19% Similarity=0.204 Sum_probs=91.5 Q ss_pred CCCEEEEECCCCCCCCCCCEEEEEEEEEECCCCEECCEEEEEEECCCCCCCCCHHHHHHHCCCHHHHHHCCCCHHHHHHH Q ss_conf 88379997527889877260489999998389728040022662178887785789898579988996079997999999 Q gi|254780661|r 2 TNHFVIYDYETFGRDVALDRPAQFAGVRVDRQWEKIESTEVFFCKPADDYLPDPEAVFITGITPQKALRDGVVEAEFSRR 81 (471) Q Consensus 2 ~~~~v~~D~ETtG~~~~~~~iiq~~~i~~d~~~~~~~~~~~~~~~~~~~~~p~p~a~~v~git~~~~~~~~~~~~e~~~~ 81 (471) T Consensus 4 ~~~~ia~DtETtgl~~~~~~ivGisl-s~~~-~----~--~~Yi-P~~h~--~-------~-------~~~l~~~~v~~~ 58 (193) T cd06139 4 KAKVFAFDTETTSLDPMQAELVGISF-AVEP-G----E--AYYI-PLGHD--Y-------G-------GEQLPREEVLAA 58 (193) T ss_pred CCCEEEEECCCCCCCCCCCEEEEEEE-EECC-C----C--EEEE-EECCC--C-------C-------CCCCCHHHHHHH T ss_conf 59878997836999868884999999-8079-9----6--8998-72365--6-------5-------446799999999 Q ss_pred HHHHHHCCCCEEEEEECHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCCCCCCCCCHH Q ss_conf 99995117965999505578999999999850785321325688710015888865556532100244444544331089 Q gi|254780661|r 82 IHQFFSVPNTCIIGYNNIRFDDYYSRNIFYRNFYDSYRWSWDNGNSRWDLLDVMRAIYAFSPDGIQWPSRDDGATSFKLQ 161 (471) Q Consensus 82 i~~~~~~~~~~~ig~N~~~FD~~~lr~~~~r~~~~~y~~~~~~~~~~~D~l~~~~~~~~~~p~~~~~~~~~~~~~~~kL~ 161 (471) T Consensus 59 lk~~led~~i~Kv~hn-~k~D~~~L~----~~gi~~-------~~~~~DTmiaa~l---l~~~----------~~~~~L~ 113 (193) T cd06139 59 LKPLLEDPSIKKVGQN-LKFDLHVLA----NHGIEL-------RGPAFDTMLASYL---LNPG----------RRRHGLD 113 (193) T ss_pred HHHHHCCCCCCEEEEC-CHHHHHHHH----HCCCCC-------CCCCHHHHHHHHH---CCCC----------CCCCCHH T ss_conf 9999739998688754-797899999----839866-------7830218999987---2799----------8888999 Q ss_pred HHHHHH-CCCC---------------------CC-CCHHHHHHHHHHHHHHHHHHHHH Q ss_conf 899871-8876---------------------43-10133318999999999986422 Q gi|254780661|r 162 DLALAN-GIEH---------------------VN-AHDAKADVYATLALVWLIREKKP 196 (471) Q Consensus 162 ~la~~n-~i~~---------------------~~-aH~A~~D~~~t~~l~k~i~~~~p 196 (471) T Consensus 114 ~La~~~l~~~~~~~~~l~gkg~~~~~~~~~~~~~~~~YAa~Da~~t~~L~~~l~~~L~ 171 (193) T cd06139 114 DLAERYLGHKTISFEDLVGKGKKQITFDQVPLEKAAEYAAEDADITLRLYELLKPKLK 171 (193) T ss_pred HHHHHHHCCCCCCHHHHHCCCCCCCCHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 9999981887663899837785537831332999999999999999999999999998

HHsearch alignment for GI: 254780661 and conserved domain: cd06139