>cd05783 DNA_polB_B1_exo The 3'-5' exonuclease domain of Sulfolobus solfataricus DNA polymerase B1 and similar archaeal proteins. B1 is a family-B DNA polymerase. Family-B DNA polymerases contain an N-terminal DEDDy DnaQ-like exonuclease domain in the same polypeptide chain as the polymerase domain, similar to family-A DNA polymerases. B1displays thermostable polymerase and 3'-5' exonuclease activities. This exonuclease domain contains three 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 are involved in metal binding and catalysis. The exonuclease domain of family-B polymerases also contains a beta hairpin structure that plays an important role in active site switching in the event of nucleotide misincorporation. Family-B DNA polymerases from thermophilic archaea are unique in that they are able to recognize the presence of uracil in the template strand, leading to the stalling of DNA synthes

Probab=92.70 E-value=0.62 Score=24.70 Aligned_cols=140 Identities=17% Similarity=0.202 Sum_probs=68.1 Q ss_pred CCCEEEECCCCCC----CC--CCCEEEEEEEEEC--CC--CEEEECCC-------------------CCCCCCHHHHHHH Q ss_conf 9827997177789----85--4450799998418--94--28997465-------------------7785706776777 Q gi|254780636|r 20 VDAIAVDTETLGL----MP--RRDRLCIVQLSPG--DG--TVDIIRIA-------------------AGQKNAPNLVGML 70 (207) Q Consensus 20 ~~~iaiDtEt~~l----~~--~~~~l~LiQl~~~--~~--~~~l~~~~-------------------~~~~~~~~L~~ll 70 (207) T Consensus 5 lrvlsfDIEv~s~~~~~FP~p~~~~~~iisI~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~v~~f~~E~~LL~~F~~~i 84 (204) T cd05783 5 LKRIAIDIEVYTPIKGRIPDPKTAEYPVISVALAGSDGLKRVLVLKREGVEGLEGLLPEGAEVEFFDSEKELIREAFKII 84 (204) T ss_pred CEEEEEEEEECCCCCCCCCCCCCCCCEEEEEEEECCCCCEEEEEEEECCCCCCCCCCCCCCEEEEECCHHHHHHHHHHHH T ss_conf 74999998878899997979555886199999992799889999950871257655789989999599999999999997 Q ss_pred HCCCCCEEECCC-CHHHHHHHHHHHCC---CC--C-------------H-HHHH-------HHHHHHHHHCCCHHHHHHH Q ss_conf 323640230100-00168886542000---00--0-------------0-4578-------9886521100000088777 Q gi|254780636|r 71 VDEKREKIFHYG-RFDIAVLFYTFGVR---VR--P-------------V-FCTK-------IASRLTRTYTNQHGLKDNL 123 (207) Q Consensus 71 ~d~~i~KV~Hn~-~~D~~~L~~~~gi~---~~--~-------------i-~DT~-------ias~l~~~~~~~~~L~~L~ 123 (207) T Consensus 85 ~~~p~I-i~wN~~~FDiPYL~~R~~~Lg~~~~~~~~~~~~~~~~~~~~~~~dl~~~~~~~~~~~y~~~~k~~sY~Ld~Va 163 (204) T cd05783 85 SEYPIV-LTFNGDNFDLPYLYNRALKLGIPKEEIPIYLKRDYATLKHGIHIDLYKFFSNRAIQVYAFGNKYREYTLDAVA 163 (204) T ss_pred HCCCEE-EECCCCCCCHHHHHHHHHHHCCCCEEEEEEECCEEEEEEEEEEEEEHHHCCCCHHHHHHCCCCCCCCCHHHHH T ss_conf 439979-9817867788999999998599820456673436999934499986463573135441202421225288999 Q ss_pred HHHHCCC-CCCCCEECCCCCCCCCHHHHHHHHHHHHHHHHHH Q ss_conf 6542002-4675200365654432368999986459999999 Q gi|254780636|r 124 KELLGIN-ISKAQQSSDWSADDLSDEQLQYAASDVVHLHALR 164 (207) Q Consensus 124 ~~~lg~~-ldK~~q~SdW~~rpLs~~Qi~YAA~Dv~~l~~L~ 164 (207) T Consensus 164 ~~~LGe~K~d~~~~~--~~~-d~-~k~i~YNi~D~~Lv~~L~ 201 (204) T cd05783 164 KALLGEGKVELEKNI--SEL-NL-YELAEYNYRDAELTLELT 201 (204) T ss_pred HHHHCCCCCCCCCCC--CCC-CH-HHHHEEEHHHHHHHHHHH T ss_conf 998388860067644--425-86-785514267767777862

HHsearch alignment for GI: 254780636 and conserved domain: cd05783