1DPI

STRUCTURE OF LARGE FRAGMENT OF ESCHERICHIA COLI DNA POLYMERASE I COMPLEXED WITH D/TMP


Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
APF016123'-5' exonuclease (DNA_pol_A_exo1)3'-5' exonucleaseThis domain is responsible for the 3'-5' exonuclease proofreading activity of E. coli DNA polymerase I (polI) and other enzymes, it catalyses the hydrolysis of unpaired or mismatched nucleotides. This domain consists of the amino-terminal half of the ...This domain is responsible for the 3'-5' exonuclease proofreading activity of E. coli DNA polymerase I (polI) and other enzymes, it catalyses the hydrolysis of unpaired or mismatched nucleotides. This domain consists of the amino-terminal half of the Klenow fragment in E. coli polI it is also found in the Werner syndrome helicase (WRN), focus forming activity 1 protein (FFA-1) and ribonuclease D (RNase D). Werner syndrome is a human genetic disorder causing premature aging; the WRN protein has helicase activity in the 3'-5' direction [4,5]. The FFA-1 protein is required for formation of a replication foci and also has helicase activity; it is a homologue of the WRN protein [3]. RNase D is a 3'-5' exonuclease involved in tRNA processing. Also found in this family is the autoantigen PM/Scl thought to be involved in polymyositis-scleroderma overlap syndrome.
Domain
APF027395'-3' exonuclease, N-terminal resolvase-like domain (5_3_exonuc_N)5'-3' exonuclease, N-terminal resolvase-like domain- Domain
APF013675'-3' exonuclease, C-terminal SAM fold (5_3_exonuc)5'-3' exonuclease, C-terminal SAM fold- Domain
APF00476DNA polymerase family A (DNA_pol_A)DNA polymerase family A- Family