1J53
Structure of the N-terminal Exonuclease Domain of the Epsilon Subunit of E.coli DNA Polymerase III at pH 8.5
External Resource: Annotation
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | d1j53a_ | Alpha and beta proteins (a/b) | Ribonuclease H-like motif | Ribonuclease H-like | DnaQ-like 3'-5' exonuclease | N-terminal exonuclease domain of the epsilon subunit of DNA polymerase III | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Domain Annotation: ECOD Classification ECOD Database Homepage
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.30.420.10 | Alpha Beta | 2-Layer Sandwich | Nucleotidyltransferase | domain 5 | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF00929 | Exonuclease (RNase_T) | Exonuclease | - | Family |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR036397 | Ribonuclease H superfamily | Homologous Superfamily | |
IPR006054 | DNA polymerase III epsilon subunit, exonuclease domain | Domain | |
IPR006309 | DNA polymerase 3, epsilon subunit | Family | |
IPR012337 | Ribonuclease H-like superfamily | Homologous Superfamily | |
IPR013520 | Exonuclease, RNase T/DNA polymerase III | Domain |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
3'-5' exonuclease M-CSA #754 | Escherichia coli replicative DNA polymerase III, a member of family C of DNA polymerases, serves as the main DNA polymerase for E. coli. The polymerase activity is catalysed by the alpha subunit, with the epsilon subunit catalysing the 3'-5' exonuclease proofreading activity. The N-terminal domain of the epsilon subunit is the archetypal member of the DnaQ superfamily of 3'-5' exonucleases. | Defined by 5 residues: ASP:A-12GLU:A-14GLU:A-61HIS:A-162ASP:A-167 | EC: 2.7.7.7 (PDB Primary Data) |