Annotations: 2GUI

Structure and Function of Cyclized Versions of the Proofreading Exonuclease Subunit of E. coli DNA Polymerase III

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2guia_	Alpha and beta proteins (a/b)	Ribonuclease H-like motif	Ribonuclease H-like	DnaQ-like 3'-5' exonuclease	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	DnaQ-like 3'-5' exonuclease	8029695	4000547	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Ribonuclease H-like	8042074	3000143	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	RNase_T	e2guiA1	A: a/b three-layered sandwiches	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: RNase_T	ECOD (v294.1)

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
A	PF00929	Exonuclease (RNase_T)	Exonuclease	This family includes a variety of exonuclease proteins, such as ribonuclease T and the epsilon subunit of DNA polymerase III.;	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA polymerase III epsilon subunit	catalytic activity, acting on DNA DNA-directed DNA polymerase activity DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups hydrolase activity, acting on ester bonds nuclease activity hydrolase activity exonuclease activity DNA binding binding catalytic activity, acting on DNA DNA-directed DNA polymerase activity DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups hydrolase activity, acting on ester bonds nuclease activity hydrolase activity exonuclease activity DNA binding binding nucleic acid binding 3'-5' exonuclease activity cation binding ion binding metal ion binding small molecule binding	DNA-templated DNA replication lagging strand elongation primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process leading strand elongation cellular response to stimulus DNA-templated DNA replication lagging strand elongation primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process leading strand elongation cellular response to stimulus response to stimulus DNA-templated DNA replication maintenance of fidelity DNA replication proofreading cellular response to stress DNA damage response response to stress DNA repair	transferase complex, transferring phosphorus-containing groups DNA polymerase III complex protein-containing complex catalytic complex transferase complex DNA polymerase complex intracellular protein-containing complex cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus nuclear protein-containing complex transferase complex, transferring phosphorus-containing groups DNA polymerase III complex protein-containing complex catalytic complex transferase complex DNA polymerase complex intracellular protein-containing complex cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle DNA polymerase III, core complex organelle protein-DNA complex intracellular membraneless organelle chromosome membraneless organelle replication fork replisome

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036397	Ribonuclease H superfamily	Homologous Superfamily
A	IPR006054	DNA polymerase III epsilon subunit, exonuclease domain	Domain
A	IPR013520	Ribonuclease H-like domain	Domain
A	IPR006309	DNA polymerase 3, epsilon subunit	Family
A	IPR012337	Ribonuclease H-like superfamily	Homologous Superfamily

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.