2HQA

Crystal structure of the catalytic alpha subunit of E. Coli replicative DNA polymerase III

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	HHH_6	e2hqaA4	A: alpha arrays	X: HhH/H2TH	H: SAM/DNA-glycosylase	T: SAM domain-like	F: HHH_6	ECOD (1.6)
A	DNA_pol3_alpha_C	e2hqaA2	A: alpha arrays	X: DNA polymerase III finger domain (From Topology)	H: DNA polymerase III finger domain (From Topology)	T: DNA polymerase III finger domain	F: DNA_pol3_alpha_C	ECOD (1.6)
A	DNA_pol3_alpha_N	e2hqaA1	A: a+b three layers	X: Nucleotidyltransferase-like	H: Nucleotidyltransferase (From Topology)	T: Nucleotidyltransferase	F: DNA_pol3_alpha_N	ECOD (1.6)
A	PHP	e2hqaA3	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: PHP	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.140	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Metal-dependent hydrolases	CATH (4.3.0)
A	1.10.10.1600	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Bacterial DNA polymerase III alpha subunit, thumb domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02811	PHP domain (PHP)	PHP domain	-	Family
A	PF07733	Bacterial DNA polymerase III alpha NTPase domain (DNA_pol3_alpha)	Bacterial DNA polymerase III alpha NTPase domain	-	Domain
A	PF17657	Bacterial DNA polymerase III alpha subunit finger domain (DNA_pol3_finger)	Bacterial DNA polymerase III alpha subunit finger domain	-	Domain
A	PF14579	Helix-hairpin-helix motif (HHH_6)	Helix-hairpin-helix motif	The HHH domain is a short DNA-binding domain [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA polymerase III alpha 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 DNA binding binding organic cyclic compound binding nucleic acid binding	DNA-templated DNA replication lagging strand elongation primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA strand elongation organic substance metabolic process DNA replication metabolic process DNA strand elongation involved in DNA replication macromolecule metabolic process leading strand elongation	transferase complex, transferring phosphorus-containing groups DNA polymerase III complex protein-containing complex catalytic complex transferase complex DNA polymerase complex intracellular protein-containing complex intracellular anatomical structure cytoplasm cellular anatomical entity 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 intracellular anatomical structure cytoplasm cellular anatomical entity cytosol membrane-bounded organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle DNA polymerase III, core complex organelle protein-DNA complex chromosome intracellular non-membrane-bounded organelle replication fork replisome non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR040982	DNA polymerase III alpha subunit finger domain	Domain
A	IPR004013	PHP domain	Domain
A	IPR049821	DnaE1-like, PHP domain	Domain
A	IPR016195	Polymerase/histidinol phosphatase-like	Homologous Superfamily
A	IPR004365	OB-fold nucleic acid binding domain, AA-tRNA synthetase-type	Domain
A	IPR041931	Bacterial DNA polymerase III alpha subunit, thumb domain	Homologous Superfamily
A	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
A	IPR003141	Polymerase/histidinol phosphatase, N-terminal	Domain
A	IPR048472	DNA polymerase III subunit alpha, C-terminal domain	Domain
A	IPR011708	Bacterial DNA polymerase III, alpha subunit, NTPase domain	Domain
A	IPR029460	DNA polymerase, helix-hairpin-helix motif	Domain
A	IPR004805	Error-prone DNA polymerase/DNA polymerase III subunit alpha DnaE/PolC	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.