Annotations: 2HNH

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	HHH_6	e2hnhA3	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	e2hnhA2	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	e2hnhA4	A: a+b three layers	X: Nucleotidyltransferase-like	H: Nucleotidyltransferase (From Topology)	T: Nucleotidyltransferase	F: DNA_pol3_alpha_N	ECOD (1.6)
A	PHP	e2hnhA1	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	PF14579	Helix-hairpin-helix motif (HHH_6)	Helix-hairpin-helix motif	The HHH domain is a short DNA-binding domain [1].	Domain
A	PF17657	Bacterial DNA polymerase III alpha subunit finger domain (DNA_pol3_finger)	Bacterial DNA polymerase III alpha subunit finger domain	-	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 DNA strand elongation 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 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.