Annotations: 3H20

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Prim-pol domain-like	8092989	3001829	SCOP2B (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	Ribosomal_S13_N_like	e3h20A2	A: alpha bundles	X: Primase helical domain (From Topology)	H: Primase helical domain (From Topology)	T: Primase helical domain	F: Ribosomal_S13_N_like	ECOD (1.6)
A	RepB_primase	e3h20A1	A: a+b complex topology	X: Prim-pol domain (From Topology)	H: Prim-pol domain (From Topology)	T: Prim-pol domain	F: RepB_primase	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.1490.240	Alpha Beta	2-Layer Sandwich	Dna Ligase	domain 1	CATH (4.3.0)
A	3.30.70.1790	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	RepB DNA-primase, N-terminal domain	CATH (4.3.0)
A	1.10.1240.50	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF16793	RepB DNA-primase N-terminal domain (RepB_primase)	RepB DNA-primase N-terminal domain	RepB_primase is a DNA-primase produced by P4-like phages. It is a zinc-independent primase unlike Pri-type primases. It takes up a dumbbell shaped consisting of an N-terminal catalytic domain separated by a long alpha-helix plus tether and a C-termin ...	RepB_primase is a DNA-primase produced by P4-like phages. It is a zinc-independent primase unlike Pri-type primases. It takes up a dumbbell shaped consisting of an N-terminal catalytic domain separated by a long alpha-helix plus tether and a C-terminal helical-bundle domain. Primases are necessary for phage replication. RepBprime primases such as in this family recognise both ssiA and ssiB, ie only 1 single-stranded primase initiation site on each strand, independently of each other and then synthesise primers that are elongated by DNA polymerase III. The phage is thus replicated exclusively in leading strand mode [1].	Domain
A	PF22448	RepB DNA-primase C-terminal helical domain (RepB_primase_C)	RepB DNA-primase C-terminal helical domain	RepB_primase is a DNA-primase produced by P4-like phages. It is a zinc-independent primase unlike Pri-type primases. It takes up a dumbbell shaped consisting of an N-terminal catalytic domain separated by a long alpha-helix plus tether and a C-termin ...	RepB_primase is a DNA-primase produced by P4-like phages. It is a zinc-independent primase unlike Pri-type primases. It takes up a dumbbell shaped consisting of an N-terminal catalytic domain separated by a long alpha-helix plus tether and a C-terminal helical-bundle domain. Primases are necessary for phage replication. RepBprime primases such as in this family recognise both ssiA and ssiB, ie only 1 single-stranded primase initiation site on each strand, independently of each other and then synthesise primers that are elongated by DNA polymerase III. The phage is thus replicated exclusively in leading strand mode [1].	Domain

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR054366	RepB/MobA-like, C-terminal domain	Domain
A	IPR039459	RepB-like DNA primase domain	Domain

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.