Annotations: 3H25

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	RepB catalytic domain-like	8046161	4004919	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Prim-pol domain-like	8092989	3001829	SCOP2 (2022-06-29)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	RepB_primase	e3h25A1	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)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.5.460	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Single helix bin	CATH (4.3.0)

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