Annotations: 6Z03

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	DUF1870	e6z03B1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: DUF1870	ECOD (v294.1)
A	Cation_ATPase	e6z03A1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Cation_ATPase	ECOD (v294.1)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.10.41	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Yeast DNA topoisomerase - domain 1	CATH (utative)
B	3.90.15.10	Alpha Beta	Alpha-Beta Complex	Topoisomerase I	Chain A, domain 3	CATH (utative)
A	1.10.10.41	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Yeast DNA topoisomerase - domain 1	CATH (utative)
A	3.90.15.10	Alpha Beta	Alpha-Beta Complex	Topoisomerase I	Chain A, domain 3	CATH (utative)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	DNA topoisomerase I	DNA binding binding nucleic acid binding nucleic acid conformation isomerase activity isomerase activity DNA topoisomerase type I (single strand cut, ATP-independent) activity catalytic activity, acting on DNA DNA topoisomerase activity catalytic activity, acting on a nucleic acid catalytic activity macromolecular conformation isomerase activity	chromosome organization primary metabolic process DNA conformation change DNA metabolic process nucleic acid metabolic process cellular component organization nucleobase-containing compound metabolic process DNA topological change organelle organization cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process	intracellular organelle cellular anatomical structure intracellular anatomical structure organelle membraneless organelle intracellular membraneless organelle chromosome

Chains	Accession	Name	Type
A, B	IPR011010	DNA breaking-rejoining enzyme, catalytic core	Homologous Superfamily
A, B	IPR001631	DNA topoisomerase I	Family
A, B	IPR008336	DNA topoisomerase I, DNA binding, eukaryotic-type	Domain
A, B	IPR014711	DNA topoisomerase I, catalytic core, alpha-helical subdomain, eukaryotic-type	Homologous Superfamily
A, B	IPR013030	DNA topoisomerase I, DNA binding, N-terminal domain 2	Homologous Superfamily
A, B	IPR013499	DNA topoisomerase I, eukaryotic-type	Domain
A, B	IPR051062	DNA topoisomerase IB	Family
A, B	IPR036202	DNA topoisomerase I, DNA binding, eukaryotic-type, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR013500	DNA topoisomerase I, catalytic core, eukaryotic-type	Domain
A, B	IPR025834	Topoisomerase I C-terminal domain	Domain
A, B	IPR013034	DNA topoisomerase I, DNA binding, N-terminal domain 1	Homologous Superfamily
A, B	IPR014727	DNA topoisomerase I, catalytic core, alpha/beta subdomain	Homologous Superfamily