Annotations: 6Z01

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF02919	e6z01A3	A: beta complex topology	X: Beta-strand domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	H: Beta-strand domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	T: Beta-strand domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment	F: PF02919	ECOD (1.6)
A	PF01028	e6z01A2	A: alpha arrays	X: HTH	H: HTH	T: DNA breaking-rejoining enzymes	F: PF01028	ECOD (1.6)
A	PF14370	e6z01A5	A: alpha arrays	X: HTH	H: HTH	T: DNA breaking-rejoining enzymes	F: PF14370	ECOD (1.6)
A	PF02919	e6z01A4	A: alpha arrays	X: Alpha-helical domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	H: Alpha-helical domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	T: Alpha-helical domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment	F: PF02919	ECOD (1.6)
A	F_UNCLASSIFIED	e6z01A1	A: alpha bundles	X: Long alpha-hairpin	H: Eukaryotic DNA topoisomerase I, dispensable insert domain (From Topology)	T: Eukaryotic DNA topoisomerase I, dispensable insert domain	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF02919	e6z01B1	A: beta complex topology	X: Beta-strand domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	H: Beta-strand domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	T: Beta-strand domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment	F: PF02919	ECOD (1.6)
B	PF01028	e6z01B5	A: alpha arrays	X: HTH	H: HTH	T: DNA breaking-rejoining enzymes	F: PF01028	ECOD (1.6)
B	PF14370	e6z01B4	A: alpha arrays	X: HTH	H: HTH	T: DNA breaking-rejoining enzymes	F: PF14370	ECOD (1.6)
B	PF02919	e6z01B2	A: alpha arrays	X: Alpha-helical domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	H: Alpha-helical domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment (From Topology)	T: Alpha-helical domain in eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment	F: PF02919	ECOD (1.6)
B	F_UNCLASSIFIED	e6z01B3	A: alpha bundles	X: Long alpha-hairpin	H: Eukaryotic DNA topoisomerase I, dispensable insert domain (From Topology)	T: Eukaryotic DNA topoisomerase I, dispensable insert domain	F: F_UNCLASSIFIED	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF14370	C-terminal topoisomerase domain (Topo_C_assoc)	C-terminal topoisomerase domain	-	Family
A, B	PF01028	Eukaryotic DNA topoisomerase I, catalytic core (Topoisom_I)	Eukaryotic DNA topoisomerase I, catalytic core	Topoisomerase I promotes the relaxation of DNA superhelical tension by introducing a transient single-stranded break in duplex DNA and are vital for the processes of replication, transcription, and recombination [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	DNA topoisomerase I	DNA binding binding organic cyclic compound binding nucleic acid binding 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	nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA replication organic substance metabolic process metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular process cell cycle chromosome segregation cell cycle process chromosome organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA replication organic substance metabolic process metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular process cell cycle chromosome segregation cell cycle process chromosome organization DNA conformation change cellular component organization DNA topological change organelle organization cellular component organization or biogenesis	intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle chromosome cellular anatomical entity non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

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	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

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 R01GM133198.