Annotations: 5D5H

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Topoisom_bac	e5d5hA3	A: alpha bundles	X: EF-hand	H: HTH	T: winged helix domain	F: Topoisom_bac	ECOD (develop294)
A	EF-hand_7	e5d5hA5	A: alpha bundles	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7	ECOD (develop294)
A	Rh5	e5d5hA4	A: alpha bundles	X: Restriction endonuclease-like	H: Restriction endonuclease-like	T: Restriction endonuclease-like	F: Rh5	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.140	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
A	1.10.460.10	Mainly Alpha	Orthogonal Bundle	Topoisomerase I	domain 2	CATH (4.3.0)
A	2.70.20.10	Mainly Beta	Distorted Sandwich	Topoisomerase I	domain 3	CATH (4.3.0)
A	1.10.290.10	Mainly Alpha	Orthogonal Bundle	Topoisomerase I	domain 4	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01131	DNA topoisomerase (Topoisom_bac)	DNA topoisomerase	-	Family
A	PF01751	Toprim domain (Toprim)	Toprim domain	-	Family
A	PF13368	Topoisomerase C-terminal repeat (Toprim_C_rpt)	Topoisomerase C-terminal repeat	This domain is repeated up to five times to form the C-terminal region of bacterial topoisomerase immediately downstream of the zinc-finger motif.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA topoisomerase 1	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding DNA 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 cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding DNA 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 enzyme regulator activity molecular function inhibitor activity molecular function regulator activity nuclease inhibitor activity enzyme inhibitor activity ribonuclease inhibitor activity	cellular process cell cycle chromosome segregation cell cycle process 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 metabolic process cellular process cell cycle chromosome segregation cell cycle process 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 metabolic process cellular component organization or biogenesis macromolecule metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane membrane external encapsulating structure cell wall peptidoglycan-based cell wall

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR013497	DNA topoisomerase, type IA, central	Domain
A	IPR003602	DNA topoisomerase, type IA, DNA-binding domain	Domain
A	IPR023405	DNA topoisomerase, type IA, core domain	Homologous Superfamily
A	IPR013825	DNA topoisomerase, type IA, central region, subdomain 2	Homologous Superfamily
A	IPR003601	DNA topoisomerase, type IA, domain 2	Domain
A	IPR025589	Topoisomerase C-terminal repeat	Repeat
A	IPR028612	DNA topoisomerase I, type IA	Family
A	IPR000380	DNA topoisomerase, type IA	Family
A	IPR013826	DNA topoisomerase, type IA, central region, subdomain 3	Homologous Superfamily
A	IPR006171	TOPRIM domain	Domain
A	IPR023406	DNA topoisomerase, type IA, active site	Active Site
A	IPR005733	DNA topoisomerase I, bacterial-type	Family
A	IPR034149	DNA topoisomerase 1, TOPRIM domain	Domain
A	IPR013824	DNA topoisomerase, type IA, central region, subdomain 1	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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.