Annotations: 2XKJ

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth E]	DNA_topoisoIV_1st	e2xkjE2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: DNA_topoisoIV_1st	ECOD (1.6)
A [auth E]	DNA_topoisoIV_3rd	e2xkjE4	A: alpha bundles	X: alpha-helical domain in type II DNA topoisomerase (From Topology)	H: alpha-helical domain in type II DNA topoisomerase (From Topology)	T: alpha-helical domain in type II DNA topoisomerase	F: DNA_topoisoIV_3rd	ECOD (1.6)
A [auth E]	DNA_topoisoIV_2nd_1	e2xkjE3	A: a+b two layers	X: a+b domain in type II DNA topoisomerase (From Topology)	H: a+b domain in type II DNA topoisomerase (From Topology)	T: a+b domain in type II DNA topoisomerase	F: DNA_topoisoIV_2nd_1	ECOD (1.6)
A [auth E]	DNA_gyraseB_C	e2xkjE1	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: Toprim domain	F: DNA_gyraseB_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth E]	3.40.50.670	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth E]	PF00521	DNA gyrase/topoisomerase IV, subunit A (DNA_topoisoIV)	DNA gyrase/topoisomerase IV, subunit A	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E]	TOPOISOMERASE IV	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding DNA binding nucleic acid binding ATP-dependent activity, acting on DNA isomerase activity catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid DNA topoisomerase activity DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) activity catalytic activity ATP-dependent 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	intracellular organelle cellular anatomical structure intracellular anatomical structure organelle membraneless organelle intracellular membraneless organelle chromosome cytoplasm DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) complex protein-containing complex catalytic complex cell periphery extrinsic component of plasma membrane membrane intracellular organelle cellular anatomical structure intracellular anatomical structure organelle membraneless organelle intracellular membraneless organelle chromosome cytoplasm DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) complex protein-containing complex catalytic complex cell periphery extrinsic component of plasma membrane membrane plasma membrane extrinsic component of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E]	IPR035516	DNA gyrase/topoisomerase IV, subunit A, C-terminal	Homologous Superfamily
A [auth E]	IPR050220	Type II DNA Topoisomerases	Family
A [auth E]	IPR013760	DNA topoisomerase, type IIA-like domain superfamily	Homologous Superfamily
A [auth E]	IPR013757	DNA topoisomerase, type IIA, alpha-helical domain superfamily	Homologous Superfamily
A [auth E]	IPR013758	DNA topoisomerase, type IIA, domain A, alpha-beta	Homologous Superfamily
A [auth E]	IPR005742	DNA topoisomerase IV, subunit A, Gram-negative	Family
A [auth E]	IPR006691	DNA gyrase/topoisomerase IV, subunit A, C-terminal repeat	Repeat
A [auth E]	IPR002205	DNA topoisomerase, type IIA, domain A	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.