Annotations: 4ELY

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4elya_	Multi-domain proteins (alpha and beta)	Type II DNA topoisomerase C-terminal domain-like	Type II DNA topoisomerase C-terminal domain-like	Type II DNA topoisomerase C-terminal domain-like	automated matches	(Shigella flexneri ) [TaxId: 623 ],	SCOPe (2.08)
B	d4elyb_	Multi-domain proteins (alpha and beta)	Type II DNA topoisomerase C-terminal domain-like	Type II DNA topoisomerase C-terminal domain-like	Type II DNA topoisomerase C-terminal domain-like	automated matches	(Shigella flexneri ) [TaxId: 623 ],	SCOPe (2.08)
C	d4elyc_	All beta proteins	SH3-like barrel	Cell growth inhibitor/plasmid maintenance toxic component	CcdB	CcdB	(Aliivibrio fischeri ) [TaxId: 668 ],	SCOPe (2.08)
D	d4elyd_	All beta proteins	SH3-like barrel	Cell growth inhibitor/plasmid maintenance toxic component	CcdB	CcdB	(Aliivibrio fischeri ) [TaxId: 668 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	Cell growth inhibitor/plasmid maintenance toxic component	8082645	3000352	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Cell growth inhibitor/plasmid maintenance toxic component	8082645	3000352	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DNA_topoisoIV_3rd	e4elyA2	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)
B	DNA_topoisoIV_3rd	e4elyB2	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)
C	CcdB	e4elyC1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: CcdB	ECOD (1.6)
D	CcdB	e4elyD1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: CcdB	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.268.10	Mainly Alpha	Orthogonal Bundle	Topoisomerase	domain 3	CATH (4.3.0)
B	1.10.268.10	Mainly Alpha	Orthogonal Bundle	Topoisomerase	domain 3	CATH (4.3.0)
C	2.30.30.110	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
D	2.30.30.110	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C, D	PF01845	CcdB protein (CcdB)	CcdB protein	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	DNA gyrase subunit A	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 DNA negative supercoiling 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	response to stimulus response to chemical response to antibiotic nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process chromosome organization DNA conformation change cellular component organization response to stimulus response to chemical response to antibiotic nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process chromosome organization DNA conformation change cellular component organization DNA topological change organelle organization cellular process cellular component organization or biogenesis	intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle chromosome cellular anatomical entity non-membrane-bounded organelle cytoplasm
C, D	CcdB	enzyme regulator activity molecular function inhibitor activity DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) inhibitor activity molecular function regulator activity enzyme inhibitor activity DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) regulator activity ATPase inhibitor activity ATPase regulator activity	cellular process plasmid maintenance	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR035516	DNA gyrase/topoisomerase IV, subunit A, C-terminal	Homologous Superfamily
A, B	IPR050220	Type II DNA Topoisomerases	Family
A, B	IPR013760	DNA topoisomerase, type IIA-like domain superfamily	Homologous Superfamily
A, B	IPR013757	DNA topoisomerase, type IIA, alpha-helical domain superfamily	Homologous Superfamily
A, B	IPR013758	DNA topoisomerase, type IIA, domain A, alpha-beta	Homologous Superfamily
A, B	IPR005743	DNA gyrase, subunit A	Family
A, B	IPR006691	DNA gyrase/topoisomerase IV, subunit A, C-terminal repeat	Repeat
A, B	IPR002205	DNA topoisomerase, type IIA, domain A	Domain
C, D	IPR011067	Plasmid maintenance toxin/Cell growth inhibitor	Homologous Superfamily
C, D	IPR002712	Toxin CcdB	Family

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.