Annotations: 2F4Q

Crystal Structure of Deinococcus radiodurans topoisomerase IB

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A		e2f4qA1	A: alpha arrays	X: POZ domain	H: POZ domain	T: POZ domain	F:	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.66.10	Alpha Beta	2-Layer Sandwich	Viral Topoisomerase I	DNA topoisomerase I domain	CATH (4.3.0)
A	1.10.132.120	Mainly Alpha	Orthogonal Bundle	Topoisomerase I	Chain A, domain 4	CATH (4.3.0)
A	3.90.15.10	Alpha Beta	Alpha-Beta Complex	Topoisomerase I	Chain A, domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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
A	PF21338	Bacterial DNA topoisomerase IB, N-terminal domain (Top1B_N_bact)	Bacterial DNA topoisomerase IB, N-terminal domain	This domain is found at the N-terminal end of Type I topoisomerase from Deinococcus radiodurans and similar bacterial sequences. This small-sized protein modify DNA topology by cleaving and resealing one strand of duplex DNA. This domain compris ...	This domain is found at the N-terminal end of Type I topoisomerase from Deinococcus radiodurans and similar bacterial sequences. This small-sized protein modify DNA topology by cleaving and resealing one strand of duplex DNA. This domain comprises three alpha-helices plus a five strand antiparallel beta-sheet [1]. It is found associated with Pfam:PF01028.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	type I topoisomerase, putative	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	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR035447	DNA topoisomerase I, N-terminal domain superfamily	Homologous Superfamily
A	IPR011010	DNA breaking-rejoining enzyme, catalytic core	Homologous Superfamily
A	IPR049331	DNA topoisomerase IB, N-terminal domain	Domain
A	IPR001631	DNA topoisomerase I	Family
A	IPR013500	DNA topoisomerase I, catalytic core, eukaryotic-type	Domain
A	IPR014711	DNA topoisomerase I, catalytic core, alpha-helical subdomain, eukaryotic-type	Homologous Superfamily