Skip to main content

 3IGC | pdb_00003igc

Smallpox virus topoisomerase-DNA transition state

External Resource: Annotation


Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AGST_Ne3igcA1 A: alpha arraysX: Immunoglobulin-like beta-sandwichH: HTHT: winged helix domainF: GST_NECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.66.10 Alpha Beta 2-Layer Sandwich Viral Topoisomerase I DNA topoisomerase I domainCATH (4.3.0)
A3.90.15.10 Alpha Beta Alpha-Beta Complex Topoisomerase I Chain A, domain 3CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF09266Viral DNA topoisomerase I, N-terminal (VirDNA-topo-I_N)Viral DNA topoisomerase I, N-terminalMembers of this family are predominantly found in viral DNA topoisomerase, and assume a beta(2)-alpha-beta-alpha-beta(2) fold, with a left-handed crossover between strands beta2 and beta3 [1]. Domain
PF01028Eukaryotic DNA topoisomerase I, catalytic core (Topoisom_I)Eukaryotic DNA topoisomerase I, catalytic coreTopoisomerase 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

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
5'-D(*CP*GP*GP*AP*AP*TP*AP*AP*GP*GP*GP*CP*GP*AP*CP*A)-3'---
5'-D(*AP*TP*TP*CP*C)-3'---
5'-D(*GP*TP*GP*TP*CP*GP*CP*CP*CP*TP*T)-3'---
DNA topoisomerase 1 -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR035447DNA topoisomerase I, N-terminal domain superfamilyHomologous Superfamily
IPR011010DNA breaking-rejoining enzyme, catalytic coreHomologous Superfamily
IPR001631DNA topoisomerase IFamily
IPR013500DNA topoisomerase I, catalytic core, eukaryotic-typeDomain
IPR014711DNA topoisomerase I, catalytic core, alpha-helical subdomain, eukaryotic-typeHomologous Superfamily
IPR018521DNA topoisomerase IB, active siteActive Site
IPR015346DNA topoisomerase I, N-terminal, viralDomain