1SC7

Human DNA Topoisomerase I (70 Kda) In Complex With The Indenoisoquinoline MJ-II-38 and Covalent Complex With A 22 Base Pair DNA Duplex


ChainDomainClassArchitectureTopologyHomology
2.170.11.10 Mainly Beta Beta Complex DNA Topoisomerase I domain 2
2.170.11.10 Mainly Beta Beta Complex DNA Topoisomerase I domain 2
1.10.10.41 Mainly Alpha Orthogonal Bundle Arc Repressor Mutant, subunit A Yeast DNA topoisomerase - domain 1
3.90.15.10 Alpha Beta Alpha-Beta Complex Topoisomerase I Chain A, domain 3
1.10.132.10 Mainly Alpha Orthogonal Bundle Topoisomerase I Chain A, domain 4

Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
PF14370C-terminal topoisomerase domain (Topo_C_assoc)C-terminal topoisomerase domain- Family
PF02919Eukaryotic DNA topoisomerase I, DNA binding fragment (Topoisom_I_N)Eukaryotic DNA topoisomerase I, DNA binding fragment- Family
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 Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth B]
5'-D(*AP*AP*AP*AP*AP*GP*AP*CP*TP*T)-3'nonenonenone
C [auth D]
5'-D(*AP*AP*AP*AP*AP*TP*TP*TP*TP*TP*CP*CP*AP*AP*GP*TP*CP*TP*TP*TP*TP*T)-3'nonenonenone
DNA topoisomerase I
B [auth C]
5'-D(*(TGP)P*GP*AP*AP*AP*AP*AP*TP*TP*TP*TP*T)-3'nonenonenone

Protein Modification Annotation

Modified Residue(s)
ChainResidue(s)Description
PTR Parent Component: TYR

RESIDAA0039

PSI-MOD :  O4'-phospho-L-tyrosine MOD:00048
B [auth C]
TGP Parent Component: DG

RESIDAA0039