CATH Classification

Domain Context

CATH Clusters

Superfamily 3.40.50.140
Functional Family DNA topoisomerase 1

Enzyme Information

5.99.1.2
DNA topoisomerase.
based on mapping to UniProt P06612
ATP-independent breakage of single-stranded DNA, followed by passage and rejoining.
-!- Brings about the conversion of one topological isomer of DNA into another, e.g. the relaxation of superhelical turns in DNA, the interconversion of simple and knotted rings of single-stranded DNA, and the intertwisting of single-stranded rings of complementary sequences (cf. EC 5.99.1.3).

UniProtKB Entries (1)

P06612
TOP1_ECOLI
Escherichia coli K-12
DNA topoisomerase 1

PDB Structure

PDB 1ECL
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Three-dimensional structure of the 67K N-terminal fragment of E. coli DNA topoisomerase I.
Lima, C.D., Wang, J.C., Mondragon, A.
Nature