DNA topoisomerase
| DNA topoisomerase | |||||||||
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| Identifiers | |||||||||
| EC number | 5.99.1.2 | ||||||||
| CAS number | 80449-01-0 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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| Search | |
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| PMC | articles |
| PubMed | articles |
| NCBI | proteins |
DNA topoisomerase (EC 5.99.1.2, type I DNA topoisomerase, untwisting enzyme, relaxing enzyme, nicking-closing enzyme, swivelase, omega-protein, deoxyribonucleate topoisomerase) is an enzyme with systematic name DNA topoisomerase. This enzyme catalyses the following chemical reaction
These enzymes bring about the conversion of one topological isomer of DNA into another. There are two types of DNA topoisomerase; I and II. Both of which are further classified into sub families IA, IB, IIA, and IIB. DNA topoisomerase facilitates a transesterification reaction. Through this reaction DNA topoisomerase is able to break and rejoin the phosphate backbone of DNA.
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