Term Name:	DNA topoisomerase type I (single strand cut, ATP-independent) activity
Synonyms:	deoxyribonucleate topoisomerase, DNA topoisomerase I activity, nicking-closing enzyme activity, omega-protein activity, relaxing enzyme activity, swivelase activity, topoisomerase, type I DNA topoisomerase activity, type I topoisomerase activity, untwisting enzyme activity
Definition:	Catalysis of a DNA topological transformation by transiently cleaving one DNA strand at a time to allow passage of another strand; changes the linking number by +1 per catalytic cycle.
Ontology:	GO: Molecular Function [GO:0003917]    QuickGO    AmiGO