DNA topoisomerase
An enzyme capable of altering the degree of supercoiling of double-stranded DNA molecules. Various topoisomerases can increase or relax supercoiling, convert single-stranded rings to intertwined double-stranded rings, tie and untie knots in single stranded and duplex rings, catenate and decatenate duplex rings. Topoisomerase II of E. coli = gyrase.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • DNA topoisomerase — DNA topo·isom·er·ase (to″po i somґər ās) [EC 5.99.1.2] an enzyme of the isomerase class that catalyzes the ATP independent breakage, passage, and rejoining of a single strand of DNA, altering the topology of the molecule by single …   Medical dictionary

  • DNA topoisomerase (ATP-hydrolyzing) — DNA topo·isom·er·ase (ATP hy·dro·lyz·ing) (to″po i somґər ās hiґdro li zing) [EC 5.99.1.3] an enzyme of the isomerase class that catalyzes the ATP dependent breakage, passage, and rejoining of both strands of a DNA helix… …   Medical dictionary

  • Topoisomerase IV — is one of two type II topoisomerases in bacteria, the other being DNA gyrase. Like gyrase, topoisomerase IV is able to pass one double strand of DNA through another double strand of DNA, thereby changing the linking number of DNA by two in each… …   Wikipedia

  • DNA-relaxing enzyme — DNA relaxing enzyme. = DNA topoisomerase (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • DNA-relaxing enzyme — DNA relaxing enzyme. = DNA topoisomerase (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • DNA gyrase — DNA gy·rase (jiґrās) DNA topoisomerase (ATP hydrolyzing) …   Medical dictionary

  • Topoisomerase — Topoisomerasen Bezeichner Externe IDs CAS Nummer …   Deutsch Wikipedia

  • Topoisomerase I — Topoisomerasen Typ I Topoisomerase an DNA …   Deutsch Wikipedia

  • Topoisomerase II — Topoisomerasen TypII Bezeichner Externe IDs CAS Num …   Deutsch Wikipedia

  • DNA-Replikation — DNA Replikation. Die Doppelhelix wird durch die Helicase und die Topoisomerase geöffnet. Danach setzt die Primase einen Primer und die …   Deutsch Wikipedia

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