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by Keyword: Topoisomerase


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Pla, D., Sischka, A., Albericio, F., Alvarez, M., Fernàndez-Busquets, X., Anselmetti, D., (2009). Optical-tweezers study of topoisomerase inhibition Small 5, (11), 1269-1272

Optical tweezers force-stretching of highly nicked dsDNA, as indicated by the large hysteresis area (black and red curves). Topoisomerase activity is evidenced by a higher level plateau and a complete vanishing of the overstretching hysteresis (green curve), indicating total repair of the DNA nicks. The arrow indicates a drop in the stretching curve resulting from topoisomerase cleavage during the cycle.

Keywords: Atomic force microscopy, DNA, Lamellarin D, Optical tweezers, Topoisomerase