Investigation of the elasticity of a cisplatin-DNA adduct via single-molecule measurements and bimodal modeling

Nam Kyung Lee, Jin Sung Park, Albert Johner, Sergei Obukhov, Ju Yong Hyon, Kyoung Jin Lee, Seok Cheol Hong

Research output: Contribution to journalArticle

11 Citations (Scopus)


Cisplatin has been known as an anticancer drug for a long time. It is therapeutically active upon binding to DNA. A double-bound cisplatin bends DNA into a localized kink. We model the elastic properties of cisplatin-DNA adducts at moderate tension (<6pN). It is shown that from the mechanical point of view the action of cisplatin can be revealed by reduced persistence length. We derived two expressions for the persistence length, which apply in the linear-response and the strong-force regimes, respectively. Experimental data for DNA adducts stretched by magnetic tweezers are consistently fitted by these expressions. This allows us to estimate the degree of platination at various salt concentrations.

Original languageEnglish
Article number041921
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number4
Publication statusPublished - 2009 Apr 1


ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

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