Oxaliplatin and its enantiomer induce different condensation dynamics of single DNA molecules.

Oxaliplatin and its enantiomer induce different condensation dynamics of single DNA molecules.
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奥沙利铂及其对映体诱导单个 DNA 分子的不同缩合动力学

DOI:
10.1371/journal.pone.0071556
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Wang PY
Wang PY
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhang HY;Liu YR;Ji C;Li W;Dou SX;Xie P;Wang WC;Zhang LY;Wang PY

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用磁镊和原子力显微镜研究了奥沙利铂(Pt(R,R-DACH))及其对映体(Pt(S,S-DACH))与DNA的相互作用。在Pt-DACH诱导的DNA缩合过程中,低浓度Pt-DACH只形成双加合物和微环,而高浓度Pt-DACH除了形成双加合物和微环外,还形成长程交联。Pt(R,R-DACH)的二加合物生成速率高于Pt(S,S-DACH)。然而,Pt(S,S-DACH)的微环和长程交联的比例高于Pt(R,R-DACH)。我们提出了一个模型来解释Pt(R,R-DACH)和Pt(S,S-DACH)对DNA缩合的影响之间的差异。该研究对于理解手性对Pt-DACH与DNA相互作用的影响以及铂配合物诱导的DNA缩合动力学具有重要意义。
The interactions of DNA with oxaliplatin (Pt(R,R-DACH)) or its enantiomer (Pt(S,S-DACH)) were investigated using magnetic tweezers and atomic force microscope. In the process of DNA condensation induced by Pt-DACH, only diadducts and micro-loops are formed at low Pt-DACH concentrations, while at high Pt-DACH concentrations, besides the diadducts and micro-loops, long-range cross-links are also formed. The diadduct formation rate of Pt(R,R-DACH) is higher than that of Pt(S,S-DACH). However, the proportions of micro-loops and long-range cross-links for Pt(S,S-DACH) are higher than those for Pt(R,R-DACH). We propose a model to explain these differences between the effect of Pt(R,R-DACH) and that of Pt(S,S-DACH) on DNA condensation. The study has strong implications for the understanding of the effect of chirality on the interaction between Pt-DACH and DNA and the kinetics of DNA condensation induced by platinum complexes.
DOI: 10.1093/nar/20.2.267
发表时间: 1992-01-25
影响因子: 14.9
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