一个含有强效抗天花病毒药物cidofovir的DNA复合体的溶液结构
Olivier Julien1, James R Beadle, Wendy C Magee
1Department of Biochemistry, University of Alberta, 4-19 Medical Sciences Building, Edmonton, Alberta T6G 2H7, Canada.
Journal of the American Chemical Society
|February 2, 2011
概括
抗病毒药物cidofovir (CDV) 集成到DNA中,影响DNA复制和合成. 结构分析显示,CDV是适应的,但降低了DNA双重稳定性,表明动态增加.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 齐多福维尔 (CDV) 是一种强大的抗病毒药物,可以抑制正正病毒病毒的DNA复制.
- 将CDV纳入DNA阻碍了DNA聚合酶活性和转变损伤合成.
- CDV模仿脱氧化丁,但缺乏脱氧糖糖,具有3'-基相应的非循环酸盐.
研究的目的:
- 为了阐明将cidofovir (CDV) 纳入DNA复合体的结构后果.
- 为了比较含有CDV的DNA复合体与控制复合体的溶液结构和稳定性.
主要方法:
- 使用1H NMR光谱测定溶液结构.
- 对伊米诺质子动态和化学转移的分析.
- 通过循环二元化 (CD) 监控的DNA双重化实验.
主要成果:
- 含有CDV的DNA复合体的整体结构与对照组相似.
- 核磁共振数据表明,在内置的CDV分子周围增加了质子交换率.
- 循环二元化化实验显示,CDV双层 (46°C) 的化温度 (Tm) 与对照 (58°C) 相比较低.
结论:
- 齐多福维尔 (CDV) 在结构上适应于DNA复合体内.
- CDV的存在导致DNA双重稳定性的降低和局部动态的增加.
- 这些发现提供了关于CDV作为抗病毒DNA复制抑制剂的作用机制的见解.
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