在溶液中,固态中和Hsp90结合部位上的联结体构成之间的关系:凝丹胺素和放射性
Pahk Thepchatri1, Tomasso Eliseo, Daniel O Cicero
1Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
Journal of the American Chemical Society
|February 28, 2007
概括
了解溶液中的分子灵活性如何影响药物结合至关重要. 这项研究表明,溶液形状准确地预测了热冲击蛋白90 (Hsp90) 抑制剂的药物结合姿势.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 计算化学计算化学
背景情况:
- 由于分子的动态性质,预测药物向相互作用具有挑战性.
- 受体环境显著影响连接体构造,使生物活性构造的预测变得复杂.
- 热冲击蛋白90 (Hsp90) 是癌症治疗的关键标,了解其结合对象至关重要.
研究的目的:
- 为了研究一个分子在溶液中的构造组合是否可以预测其生物活性构造对蛋白质的结合.
- 通过实验方法确定凝胺素和雷迪科尔的生物活性对应物.
- 通过将它们对接到Hsp90结构中来验证这些溶液构造.
主要方法:
- 利用溶液中分子灵活性的NMR分析 (NAMFIS) 方法来分析分子组合.
- 解密的NMR光谱,以识别个体构造及其溶液中的群体.
- 采用GLIDE对接和MM-GBSA评分来预测已识别的合格者的约束姿势.
主要成果:
- 在CDCl3溶液中确定了凝胺氨酸 (4%的人口) 和基醇 (21%的人口) 的特定生物活性适应物.
- 这些NAMFIS衍生型体,当与Hsp90结构对接时,成功地重现了实验确定的结合姿势.
- 证明了溶液状态结构分析对预测蛋白质 - 配体相互作用的实用性.
结论:
- 一个分子在溶液中的构造组合含有可活的蛋白质结合候选者.
- 纳姆菲斯方法有效地识别了与药物发现相关的生物活性构造.
- 溶液衍生的对应体的计算对接提供了一个准确的方法来预测药物结合姿势,即使没有定义的受体结构.
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