揭示突变AR-LBD中的联结体诱导的构造变化:分子动力学的洞察力
Madiha Sardar1, Nadeem Ahmad1, Mamona Mushtaq2
1H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
Journal of chemical information and modeling
|August 22, 2025
概括
雄激素受体 (AR) 突变可以将AR从对抗状态转变为对抗状态,从而降低前列腺癌治疗的疗效. 这项研究揭示了AR-LBD突变如何改变协活性剂相互作用,推动这种转变并提供新的治疗点.
科学领域:
- 分子生物学和结构生物学
- 计算生物物理
- 癌症研究
背景情况:
- 雄激素受体 (AR) 对基因表达,性表型和前列腺癌 (PCa) 的发展至关重要.
- 像DHT这样的激动剂的AR激活涉及形状变化和协同激活剂相互作用.
- 抗逆转录抗剂 (例如阿帕胺) 治疗PCa,但由于AR-LBD突变可能失去有效性.
研究的目的:
- 调查突变AR-LBD中的联体诱导的形状变化.
- 阐明这些变化对AR同活性剂相互作用的影响.
- 了解AR抗体转化为抗体状态的机制.
主要方法:
- 多重复制的分子动力学模拟 (总计10.5μs).
- 对形状变化和AR同活性剂相互作用的分析.
- 自由能源分解计算,动态交叉相关矩阵,主要组件分析和自由能源景观计算.
主要成果:
- DHT稳定了AR激活功能-2 (AF-2) 区域,促进了同活性剂的相互作用.
- 反抗剂诱导螺旋12的变化,破坏了协同激活剂的相互作用.
- F876L和T877A突变改变了全性通路,可能将AR- apalutamide复合物转化为激进状态.
- AR突变系统表现出比对抗性AR具有更高的结合亲和力,受静电相互作用和形态的影响.
结论:
- 通过改变AR和AF-2结构,AR-LBD的点突变将AR从对抗状态转变为对抗状态.
- 这种转变导致持续的协同激活剂招募和持续的AR活性,从而降低了治疗效果.
- 这些发现为AR-协同激活剂相互作用提供了洞察力,有助于开发抗割前列腺癌的治疗方法.
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