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绘制PPAR的Allosteric景观:一个马尔科夫状态建模和能量分析方法
Jiasheng Zhao1, Yuning Yang1, Zichen Zhang1
1MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China.
Journal of chemical information and modeling
|January 7, 2026
概括
过氧体增殖器激活受体γ (PPARγ) 的激活是通过联体诱导的构造变化来调节的. 这项研究揭示了连接物如何改变PPARγ动态,识别了关键残留物,并为设计选择性调制器提供了计算框架.
科学领域:
- 生物化学 生物化学
- 计算生物学 计算生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 过氧体增殖器激活受体γ (PPARγ) 对于代谢调节至关重要,其功能取决于连接体诱导的结构动力学.
- 精确的分子机制,通过这些精确的分子机制,不同的配体选择性地影响PPARγ的构造状态,尚未完全理解.
研究的目的:
- 通过综合计算方法阐明控制PPARγ激活和抑制的动态.
- 为了确定关键的残留物和分子相互作用,负责PPARγ中联体介导的 conformational选择.
- 为选择性PPARγ调节器的合理设计开发和验证一个计算框架.
主要方法:
- 广泛的分子动力学 (MD) 模拟和马尔科夫状态建模 (MSM) 用于分析PPARγ的结构格局.
- 进行了具有约束力的自由能量计算,以量化连接体-受体相互作用和热力学层次结构.
- 在ZINC20数据库中进行了MSM指导的虚拟选,用于前性验证.
主要成果:
- 通过改变 R2 和 R3 区域的动态枢纽,被证明联结会重塑 PPARγ 构造格局.
- 反对药物表现出最高的结合亲和力,主要是通过恐水相互作用限制Helix 12的移动性.
- 关键残留物Arg288和Ile341被确定为全网络中的关键节点,两个自然化合物被确定为潜在的调节器.
结论:
- 这项研究为PPARγ的形状选择机制提供了原子的洞察力,这种机制是由联体诱导的动态化驱动的.
- 这些发现强调了特定残留物和疏水相互作用在调节受体活性方面的重要性.
- 开发的计算框架可用于研究核受体中的全调节和设计新型治疗剂.
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