小分子的单体结合模式调节hIAPP粉样蛋白形成的动力学
Michelle Garcia1, Korey M Reid1, Paul Robustelli1
1Dartmouth College, Department of Chemistry, Hanover, NH, 03755.
bioRxiv : the preprint server for biology
|October 3, 2025
概括
小分子可以抑制或加速人类小岛粉样蛋白多 (hIAPP) 聚合,这是II型糖尿病 (T2D) 的关键因素. 分子动力学模拟揭示了这些分子如何与hIAPP单体结合,为T2D药物开发提供了洞察力.
科学领域:
- 生物物理学和计算化学
- 分子动力学模拟模型
- 蛋白质聚合和疾病
背景情况:
- 在胰腺β细胞中的人类小岛粉样蛋白聚 (hIAPP) 聚合与II型糖尿病 (T2D) 有关.
- 调节hIAPP聚合动态的小分子是潜在的T2D治疗方法,但它们的机制尚不清楚.
研究的目的:
- 阐明hIAPP聚合抑制剂 (YX-I-1) 和加速剂 (YX-A-1) 对野生型和S20GhIAPP单体的结合机制.
- 为小分子对hIAPP聚合途径的影响提供结构和机制的理由.
主要方法:
- 利用了全原子分子动力学计算机模拟.
- 分析了YX-I-1和YX-A-1与野生类型和S20G hIAPP单体的结合亲和力和相互作用.
- 在连接体结合时特征化的形状变化.
主要成果:
- 抑制剂 (YX-I-1) 与加速剂 (YX-A-1) 相比,对单体野生型hIAPP的结合亲和力显著更高.
- 在结合时观察到不同的埋藏和暴露于溶剂的配体部分,在抑制剂和加速剂之间有所不同.
- 确定了稳定对野生类型和S20G hIAPP变种的连接物结合的特定相互作用.
结论:
- 分子动力学模拟为小分子如何与hIAPP单体相互作用提供了机制基础.
- 假设埋藏的配体部分驱动单体结合亲和力,而暴露的部分调节聚合动力学.
- 这些发现为设计基于hIAPP聚合调制的向T2D治疗提供了基础.
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