ALX/FPR2 激活 D1 溶解素的立体异构体,通过分子动力学模拟进行解
Vinicius S Nunes1,2, Odonírio Abrahão2, Alexandre P Rogério3
1Laboratório Nacional de Computação Científica, Petrópolis, Rio de Janeiro, 25651-076, Brasil.
The journal of physical chemistry. B
|July 10, 2023
概括
瑞索尔D1 (RvD1) 和阿司匹林触发的RvD1 (AT-RvD1) 通过ALX/FPR2受体解决炎症. 与AT-RvD1相比,RvD1保持了受体在活性状态的时间更长,突出了药物开发的关键相互作用部位.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 慢性炎症是许多疾病的基础.
- 专门的亲溶解媒介 (SPMs),包括溶解蛋白D1 (RvD1) 和由阿司匹林触发的RvD1 (AT-RvD1),来自多可萨赫萨酸 (DHA),对于炎症解决至关重要.
- 甲基受体2型 (ALX/FPR2),一种G蛋白结合受体 (GPCR),参与调解RvD1和AT-RvD1.1的影响.
研究的目的:
- 研究ALX/FPR2及其配体RvD1和AT-RvD1.1之间的分子相互作用.
- 使用分子动力学模拟,比较由RvD1与AT-RvD1诱导的受体激活动态.
- 为了确定ALX/FPR2中关键的残留物,负责这些溶解素的结合和激活.
主要方法:
- 对两个复合体进行了44微秒的分子动力学模拟:FPR2@AT-RvD1和FPR2@RvD1.
- 在所有模拟框架中分析了受体构造状态 (活跃与非活跃).
- 确定和描述了特定的残留物相互作用,并计算了结合的自由能量.
主要成果:
- 在AT-RvD1存在时,ALX/FPR2受体在62%的时间内保持活跃状态,在RvD1存在时则保持活跃状态74%.
- 在所有模拟中,ALX/FPR2的R201和R205残留物始终与RvD1和AT-RvD1相互作用.
- 与AT-RvD1相比,RvD1与R201和R205的结频率更高,将其确定为关键受体热点.
结论:
- 与AT-RvD1.1相比,RvD1维持ALX/FPR2受体激活的时间更长.
- 其余物R201和R205被确定为ALX/FPR2受体内的RvD1和AT-RvD1结合的关键相互作用点 (热点).
- 这些发现为SPMs对ALX/FPR2的差异激活机制提供了宝贵的见解,可能指导新型抗炎疗法的开发.
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