通过分子动力学和结合自由能量分析,阐明林加利普丁和纤维细胞激活蛋白结合机制
Mingsong Shi1,2, Fang Wang2, Zhou Lu1
1NHC Key Laboratory of Nuclear Technology Medical Transformation, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang, Sichuan 621099, China.
林格利普丁抑制纤维细胞激活蛋白 (FAP),这是固体癌症的标. 这项研究揭示了关键的相互作用,并建议进行结构修改,以增强利纳利普丁的作用.
科学领域:
- 生物化学 生化学
- 药理学 药理学是指药理学的学科.
- 结构生物学 结构生物学
背景情况:
- 纤维细胞激活蛋白 (FAP) 在固体瘤中高度表达,具有潜在的诊断和治疗点.
- 已知林加利普丁可以抑制FAP,但确切的相互作用机制需要阐明.
研究的目的:
- 为了研究林格利普丁和人类FAP之间的分子相互作用.
- 为了确定关键的残留物和结合方式,涉及到linagliptin-FAP复合体的形成.
- 引导林格利普丁的结构优化,以增强FAP抑制.
主要方法:
- 表面等离子体共振 (SPR) 分析以确定结合亲和力.
- 分子对接和相互作用分析以确定结合点和相互作用.
- 计算方法来估计结合的自由能量.
主要成果:
- 林格利普丁与人类FAP的结合自由能量估计为-13.66 kcal/mol,解离常数为243 nM.
- 确定了特定的键 (E203,E204,Y656与;Y625与碳) 和π-π相互作用 (W623,Y541).
- 观察到涉及butan组和几个残留物的疏水相互作用.
- 确定了两种潜在的FAP抑制剂 (ZINC000299754517和ZINC000299754576),其中包括:
结论:
- 林格利普丁通过结,π-π相互作用和疏水性相互作用的组合,对FAP表现出显著的结合亲和力.
- 结构优化,特别是在linagliptin的R1和R4区域,可以进一步提高其FAP结合亲和力.
- 这些发现为开发改进的FAP抑制剂用于癌症治疗提供了基础.
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