CYP27B1 p.R389H 突变对蛋白质稳定性和功能的影响:对多发性硬化症病原体的影响
Rizwan Ahmed Kiani1, Feroza Hamid Wattoo2, Muhammad Umer Khan3
1PMAS University of Arid Agriculture, Rawalpindi, Punjab, Pakistan.
Scientific reports
|September 26, 2025
概括
CYP27B1 p.R389H突变可能会破坏维生素D的新陈代谢和免疫功能,可能导致多发性硬化症 (MS) 的发展. 计算分析显示,这种遗传变异可能会损害蛋白质的稳定性和功能.
科学领域:
- 遗传学和分子生物学
- 生物化学 生物化学
- 计算生物学 计算生物学
背景情况:
- CYP27B1基因对维生素D代谢至关重要,影响免疫系统调节.
- 在CYP27B1中的遗传变异,如p.R389H突变 (rs118204009),正在研究它们对健康的潜在影响,包括与多发性硬化症 (MS) 的联系.
研究的目的:
- 通过计算评估CYP27B1 p.R389H突变的结构和功能后果.
- 评估这种突变在多发性硬化症的发病过程中的潜在作用.
主要方法:
- 使用AlphaFold和PyMOL进行3D蛋白质结构预测.
- 通过ERRAT2,VERIFY3D和Ramachandran分析进行结构验证.
- 使用I-Mutant,Mcsm,DDGun,DynaMut和Mupro进行稳定性预测.
- 使用PolyPhen-2,PhD-SNP,SNP&GO和SIFT进行功能影响评估.
- 使用ConSurf进行进化保护分析.
- 分子动力学模拟.分子动力学模拟.
主要成果:
- AlphaFold生成了一个高可信度的CYP27B1结构,将p.R389H突变 (阿尔金因替换为伊斯蒂丁) 定位在一个保存区域.
- 稳定性分析预测了突变的破坏性效应 (ΔΔG: -0.3至 -2.038 kcal/mol).
- 功能预测工具将p.R389H分类为"可能有害"和与疾病相关的,由分子动力学模拟支持,显示蛋白质稳定性和灵活性降低.
结论:
- 预计CYP27B1中的p.R389H突变会导致不稳定和功能损害.
- 这种突变可能会损害维生素D的新陈代谢,这表明它可能在多发性硬化症的发病过程中起作用.
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