对力场的基准测试,以描述内在无序的R2-FUS-LC区域
Maud Chan-Yao-Chong1,2, Justin Chan1, Hidetoshi Kono3
1Molecular Modeling and Simulation (MMS) Team, Institute for Quantum Life Science, National Institutes for Quantum Science and Technology (QST), 4-9-1, Anagawa, Inage Ward, Chiba City, Chiba, 263-8555, Japan.
Scientific reports
|August 30, 2023
概括
这项研究评估了13个内在失调蛋白 (IDP) 的力场,这些蛋白质与ALS等疾病有关. 与mTIP3p水模型的c36m2021s3p力场展示了最平衡的结构生成和效率.
科学领域:
- 生物化学和分子生物学
- 计算生物学 计算生物学
- 结构生物学 结构生物学
背景情况:
- 本质性失调蛋白 (IDP) 在阿尔茨海默氏症和ALS等疾病中至关重要,通常形成粉样纤维.
- 对于模拟IDP,特别是像FUS-LC领域这样的灵活区域的力场 (FFs) 的准确性仍然是一个挑战.
- 现有的FF,开发用于球状蛋白,在应用到IDP时显示出可变的性能.
研究的目的:
- 综合评估13个不同的FF的性能,以模拟FUS-LC域的R2区域 (R2-FUS-LC),与ALS相关的IDP.
- 确定最适合的FF用于准确预测IDP的构造组合.
- 为了比较AMBER和CHARMM FFs的计算效率和形状准确性.
主要方法:
- 在R2-FUS-LC区域使用13个不同的FF进行了分子动力学模拟.
- 用多个指标来评估本地和全球蛋白质构造.
- 开发了一个综合评分系统,以提供对每个FF的绩效的整体评估.
主要成果:
- c36m2021s3p FF与mTIP3p水模型相结合,成为最平衡的水模型,产生了与实验数据相一致的多样化构造.
- 与排名最高的AMBER FF中的四个站点水模型相比,mTIP3p水模型提供了更高的计算效率.
- 珀FF往往比CHARMMFF产生更紧的结构和非本地接触,而两者都在相互接触方面扎.
结论:
- c36m2021s3p/mTIP3p组合代表了一个有前途的FF用于模拟像FUS-LC地区这样的IDP.
- 多度量评估对于准确评估灵活的IDP的FF至关重要.
- 需要进一步完善FFs,特别是为了准确地建模IDP中的间相互作用.
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