对ATP稳定TDP-43原纤维细胞的原子洞察
Zhengdong Xu1, Jiaxing Tang2, Yehong Gong3
1Department of Physical Education, Shanghai University of Engineering Science, 333 Long Teng Road, Shanghai 201620, People's Republic of China.
Journal of chemical information and modeling
|September 18, 2024
概括
腺三酸盐 (ATP) 稳定了与ALS有关的有毒TDP-43蛋白聚合物. 分子动力学模拟显示,ATP结合增强了TDP-43纤维的形成和稳定性,为神经退行性疾病提供了潜在的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 计算生物学 计算生物学
背景情况:
- 运动神经元中TDP-43聚合物的异常积累是ALS的一个关键病理特征.
- 氨酸三酸盐 (ATP) 之前曾被认为会影响TDP-43的聚合,但机制尚不清楚.
研究的目的:
- 为了研究TDP-43纤维细胞形成的临界核大小.
- 阐明ATP对TDP-43原纤维细胞稳定性的影响.
- 揭示ATP-TDP-43相互作用背后的分子机制.
主要方法:
- 进行了20μs的原子分子动力学 (MD) 模拟.
- 分析了TDP-43282-360纤维细胞形成的临界核大小.
- 研究了ATP分子与TDP-43282-360原纤维细胞的结合.
主要成果:
- 确定了三元体作为关键核和四元体作为TDP-43282-360纤维细胞形成的最小稳定核.
- 证明ATP结合通过增加β片含量和键形成来巩固TDP-43282-360原纤维.
- 透露的ATP主要与TDP-43282-360原纤维的N端结合,其中R293是关键残留物,通过各种非共价相互作用.
结论:
- 通过ATP解码了TDP-43282-360寡合物的详细稳定机制.
- 这些发现提供了关于ATP在TDP-43聚合中的作用的见解.
- 表明了针对ALS的药物设计的潜在新途径.
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