相关实验视频
Updated: May 8, 2026
05:48
Rapid Generation of Amyloid from Native Proteins In vitro
Published on: December 5, 2013
6.1K
使用AI生成粉样纤维的多态景观:RibbonFold
Liangyue Guo1, Qilin Yu1, Di Wang1
1Changping Laboratory, Beijing 102206, China.
概括
由人工智能驱动的RibbonFold可以预测多样化的粉样蛋白结构,性能优于现有的工具. 这促进了对粉样蛋白多态和蛋白质折叠景观的理解.
科学领域:
- 生物物理学的生物物理.
- 计算生物学 计算生物学
- 结构生物学 结构生物学
背景情况:
- 蛋白质折叠通常通过导致原生状态的能量景观来理解,正如AlphaFold在结构预测方面的成功所示.
- 与典型蛋白质不同的是,粉样蛋白结构不局限于单个本地折叠,并表现出受序列和实验条件影响的多态性,这对预测构成了挑战.
研究的目的:
- 开发和验证一种基于人工智能的方法,RibbonFold,用于预测粉样原纤维的结构多态性.
- 为了探索可能的粉样原纤维结构的景观,使用并行,在注册表堆叠模型.
主要方法:
- 通过结合并行注册限制和多态损失函数来适应AlphaFold2.
- 应用RibbonFold来预测各种序列的原纤维结构,包括众所周知的粉样蛋白形成的序列和随机混合的序列.
- 在独立测试集上使用TM-score评估预测准确性.
主要成果:
- 在独立的测试组中,RibbonFold获得了0.5的平均TM分数,在独立的测试组中表现优于AlphaFold2/3.
- 该方法有效地捕获了已知多态的已知粉样蛋白序列.
- 分析显示,与已知的粉样蛋白序列相比,具有相似组成的随机混合序列的相对溶解度降低.
结论:
- RibbonFold是一个强大的框架,用于预测粉样原纤维结构和表征其多态景观.
- 该研究强调了粉样蛋白结构的依赖序列和条件的性质,并提供了关于溶解度的随机序列的负选择的见解.
- 带折叠 (RibbonFold) 推进了粉样多态的结构特征.
相关概念视频
01:22Protein Folding
Overview
01:22Protein Folding
Overview
03:03Amyloid Fibrils
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
01:25Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
03:03Amyloid Fibrils
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...