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从残余二极合和分子模拟中鉴定出的原生未折叠的陶蛋白中高度人口密集的转变形状
Marco D Mukrasch1, Phineus Markwick, Jacek Biernat
1Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany.
Journal of the American Chemical Society
|March 28, 2007
概括
陶氏蛋白质是一种陶氏蛋白质.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 结构生物学 结构生物学
背景情况:
- 陶蛋白对神经元微管组织至关重要.
- 在阿尔茨海默病和其他神经退行性疾病中,异常的积形成神经纤维状.
- 在健康和病态的之间结构性过渡是不太了解的.
研究的目的:
- 为了研究蛋白重复域的结构动态.
- 了解tau的依赖序列的结构偏好.
- 阐明这些偏好在的过渡到病态形式中的作用.
主要方法:
- 核磁共振 (NMR) 光谱 (剩余二极合器,J合器,核重复器增强器).
- 加快分子动力学 (AMD) 模拟在明确溶剂中.
- 统计线圈模型包含实验和模拟数据.
主要成果:
- 实验性NMR数据 (RDC) 与展开蛋白质的统计模型的预测进行了比较.
- 在tau重复域 (R1-R4) 内的特定同类序列显示出与预测的构造有显著的偏差,形成稳定的β转.
- AMD模拟证实了这些局部的回转形成趋势,即使在变质条件下 (8M尿素) 也持续存在.
结论:
- 在tau内部的特定序列相互作用在重复域中促进局部β转形成.
- 这些稳定的结构元素可能会影响tau的整体构造格局及其向病态聚合物的过渡.
- 了解这些内在的形状偏好是解读陶氏病变的关键.
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