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相关概念视频

Amyloid Fibrils03:03

Amyloid Fibrils

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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,...
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相关实验视频

Updated: Jul 5, 2025

Generation of Alpha-Synuclein Preformed Fibrils from Monomers and Use In Vivo
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Generation of Alpha-Synuclein Preformed Fibrils from Monomers and Use In Vivo

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在溶液中的氨二元化可以使用模型系统来研究.

Charlotte Nybro Dansholm1, Sebastian Meier1, Sophie R Beeren1

  • 1Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, Kongens Lyngby, DK-2800, Denmark.

Chembiochem : a European journal of chemical biology
|January 14, 2024
PubMed
概括
此摘要是机器生成的。

短的粉素链在溶液中二元化,形成通过NMR光谱检测到的双螺旋. 这种二分化是以恒驱动的,并且随着链条长度的增加而稳定,影响粉结构和材料发展.

关键词:
核磁共振光谱法 (NMR) 是一种光谱法.粉糖是什么 粉糖是什么碳水化合物 碳水化合物飞机直升机的飞行器超分子化学 超分子化学

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科学领域:

  • 碳水化合物化学 碳水化合物化学
  • 生物物理化学 生物物理化学
  • 聚合物科学 聚合物科学

背景情况:

  • 已知氨,是一种线性α-1,4-链接的葡萄糖聚合物,以平行双螺旋的形式结晶.
  • 从历史上来看,关于溶液中氨二重体形成的直接证据是难以捉摸的.

研究的目的:

  • 在溶液中检测和描述短粉素链的二分化.
  • 为了进行第一个系统的热力学研究溶液中的粉素协会.

主要方法:

  • 合成α-1,4葡萄糖 (6-22个葡萄糖单位) 在减少端标记为4-aminobenzamide.
  • 利用NMR光谱学,根据不同的化学转移来区分单链氨和双链氨.
  • 执行二元化过程的热力学分析.

主要成果:

  • 通过使用NMR光谱学成功检测和量化溶液中的粉素二分化.
  • 模态化过程是以力驱动的,而以力不利的.
  • 氨二重复稳定性增加0.85kJ/mol的每一个额外的葡萄糖残留对超出链长12.

结论:

  • 提供了溶液中氨酸协会的基本热力学数据.
  • 能够对粉结构,凝和酶性消化进行定量理解.
  • 为在自组装材料开发中使用α-1,4-葡萄糖奠定了基础.