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相关概念视频

Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
Mechanical Protein Functions01:58

Mechanical Protein Functions

Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 

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相关实验视频

Updated: Jul 1, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
09:51

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

通过单分子电子转移探测的蛋白质结构动力学.

Haw Yang1, Guobin Luo, Pallop Karnchanaphanurach

  • 1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.

Science (New York, N.Y.)
|October 11, 2003
PubMed
概括

研究人员使用单个蛋白质分子中的电子转移来观察安格斯特罗姆尺度结构变化. 这揭示了与催化反应相关的蛋白质结构波动.

科学领域:

  • 生物物理学的生物物理.
  • 蛋白质动力学 蛋白质动力学
  • 电子转移是指电子的转移.

背景情况:

  • 电子转移作为一个敏感的探测器,用于单个蛋白质分子的安格斯特罗姆尺度结构动力学.
  • 弗拉还原酶利用可发生光诱导电子转移的弗拉和氨酸残留物.

研究的目的:

  • 用电子转移作为探针来研究单个蛋白质分子的安格斯特罗姆尺度结构变化.
  • 为了将蛋白质构造的波动与催化反应性相关联.

主要方法:

  • 使用单分子光测量弗拉的生命周期.
  • 作为距离探测器,使用了flavin和tyrosine之间的光诱导电子转移.
  • 对观察到的距离变化进行了相关性分析.

主要成果:

  • 在单个分子水平上,随着时间的推移观察到flavin-tyrosine距离的变化.
  • 确定了flavin和tyrosine之间的平均力潜力.
  • 透露了跨多个时间尺度 (微秒到秒) 的构造波动.

结论:

  • 单分子电子转移可以解决安格斯特罗姆级蛋白质结构动态.

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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
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Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

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Last Updated: Jul 1, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
07:33

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Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
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  • 蛋白质构造的波动与催化活性的变化有关.
  • 存在多个相互转换的适配体会影响酶的功能.