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相关概念视频

Protein Folding01:22

Protein Folding

Overview
Protein Folding01:25

Protein 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 Folding01:22

Protein Folding

Overview
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
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 7, 2026

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
08:34

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

在分子模拟力下的蛋白质折叠动力学.

Robert B Best1, Gerhard Hummer

  • 1Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, USA.

Journal of the American Chemical Society
|March 1, 2008
PubMed
概括

在拉伸力下蛋白质重新折叠是缓慢的,因为展开的状态主导着动力学. 模拟揭示了力量如何影响蛋白质折叠障碍,这表明在更高的力量下进行实验性重新折叠的可能性.

科学领域:

  • 生物物理学的生物物理.
  • 计算生物学 计算生物学
  • 蛋白质动力学 蛋白质动力学

背景情况:

  • 蛋白质的机械展开被广泛研究.
  • 在拉伸力下蛋白质重新折叠仍然具有挑战性.
  • 了解强力诱导的折叠对于蛋白质工程至关重要.

研究的目的:

  • 在施加力下研究蛋白质重新折叠动力学.
  • 模拟机械力对蛋白质折叠路径的影响.
  • 为了确定控制紧张下重新折叠的关键因素.

主要方法:

  • 一个粗粒度的无处不在的模型的模拟.
  • 在不同拉力下重新折叠动力学的分析.
  • 一维克莱默斯理论用于障碍分析的应用.

主要成果:

  • 折叠动力学上的力效应是由克拉默斯理论描述的.
  • 获得了折叠激活屏障的物理意义上的参数.
  • 展开的蛋白质状态显著影响重新折叠的动力学.

结论:

  • 由于未折叠状态,在适度的拉力下,重新折叠速度会大大减慢.

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Microfluidic Mixers for Studying Protein Folding
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Microfluidic Mixers for Studying Protein Folding

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Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy
10:09

Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy

Published on: April 28, 2011

相关实验视频

Last Updated: Jul 7, 2026

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
08:34

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

Microfluidic Mixers for Studying Protein Folding
12:42

Microfluidic Mixers for Studying Protein Folding

Published on: April 10, 2012

Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy
10:09

Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy

Published on: April 28, 2011

  • 模拟参数为实验重折叠观察提供了洞察力.
  • 更高的力可能使蛋白质重新折叠的实际观察成为可能.