関連する実験動画
Updated: Jul 18, 2026

08:34
Cryogenic Liquid Jets for High Repetition Rate Discovery Science
Published on: May 9, 2020
無料エネルギーの景観の荒れを定量化:エントロピー的なボトルネックとタンパク質の折り畳み率
Leslie L Chavez1, José N Onuchic, Cecilia Clementi
1Center for Theoretical Biological Physics and Department of Physics, University of California at San Diego, La Jolla, California 92093, USA.
Journal of the American Chemical Society
|July 9, 2004
まとめ
この研究では,タンパク質の折り畳み速度とメカニズムを説明するために,トポロジカル・ディスクリプタを導入します. 構成エントロピーの異質性を定量化することは,実験的に観察された折り畳みダイナミクスの単純な理論的基礎を提供します.
科学分野:
- バイオフィジックス 生物物理学
- コンピュータ生物学 コンピュータ生物学
- タンパク質のダイナミクス
背景:
- タンパク質の折り畳み速度とメカニズムは,生体物理学における重要な研究分野である.
- タンパク質の折り畳みの物理化学的原理を理解するには,理論モデルと実験データを比較する必要があります.
- タンパク質フリーエネルギーの景観は,エントロピーとエネルギー要因の相互作用によって形成されます.
研究 の 目的:
- トポロジカル・ディスクリプタを使用して,構成エントロピーの異質性を定量化するための新しい方法を提案する.
- 実験的に観察されたタンパク質の折り畳み速度とメカニズムの理論的説明を提供すること.
- エントロピック景観の特徴と折り畳みダイナミクスとの関係を調査する.
主な方法:
- 自由エネルギーへの構成エントロピーの貢献を分析するために,トポロジック記述子の適用.
- 16個の2状態の折りたたみタンパク質を含むデータセットの分析.
- 理論的発見と折り畳み速度やメカニズムの実験的測定の相関.
主要な成果:
- トポロジカル・ディスクリプタは,構成エントロピーの異質性を効果的に定量化します.
- 提案された方法は,タンパク質の折り畳み率について明確な理論的説明を提供します.
- 自由エネルギーの景観における折り畳みの経路に沿ったエントロピック粗さは,折り畳みのメカニズムと関連しています.
結論:
- トポロジカル・ディスクリプタは,タンパク質の折り畳みを理解するための強力なツールです.
- この研究は,タンパク質の折り畳み動態を予測するための理論的枠組みを前進させる.
- このアプローチは,タンパク質の折りたたみに関する理論的予測と実験的観測の間のギャップを埋めます.
関連する概念動画
Quantifying Heat
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...
Gibbs Free Energy
One of the challenges of using the second law of thermodynamics to determine if a process is spontaneous is that it requires measurements of the entropy change for the system and the entropy change for the surroundings. An alternative approach involving a new thermodynamic property defined in terms of system properties only was introduced in the late nineteenth century by American mathematician Josiah Willard Gibbs. This new property is called the Gibbs free energy (G) (or simply the free...
Mechanism of heat transfer
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
Heat Capacities of an Ideal Gas II
For a system that undergoes a thermodynamic process at a constant volume condition, the heat absorbed is used only to increase the system's internal energy and not for doing any kind of work. While for a system undergoing a thermodynamic process under a constant pressure condition, the amount of heat absorbed is used not only for increasing the internal energy (as a function of temperature) but also for doing some work. The molar heat capacity is the amount of heat required to increase the...
Heat Capacities of an Ideal Gas III
The number of independent ways a gas molecule can move along straight line, rotate, and vibrate is called its degrees of freedom. Supposing d represents the number of degrees of freedom of an ideal gas, the molar heat capacity at constant volume of an ideal gas in terms of d is
Energy Conservation and Bernoulli's Equation
Applying the conservation of energy principle or the work-energy theorem to an incompressible, inviscid fluid in laminar, steady, irrotational flow leads to Bernoulli's equation. It states that the sum of the fluid pressure, potential, and kinetic energy per unit volume is constant along a streamline.
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...

