プロテイン・ドロップルの機械生物学:乱れから生じる力
Timothy J Welsh1, Yi Shen1, Aviad Levin1
1Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
Cell
|December 1, 2018
まとめ
細胞内タンパク質凝縮体は,光遺伝学を用いて,機械的な力によってクロマチンを再編成することが判明した. これは,細胞機械生物学における液体-液体相分離の新たな役割を強調しています.
科学分野:
- 細胞生物学
- 分子生物学
- バイオ物理学
背景:
- 細胞内タンパク質コンデンサートは,液体液相分離 (LLPS) によって形成されるダイナミックな構造である.
- 機能はますます認識されていますが 機械的な役割は理解されていないままです
研究 の 目的:
- 細胞内タンパク質凝縮物の機械的性質と細胞機能を調査する.
- 細胞メカノバイオロジーのLLPSの役割を調査する
主な方法:
- タンパク質の凝縮物を操作し,研究するために光合成技術が採用されました.
- 顕微鏡検査と生体物理学的測定法を使用して,凝縮物の行動と機械的力生成を評価した.
主要な成果:
- 成長するタンパク質凝縮物は 重要な機械的力を発揮することが観察された.
- これらの力は細胞核内のクロマチンの再配置を誘導することが示された.
- この研究は,LLPSによるコンデンサートダイナミクスとクロマチンの機械的調節の間の直接的なリンクを確立しています.
結論:
- 細胞内タンパク質凝縮体は細胞力学に積極的に参加する.
- LLPSは力生成とクロマチンの改造を可能にすることで,メカノバイオロジーにおいて重要な役割を果たします.
関連する概念動画
Intrinsically Disordered Proteins
19.4K
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
19.4K
Intrinsically Disordered Proteins
2.8K
2.8K
Intermolecular Forces
71.0K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
71.0K
Electromotive Force
30.2K
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one substance to...
30.2K
Intermolecular vs Intramolecular Forces
97.0K
Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
97.0K
Intermolecular Forces in Solutions
39.5K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
39.5K


