バイオ分子コンデンサートの核化状況

Shunsuke F Shimobayashi¹, Pierre Ronceray^2,3, David W Sanders¹

¹Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA.

Nature

|September 23, 2021

まとめ

細胞凝縮物は液体-液体相分離によって形成される. この研究では核形成は非生命体と似た物理的原理に従っており生物分子特性が効率と位置を調整しています

科学分野:

細胞生物学
バイオ物理学
生物分子工学

背景:

細胞構造は,生物分子の液体液相分離 (LLPS),特に本質的に乱れた領域 (IDR) を介して形成されます.
クラシックな核化理論 (CNT) は非生物系における相分離をモデル化しているが,複雑な細胞環境におけるその適用性は不明である.

研究の目的:

生物の細胞における凝縮核形成は,無生物のシステムと同様の物理的原理に従っているかどうかを調査する.
生物分子の特徴が細胞凝縮核の有効性や位置に影響するかどうかを判断する.

主な方法:

生体細胞における内生性およびバイオミメティック凝縮物における核化運動の定量的な特徴化.
凝縮物形成を分析するために,古典的な核化理論のような枠組みの適用.

主要な成果:

生体細胞の凝縮核形成は,非生体物質に似た物理的プロセスを経て起こります.
生物分子の特徴,特にIDRは,核化率を高めるための適合種として作用する.
細胞プロセス運動は,凝縮核化率と空間特異性に影響する.

結論:

CNTのような定量的な枠組みで細胞内濃縮核化が説明できる.
核形成部位の有効性は生物分子の特性によって調整されます.
この理解によって合成コンデンサートの空間的・時間的な工学が可能になります

さらに関連する動画

06:48

Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells

Published on: January 5, 2024

4.4K

08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

2.9K

関連する概念動画

02:35

Noncovalent Attractions in Biomolecules

18.8K

02:39

Phase Transitions: Vaporization and Condensation

19.4K

The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...

19.4K

01:09

Colloidal precipitates

1.1K

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

1.1K

01:10

Recrystallization: Solid–Solution Equilibria

1.5K

Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...

1.5K

00:59

Mechanisms of Membrane Domain Formation

3.4K

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...

3.4K

02:35

Energetics of Solution Formation

7.0K

The formation of a solution is an example of a spontaneous process, which is 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. Formation of the solution requires the solute–solute and solvent–solvent...