極小のマクロモレキュラ系における凝縮相の引きずり戦
Archishman Ghosh1, Xiaojia Zhang1, Huan-Xiang Zhou1,2
1Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States.
Journal of the American Chemical Society
|April 25, 2020
まとめ
研究者は4つのマクロモリキュルを用いて 膜のない臓器細胞をモデル化し ドロップレット形成や進化のような複雑な相行動のルールを明らかにしました この最小限のシステムは,異常な相変異と凝縮物の脱水を理解するのに役立ちます.
科学分野:
- バイオ物理学
- 分子生物学
- 柔らかい物質の物理
背景:
- 膜のない臓器は,液体-液体相分離によって形成される動的細胞区間である.
- その形成と性質は,多数のマクロ分子成分間の複雑な相互作用に依存しています.
- これらの相の行動を支配する 基本的な物理化学的法則を理解することは 極めて重要です
研究 の 目的:
- 4つのマクロ分子からなる最小限のシステムを使用して,膜のない臓器細胞の相行動を調べる.
- 凝縮物形成,進化,相変化を制御する物理化学的原理を明らかにする.
- デミックスやプロパティの変更などの複雑な動作を 再構成して説明する方法を示します
主な方法:
- SH35 (S),PRM5 (P),ヘパリン (H),およびリゾジーム (L) の4つの異なるマクロモレキュールを利用した.
- 二次と四次混合物を分析し,相行動 (ドロップレット,ネットワークの降水) を観察した.
- ThT結合,コンフォカル顕微鏡,光白化後の光回復など,使用した技術.
主要な成果:
- ドロップレット形成 (S:P,S:L,P:H) とネットワークの降水 (H:L) を含む多様な相行動が観察されました.
- 段階の境界を説明する対の引力 (H:L > P:H > S:P > S:L) の順序を確立した.
- 増加するPまたはS+PがH:Lの沈殿物を溶かすことを実証し,沈殿物は時間とともに内部の解離とともに滴状の構造に進化する.
結論:
- 最小の4つのマクロモレキュルのシステムは,複雑な膜のないオルガネルの相行動を再現できます.
- マクロ分子相互作用を制御する物理化学的規則は,相分離と物質特性を決定する.
- このモデルは,細胞の異常な相変異と凝縮動態を理解し,潜在的に制御するための枠組みを提供します.
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