競合するタンパク質-RNA相互作用ネットワーク 制御 多相細胞内組織
David W Sanders1, Nancy Kedersha2, Daniel S W Lee1
1Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA.
Cell
|April 18, 2020
まとめ
液相分離 (LLPS) は細胞凝縮物を形成する. 競合するタンパク質ネットワークはRNA結合ではなく コンデンサートの組成と共存を制御し 細胞組織を理解するための新しい枠組みを提供します
科学分野:
- バイオ物理学
- 細胞生物学
- 分子生物学
背景:
- 液体液相分離 (LLPS) によって形成される膜のない凝縮物.
- 凝縮液の組立,基礎構造,共存に関する生体物理的規則は完全に理解されていません.
- 細胞プラズマのストレス粒 (SGs) とP体は,そのような凝縮物の重要な例です.
研究 の 目的:
- 細胞凝縮物における多相組織の生体物理的メカニズムを解明する.
- SGとP体の組成と混合性を制御する要因を調査する.
- 調節可能なコンデンサート形成を理解するための一般的な枠組みを開発する.
主な方法:
- ヒト細胞におけるSGとP体の定量分解
- タンパク質相互作用ネットワークとRNA結合ドメイン (RBD) の分析
- パッチコロイド理論の原理の適用
主要な成果:
- 結合ノードのためのタンパク質ネットワークの競争は,RNA結合特異性または無秩序なセグメントではなく,SGとPボディの組成と混合性を決定する.
- 結合していないタンパク質の競争的結合は,LLPSを防ぐ.
- 競合するネットワークに基づいたフレームワークは,調節可能なコンデンサートの形成を説明します.
結論:
- 多相コンデンサートの組織は,タンパク質ネットワーク間のステキオメトリー依存の競争によって支配される.
- このコンテストは,構成的に特定のコンデンサットを生成するための調整可能なメカニズムを提供します.
- 提案された枠組みは,細胞分割の基礎となる原理の洞察を提供します.
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