プリオン型RNA結合タンパク質の相分離の原動力を支配する分子文法
Jie Wang1, Jeong-Mo Choi2, Alex S Holehouse2
1Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany.
Cell
|July 3, 2018
まとめ
研究者はFUSタンパク質の 分子文法を特定し その分相分離を制御しています 特定のアミノ酸配列がコンデンサ特性を決定し,タンパク質配列から相分離の行動を予測することができる.
科学分野:
- 生物化学
- 分子生物学
- 細胞生物学
背景:
- FUSのようなタンパク質は相分離を経て 液体のような凝縮物を作って 固体のような状態に移行します
- これらの相分離特性を駆動する分子機構は完全に理解されていません.
研究 の 目的:
- FUSタンパク質ファミリーの相分離を制御する配列にコードされた分子文法を識別する.
- 特定のアミノ酸残留物が凝縮物の性質と動態にどのように影響するかを調査する.
主な方法:
- FUSファミリータンパク質の 広範な突然変異
- 細胞内での実験で,相分離の文法がテストされる.
- 段階分離のための予測モデルの開発.
主要な成果:
- 段階分離は,チロシンとアルギニンの残基間の多価相互作用によって引き起こされる.
- 負の電荷の残留物はこれらの相互作用を調節する.
- グリシン残留は流動性を高め,グルタミンとセリン残留は硬化を促進します.
- 飽和濃度はアルギニンとチロシン残基の積に逆比例する.
結論:
- アミノ酸配列にコードされた分子文法は,FUSタンパク質の相分離特性を決定する.
- タンパク質配列の特徴に基づいて,相分離の振る舞いを予測することができる.
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