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In Vitro Ubiquitination and Deubiquitination Assays of Nucleosomal Histones
Published on: July 25, 2019
WASH依存のアクチンポリメリゼーションとタンパク質密輸の規制は,ユビキチネーションによるものです
Yi-Heng Hao1, Jennifer M Doyle, Saumya Ramanathan
1Department of Physiology, UT Southwestern Dallas, TX 75390, USA.
Cell
|March 5, 2013
まとめ
ユビキチネーションは,エンドソーマのタンパク質輸送を調節する. MAGE-L2-TRIM27リガゼはWASHを標的とし,アクチン核化を活性化し,レトロマー媒介による輸送を可能にします.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- エンドソーマのタンパク質の密輸は,細胞機能にとって極めて重要であり,病気に関与しています.
- 病原体は,自分の利益のために,エンドソーマル経路をハイジャックすることが多い.
- レトロマー複合体とWASH調節複合体は,エンドソーマ輸送の重要な役割を果たしています.
研究 の 目的:
- 内体タンパク質の密輸におけるユビキチネーションの役割を明らかにする.
- レトロマー媒介による輸送に関与する特定のウビキチンリガスを特定する.
- ウビキチネーションとエンドソームのアクチン核化を結びつける分子メカニズムを理解する.
主な方法:
- 共同免疫プレシピテーションと顕微鏡を用いてMAGE-L2-TRIM27の局所化を調査しました.
- リトロマー輸送に対するMAGE-L2-TRIM27とUbe2Oの影響を評価するためにsiRNAノックダウンを使用しました.
- MAGE-L2-TRIM27がWASHのユビキチン化とF-アクチンの核化に及ぼす効果を調べました.
- WASHのユビキチネーションを阻害した結果,エンドソーマ輸送に及ぼす影響を分析した.
主要な成果:
- MAGE-L2-TRIM27は,レトロマー複合体との相互作用により,エンドソームに局所化する.
- MAGE-L2-TRIM27またはUbe2Oのノックダウンは,レトロマー媒介による輸送を阻害する.
- MAGE-L2-TRIM27のユビキチン・リガース活性性は,WASH媒介によるF-アクチンの核形成に不可欠である.
- MAGE-L2-TRIM27は,F-アクチンの核化と輸送に不可欠なK220のWASHのK63結合ユビキチネーションを媒介する.
結論:
- MAGE-L2-TRIM27は,逆行性エンドソーマ輸送において重要な役割を果たしています.
- MAGE-L2-TRIM27によるWASHのK63関連ユビキチン化は,エンドソーマルアクチン核形成の重要な規制ステップである.
- この研究は,WASH規制複合体の新しい活性化信号を特定しています.
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