病原体タンパク質のモジュール性は,宿主リン酸塩の複雑な模倣を可能にします
Hui Li1, Jinlong Wang2, Tung Ariel Kuan3
1The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK.
Cell
|June 27, 2023
まとめ
病原体エフェクターは保存された (L) WY-LWYモジュールを用いて宿主タンパク質フォスファターゼ2A (PP2A) をハイジャックする. このモジュラリティにより,多様なエフェクターが異なる宿主プロセスを標的とし,病原体の分子模倣戦略を明らかにできます.
科学分野:
- 植物病理学
- 分子生物学
- 構造生物学
背景:
- 病原体は宿主細胞を操作するためにエフェクタータンパク質を使用しますが,エフェクター機能の多様性の生成は不明です.
- 植物病原体であるPhytophthoraは,保存された (L) WYモチーフを含むエフェクタを使用し,シーケンス変異性を示す.
研究 の 目的:
- Phytophthora効果器における (L) WYモチーフの機能的重要性を調査する.
- 病原体のレパートリー内で効果因子機能の多様性がどのように生じるかを理解する.
- エフェクタが宿主タンパク質と相互作用するメカニズムを解明する.
主な方法:
- 複数のPhytophthoraエフェクターにおける特定の (L) WY-LWY機能モジュールの識別
- セリン/スレオニンタンパク質フォスファタゼ2A (PP2A) 核酵素の徴集を証明する生化学的測定
- エフェクター-PP2A複合体の結晶構造の決定
主要な成果:
- 特定の (L) WY-LWY組み合わせは,プラントホストにおける効率的なPP2A採用のための機能的モジュールとして機能します.
- 構造分析により, (L) WY-LWYモジュールは宿主PP2Aコア酵素を誘拐して機能的なホロ酵素を形成することを容易にする.
- 共有されたN端のPP2A相互作用モジュールを持つエフェクターは,異なるフォスフォタンパク質を調節するC端のLWYユニットを示します.
結論:
- 病原体は分子模倣によってPP2Aのような主体の重要なリン酸塩を吸収する.
- (L) WY-LWYモジュールで示されるタンパク質のモジュラリティは,病原体エフェクターレパートリーの機能的多様化を推進する.
- エフェクターと宿主との相互作用を理解することで,病原体の毒性戦略の洞察が得られます.
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