ネクロシス抑制エフェクタールタンパク質 ChEC88は,種を網羅するヘミバイオトロフ植物病原体の中で保存されている新しい構造モチーフを採用する.
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PubMedで要約を見る
まとめ
この要約は機械生成です。植物病原菌はChEC88のような 保存されたエフェクタータンパク質を使って 植物免疫を抑制します これらのタンパク質は様々な真菌種で発見され 構造と機能が似ていて ホストの免疫回避の 共通の戦略を明らかにしています
科学分野
- 植物病理学
- 菌類学
- 分子生物学
背景
- 植物病原菌は 植物の防御を克服するために エフェクタータンパク質を使用しますが その多様性は その役割の理解を複雑にします
- 保存されたエフェクターは,植物とキノコの分子相互作用を解読するのに不可欠です.
研究 の 目的
- Colletotrichum higginsianum* のエフェクタータンパク質ChEC88の機能と保存を調査する.
- 他の植物病原菌における ChEC88 とその同類の構造的・機能的関係を解明する.
主な方法
- ChEC88の構造分析のための核磁気共鳴 (NMR) スペクトロスコーピー.
- 関連するタンパク質の構造を予測するホモロジーモデルです.
- PSI-BLASTは,保存された同類体を識別する.
- NLP1によって誘発される植物細胞死を抑制するChEC88および同類体の能力を評価する機能的試験.
- サイト・ディレクテッド・ミュータジェネシス 重要な機能的残留物を特定する.
主要な成果
- ChEC88は新しい擬似二重対称3D構造を示しています.
- ChEC88とその同類種は,Pyricularia oryzae*のBAS3を含むが,ネクロス誘発性ペプチド1型タンパク質 (NLP1) によって誘発された植物細胞死を効果的に抑制する.
- ChEC88のホモログは, *Colletotrichum*, *P. oryzae*,および *Fusarium* 種のヘミバイオトロフ菌に保存されている.
- ChEC88の免疫抑制機能に不可欠な特定の残留物が特定されました.
結論
- ヘミバイオトロフィック植物病原菌は,ChEC88のようなタンパク質を含む保存された免疫抑制メカニズムを使用します.
- これらのエフェクターは共通の祖先の系統から進化した可能性があり,宿主操作のための共通の進化戦略を示しています.
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