バクテリアのトレードミリングチューブリンフィラメントに沿ってウイルスカプシドの密輸
Vorrapon Chaikeeratisak1, Kanika Khanna2, Katrina T Nguyen2
1Division of Biological Sciences, University of California, San Diego, San Diego, CA 92093, USA; Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
Cell
|June 15, 2019
まとめ
バクテリアウイルスは動的細胞骨格 (PhuZ) を貨物輸送に使用する. カプシドはPhuZフィラメントに沿ってDNA包装のためのファージ核に移動し,進化した細菌の細胞骨格の能力を示しています.
科学分野:
- 微生物学
- 構造生物学
- 分子生物学
背景:
- ユカリオットウイルスはマイクロチューブルベースの貨物輸送を利用します.
- このようなメカニズムのバクテリアの例は以前報告されていません.
- Pseudomonas の大きなファージは,DNA 組織のためのチューブリンベースの (PhuZ) スピンドルを持っています.
研究 の 目的:
- Pseudomonasファグにおけるカプシド輸送とDNA包装のメカニズムを調査する.
- 細菌のウイルスの複製における PhuZ 細胞骨格の役割を明らかにする.
- バクテリアの細胞骨格の中で cargo-trafficking能力が 進化したことを示します
主な方法:
- 膜のカプシド組立とフーゾーフィラメントに沿った動きの観察.
- ファグ核の回転とカプシド分布の分析
- トレッドミリングとGTPの水解を含むPhuZフィラメントのダイナミクスの調査.
- GTPの水解に欠陥のある変異したフーZフィラメントのカプシドの行動に関する研究.
主要な成果:
- カプシドは膜に組み立てられ,フーゼスフィラメントに沿ってファグ核に急速に輸送されます.
- PhuZスピンドルはファグの核を回転させ,カプシドの分布を促進します.
- PhuZフィラメントのポリメリゼーションはカプシドの動きと核の回転を駆動する.
- カプシドは静的なフーZ変異体で固定されていて,フィラメントダイナミクスの重要性を示している.
結論:
- フェーグカプシドは,極点でのフーZポリメリゼーションを含むメカニズムで運ばれます.
- これはバクテリアの細胞骨格が 運搬機能を進化させたことを示しています
- PhuZベースの輸送は,これらの細菌のDNA包装とウイルスの複製に不可欠です.
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