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-Structure paper
| タイトル | Structures of the sheathed flagellum reveal mechanisms of assembly and rotation in Vibrio cholerae. |
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| ジャーナル・号・ページ | Nat Microbiol, Vol. 10, Issue 12, Page 3305-3314, Year 2025 |
| 掲載日 | 2025年10月31日 |
著者 | Wangbiao Guo / Sarah Zhang / Jin Hwan Park / Venus Stanton / Merrill Asp / Helen Herrera / Jung-Shen Benny Tai / Jian Yue / Jiaqi Wang / Jiaqi Guo / Rajeev Kumar / Jack M Botting / Shenping Wu / Jing Yan / Karl E Klose / Fitnat H Yildiz / Jun Liu / ![]() |
| PubMed 要旨 | Motility promotes the complex life cycle and infectious capabilities of Vibrio cholerae and is driven by rotation of a single polar flagellum. The flagellar filament comprises four flagellin proteins ...Motility promotes the complex life cycle and infectious capabilities of Vibrio cholerae and is driven by rotation of a single polar flagellum. The flagellar filament comprises four flagellin proteins (FlaA-D) and is covered by a membranous sheath continuous with the outer membrane. Here we combine in situ cryo-electron microscopy single-particle analysis, fluorescence microscopy and molecular genetics to determine 2.92-3.43 Å structures of the sheathed flagellar filament from intact bacteria. Our data reveal the spatial arrangement of FlaA-D, showing that FlaA localizes at the cell pole and functions as a template for filament assembly involving multiple flagellins. Unlike unsheathed flagellar filaments, the sheathed filament from V. cholerae possesses a highly conserved core but a smooth, hydrophilic surface adjacent to the membranous sheath. A tiny conformational change at the single flagellin level results in a supercoiled filament and curved membranous sheath, supporting a model wherein the filament rotates separately from the sheath, enabling the distinct motility of V. cholerae. |
リンク | Nat Microbiol / PubMed:41174224 |
| 手法 | EM (単粒子) / EM (らせん対称) |
| 解像度 | 2.45 - 3.43 Å |
| 構造データ | EMDB-49125, PDB-9n8a: EMDB-49126, PDB-9n8b: EMDB-49128, PDB-9n8g: EMDB-49129, PDB-9n8h: EMDB-49131, PDB-9n8m: EMDB-71351, PDB-9p7r: |
| 由来 |
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キーワード | MOTOR PROTEIN / In situ cryo-EM / sheathed flagellar filament / FlaD Vibrio cholerae. / unsheathed flagellar filament / FlaC / Vibrio cholerae. / FlaB Vibrio cholerae. |
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vibrio cholerae o1 biovar el tor str. n16961 (コレラ菌)
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