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-Structure paper
| タイトル | Tetrameric PilZ protein stabilizes stator ring in complex flagellar motor and is required for motility in . |
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| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 122, Issue 1, Page e2412594121, Year 2025 |
| 掲載日 | 2025年1月7日 |
著者 | Yuanyuan Chen / Shoichi Tachiyama / Yuqian Li / Xueyin Feng / Hang Zhao / Yanmin Wu / Yu Guo / María Lara-Tejero / Canfeng Hua / Jun Liu / Beile Gao / ![]() |
| PubMed 要旨 | Rotation of the bacterial flagellum, the first identified biological rotary machine, is driven by its stator units. Knowledge gained about the function of stator units has increasingly led to studies ...Rotation of the bacterial flagellum, the first identified biological rotary machine, is driven by its stator units. Knowledge gained about the function of stator units has increasingly led to studies of rotary complexes in different cellular pathways. Here, we report that a tetrameric PilZ family protein, FlgX, is a structural component underneath the stator units in the flagellar motor of . FlgX forms a stable tetramer that does not bind cyclic di-GMP (c-di-GMP), unlike other canonical PilZ domain-containing proteins. Cryoelectron tomography and subtomogram averaging of flagellar motors in situ provide evidence that FlgX interacts with each stator unit and plays a critical role in stator ring assembly and stability. Furthermore, FlgX is conserved and was most likely present in the common ancestor of the phylum . Overall, FlgX represents a divergence in function for PilZ superfamily proteins as well as a player in the key stator-rotor interaction of complex flagellar motors. |
リンク | Proc Natl Acad Sci U S A / PubMed:39793078 / PubMed Central |
| 手法 | EM (サブトモグラム平均) |
| 解像度 | 29.2 - 31.3 Å |
| 構造データ | ![]() EMDB-45507: In situ structure of C. jejuni flagellar motor ![]() EMDB-45508: In situ structure of Campylobacter jejuni flagellar motor from flgX deletion mutant ![]() EMDB-45509: In situ structure of C. jejuni flagellar motor from motA deletion mutant |
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