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-Structure paper
タイトル | Complete structure of the bacterial flagellar hook reveals extensive set of stabilizing interactions. |
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ジャーナル・号・ページ | Nat Commun, Vol. 7, Page 13425, Year 2016 |
掲載日 | 2016年11月4日 |
著者 | Hideyuki Matsunami / Clive S Barker / Young-Ho Yoon / Matthias Wolf / Fadel A Samatey / |
PubMed 要旨 | The bacterial flagellar hook is a tubular helical structure made by the polymerization of multiple copies of a protein, FlgE. Here we report the structure of the hook from Campylobacter jejuni by ...The bacterial flagellar hook is a tubular helical structure made by the polymerization of multiple copies of a protein, FlgE. Here we report the structure of the hook from Campylobacter jejuni by cryo-electron microscopy at a resolution of 3.5 Å. On the basis of this structure, we show that the hook is stabilized by intricate inter-molecular interactions between FlgE molecules. Extra domains in FlgE, found only in Campylobacter and in related bacteria, bring more stability and robustness to the hook. Functional experiments suggest that Campylobacter requires an unusually strong hook to swim without its flagella being torn off. This structure reveals details of the quaternary organization of the hook that consists of 11 protofilaments. Previous study of the flagellar filament of Campylobacter by electron microscopy showed its quaternary structure made of seven protofilaments. Therefore, this study puts in evidence the difference between the quaternary structures of a bacterial filament and its hook. |
リンク | Nat Commun / PubMed:27811912 / PubMed Central |
手法 | EM (らせん対称) |
解像度 | 3.5 Å |
構造データ | |
由来 |
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キーワード | MOTOR PROTEIN / Campylobacter jejuni / helical assembly of FlgE / flagellar hook |