+検索条件
-Structure paper
| タイトル | Off-axis rotor in Enterococcus hirae V-ATPase visualized by Zernike phase plate single-particle cryo-electron microscopy. |
|---|---|
| ジャーナル・号・ページ | Sci Rep, Vol. 8, Issue 1, Page 15632, Year 2018 |
| 掲載日 | 2018年10月23日 |
著者 | Jun Tsunoda / Chihong Song / Fabiana Lica Imai / Junichi Takagi / Hiroshi Ueno / Takeshi Murata / Ryota Iino / Kazuyoshi Murata / ![]() |
| PubMed 要旨 | EhV-ATPase is an ATP-driven Na pump in the eubacteria Enterococcus hirae (Eh). Here, we present the first entire structure of detergent-solubilized EhV-ATPase by single-particle cryo-electron ...EhV-ATPase is an ATP-driven Na pump in the eubacteria Enterococcus hirae (Eh). Here, we present the first entire structure of detergent-solubilized EhV-ATPase by single-particle cryo-electron microscopy (cryo-EM) using Zernike phase plate. The cryo-EM map dominantly showed one of three catalytic conformations in this rotary enzyme. To further stabilize the originally heterogeneous structure caused by the ATP hydrolysis states of the V-ATPases, a peptide epitope tag system was adopted, in which the inserted peptide epitope sequence interfered with rotation of the central rotor by binding the Fab. As a result, the map unexpectedly showed another catalytic conformation of EhV-ATPase. Interestingly, these two conformations identified with and without Fab conversely coincided with those of the minor state 2 and the major state 1 of Thermus thermophilus V/A-ATPase, respectively. The most prominent feature in EhV-ATPase was the off-axis rotor, where the cytoplasmic V domain was connected to the transmembrane V domain through the off-axis central rotor. Furthermore, compared to the structure of ATP synthases, the larger size of the interface between the transmembrane a-subunit and c-ring of EhV-ATPase would be more advantageous for active ion pumping. |
リンク | Sci Rep / PubMed:30353110 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 17.0 - 19.0 Å |
| 構造データ | ![]() EMDB-6977: ![]() EMDB-6978: ![]() EMDB-9661: ![]() EMDB-9662: |
| 由来 |
|
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク



Enterococcus hirae (バクテリア)