+検索条件
-Structure paper
| タイトル | Structure of the Deactive State of Mammalian Respiratory Complex I. |
|---|---|
| ジャーナル・号・ページ | Structure, Vol. 26, Issue 2, Page 312-319.e3, Year 2018 |
| 掲載日 | 2018年2月6日 |
著者 | James N Blaza / Kutti R Vinothkumar / Judy Hirst / ![]() |
| PubMed 要旨 | Complex I (NADH:ubiquinone oxidoreductase) is central to energy metabolism in mammalian mitochondria. It couples NADH oxidation by ubiquinone to proton transport across the energy-conserving inner ...Complex I (NADH:ubiquinone oxidoreductase) is central to energy metabolism in mammalian mitochondria. It couples NADH oxidation by ubiquinone to proton transport across the energy-conserving inner membrane, catalyzing respiration and driving ATP synthesis. In the absence of substrates, active complex I gradually enters a pronounced resting or deactive state. The active-deactive transition occurs during ischemia and is crucial for controlling how respiration recovers upon reperfusion. Here, we set a highly active preparation of Bos taurus complex I into the biochemically defined deactive state, and used single-particle electron cryomicroscopy to determine its structure to 4.1 Å resolution. We show that the deactive state arises when critical structural elements that form the ubiquinone-binding site become disordered, and we propose reactivation is induced when substrate binding to the NADH-reduced enzyme templates their reordering. Our structure both rationalizes biochemical data on the deactive state and offers new insights into its physiological and cellular roles. |
リンク | Structure / PubMed:29395787 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 4.13 - 7.5 Å |
| 構造データ | ![]() EMDB-3733: |
| 化合物 | ![]() ChemComp-SF4: ![]() ChemComp-FES: ![]() ChemComp-FMN: ![]() ChemComp-NAP: ![]() ChemComp-ZN: |
| 由来 |
|
キーワード | OXIDOREDUCTASE / Complex I / redox enzyme / proton pump / membrane protein |
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








キーワード