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-Structure paper
タイトル | Structure of the hyperosmolality-gated calcium-permeable channel OSCA1.2. |
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ジャーナル・号・ページ | Nat Commun, Vol. 9, Issue 1, Page 5060, Year 2018 |
掲載日 | 2018年11月29日 |
著者 | Xin Liu / Jiawei Wang / Linfeng Sun / |
PubMed 要旨 | In plants, hyperosmolality stimuli triggers opening of the osmosensitive channels, leading to a rapid downstream signaling cascade initiated by cytosolic calcium concentration elevation. Members of ...In plants, hyperosmolality stimuli triggers opening of the osmosensitive channels, leading to a rapid downstream signaling cascade initiated by cytosolic calcium concentration elevation. Members of the OSCA family in Arabidopsis thaliana, identified as the hyperosmolality-gated calcium-permeable channels, have been suggested to play a key role during the initial phase of hyperosmotic stress response. Here, we report the atomic structure of Arabidopsis OSCA1.2 determined by single-particle cryo-electron microscopy. It contains 11 transmembrane helices and forms a homodimer. It is in an inactivated state, and the pore-lining residues are clearly identified. Its cytosolic domain contains a RNA recognition motif and two unique long helices. The linker between these two helices forms an anchor in the lipid bilayer and may be essential to osmosensing. The structure of AtOSCA1.2 serves as a platform for the study of the mechanism underlying osmotic stress responses and mechanosensing. |
リンク | Nat Commun / PubMed:30498218 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.68 - 5.4 Å |
構造データ | EMDB-9677: |
由来 |
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キーワード | MEMBRANE PROTEIN / Channel |