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| タイトル | Role of surfactants in electron cryo-microscopy film preparation. |
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| ジャーナル・号・ページ | Biophys J, Vol. 122, Issue 10, Page 1846-1857, Year 2023 |
| 掲載日 | 2023年5月16日 |
著者 | Baptiste Michon / Uriel López-Sánchez / Jéril Degrouard / Hugues Nury / Amélie Leforestier / Emmanuelle Rio / Anniina Salonen / Manuela Zoonens / ![]() |
| PubMed 要旨 | Single-particle electron cryo-microscopy (cryo-EM) has become an effective and straightforward approach to determine the structure of membrane proteins. However, obtaining cryo-EM grids of sufficient ...Single-particle electron cryo-microscopy (cryo-EM) has become an effective and straightforward approach to determine the structure of membrane proteins. However, obtaining cryo-EM grids of sufficient quality for high-resolution structural analysis remains a major bottleneck. One of the difficulties arises from the presence of detergents, which often leads to a lack of control of the ice thickness. Amphipathic polymers such as amphipols (APols) are detergent substitutes, which have proven to be valuable tools for cryo-EM studies. In this work, we investigate the physico-chemical behavior of APol- and detergent-containing solutions and show a correlation with the properties of vitreous thin films in cryo-EM grids. This study provides new insight on the potential of APols, allowing a better control of ice thickness while limiting protein adsorption at the air-water interface, as shown with the full-length mouse serotonin 5-HT receptor whose structure has been solved in APol. These findings may speed up the process of grid optimization to obtain high-resolution structures of membrane proteins. |
リンク | Biophys J / PubMed:37077048 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.4 Å |
| 構造データ | ![]() EMDB-15471: Mouse serotonin 5-HT3A receptor in amphipols A8-35 |
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