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-Structure paper
| タイトル | Illuminating the molecular basis of human daylight vision. |
|---|---|
| ジャーナル・号・ページ | Science, Vol. 392, Issue 6805, Page eadz3624, Year 2026 |
| 掲載日 | 2026年6月25日 |
著者 | Sarah L Schmidt / Jakub Dostal / Saumik Sen / Andrej Hovan / Deborah Walter / Martin V Appleby / Asato Kojima / Hideaki E Kato / John H Beale / Miroslav Kloz / Gebhard F X Schertler / Polina Isaikina / ![]() |
| PubMed 要旨 | Photopic vision, including fast motion and color perception in daylight, is mediated by cone opsins, specialized G protein-coupled receptors (GPCRs). Despite sharing the same chromophore, the three ...Photopic vision, including fast motion and color perception in daylight, is mediated by cone opsins, specialized G protein-coupled receptors (GPCRs). Despite sharing the same chromophore, the three receptor subtypes absorb light at different wavelengths of the visible spectrum. The molecular mechanisms governing their spectral properties and exceptionally rapid responses remain largely unknown. We report cryo-electron microscopy structures of the human blue-sensitive (OPN1SW) and green-sensitive (OPN1MW) cone opsins in their dark-adapted states, combined with femtosecond-resolution spectroscopy, functional assays, and advanced simulations. The data reveal distinct chromophore stabilization mechanisms across human visual opsins and specific sequence adaptations in the GPCR microswitch motifs, underlining their structural plasticity and distinct activation mechanisms. These findings delineate the molecular basis of the evolutionary refinements fulfilling the needs of vision in daylight. |
リンク | Science / PubMed:42348698 |
| 手法 | EM (単粒子) |
| 解像度 | 3.06 - 3.9 Å |
| 構造データ | EMDB-52615, PDB-9i3t: ![]() EMDB-52707: Dark-state structure of human medium-wavelength cone opsin (OPN1MW) EMDB-52814, PDB-9ibw: EMDB-53268, PDB-9qp4: |
| 化合物 | ![]() ChemComp-RET: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / Human Cone opsin / GPCR / Retinal binding protein / Vision / Color perception / human daylight vision / OPN1SW / blue cone opsin |
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