Japan Agency for Medical Research and Development (AMED)
JP21wm0525018
日本
Japan Society for the Promotion of Science (JSPS)
21H05142
日本
Japan Science and Technology
JPMJPR1782
日本
Japan Science and Technology
JPMJFR204S
日本
Japan Science and Technology
JPMJCR21P3
日本
Other private
日本
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)
R01MH075957
日本
Other private
日本
引用
ジャーナル: Cell / 年: 2022 タイトル: Structural basis for channel conduction in the pump-like channelrhodopsin ChRmine. 著者: Koichiro E Kishi / Yoon Seok Kim / Masahiro Fukuda / Masatoshi Inoue / Tsukasa Kusakizako / Peter Y Wang / Charu Ramakrishnan / Eamon F X Byrne / Elina Thadhani / Joseph M Paggi / Toshiki E ...著者: Koichiro E Kishi / Yoon Seok Kim / Masahiro Fukuda / Masatoshi Inoue / Tsukasa Kusakizako / Peter Y Wang / Charu Ramakrishnan / Eamon F X Byrne / Elina Thadhani / Joseph M Paggi / Toshiki E Matsui / Keitaro Yamashita / Takashi Nagata / Masae Konno / Sean Quirin / Maisie Lo / Tyler Benster / Tomoko Uemura / Kehong Liu / Mikihiro Shibata / Norimichi Nomura / So Iwata / Osamu Nureki / Ron O Dror / Keiichi Inoue / Karl Deisseroth / Hideaki E Kato / 要旨: ChRmine, a recently discovered pump-like cation-conducting channelrhodopsin, exhibits puzzling properties (large photocurrents, red-shifted spectrum, and extreme light sensitivity) that have created ...ChRmine, a recently discovered pump-like cation-conducting channelrhodopsin, exhibits puzzling properties (large photocurrents, red-shifted spectrum, and extreme light sensitivity) that have created new opportunities in optogenetics. ChRmine and its homologs function as ion channels but, by primary sequence, more closely resemble ion pump rhodopsins; mechanisms for passive channel conduction in this family have remained mysterious. Here, we present the 2.0 Å resolution cryo-EM structure of ChRmine, revealing architectural features atypical for channelrhodopsins: trimeric assembly, a short transmembrane-helix 3, a twisting extracellular-loop 1, large vestibules within the monomer, and an opening at the trimer interface. We applied this structure to design three proteins (rsChRmine and hsChRmine, conferring further red-shifted and high-speed properties, respectively, and frChRmine, combining faster and more red-shifted performance) suitable for fundamental neuroscience opportunities. These results illuminate the conduction and gating of pump-like channelrhodopsins and point the way toward further structure-guided creation of channelrhodopsins for applications across biology.
EMPIAR-10926 (タイトル: The pump-like chanelrhodopsin ChRmine / Data size: 850.8 Data #1: Multiframe micrographs for Structural basis for channel conduction in the pump-like channelrhodopsin ChRmine [micrographs - multiframe])
電子線照射量: 51.533 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k)
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解析
ソフトウェア
名称: REFMAC / バージョン: 5.8.0274 / 分類: 精密化 / Contact author: Garib N. Murshudov / Contact author email: garib[at]mrc-lmb.cam.ac.uk / 日付: 2021年12月3日 解説: (un)restrained refinement or idealisation of macromolecular structures
CTF補正
タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION
対称性
点対称性: C3 (3回回転対称)
3次元再構成
解像度: 2.02 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 185895 / 対称性のタイプ: POINT
精密化
解像度: 2→88.659 Å / Cor.coef. Fo:Fc: 0.853 / WRfactor Rwork: 0.268 / SU B: 2.42 / SU ML: 0.062 / Average fsc overall: 0.8813 / Average fsc work: 0.8813 / ESU R: 0.065 / 詳細: Hydrogens have been added in their riding positions /