National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM085234
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
RO1NS053494
米国
National Basic Research Program of China
2014CB910301
中国
National Natural Science Foundation of China
31370821
中国
Top Talents of Program of Yunnan Province
2011HA012
中国
High-level Overseas Talents of Yunnan Province
中国
China Youth 1000-talent Program of the State Council of China
中国
Beijing Advanced Innovation Center for Structural Biology
中国
Tsinghua-Peking Joint Center for Life Sciences
中国
National Natural Science Foundation of China
31570730
中国
Key Research Program of the Chinese Academy of Sciences
KJZD-EW-L03
中国
National Natural Science Foundation of China
81302865
中国
West Light Foundation of the Chinese Academy of Sciences
中国
Yunnan Applied Basic Research Projects
2013FB074
中国
Youth Innovation Promotion Association of the Chinese Academy of Sciences
中国
引用
ジャーナル: Nature / 年: 2017 タイトル: Structure of a eukaryotic cyclic-nucleotide-gated channel. 著者: Minghui Li / Xiaoyuan Zhou / Shu Wang / Ioannis Michailidis / Ye Gong / Deyuan Su / Huan Li / Xueming Li / Jian Yang / 要旨: Cyclic-nucleotide-gated channels are essential for vision and olfaction. They belong to the voltage-gated ion channel superfamily but their activities are controlled by intracellular cyclic ...Cyclic-nucleotide-gated channels are essential for vision and olfaction. They belong to the voltage-gated ion channel superfamily but their activities are controlled by intracellular cyclic nucleotides instead of transmembrane voltage. Here we report a 3.5-Å-resolution single-particle electron cryo-microscopy structure of a cyclic-nucleotide-gated channel from Caenorhabditis elegans in the cyclic guanosine monophosphate (cGMP)-bound open state. The channel has an unusual voltage-sensor-like domain, accounting for its deficient voltage dependence. A carboxy-terminal linker connecting S6 and the cyclic-nucleotide-binding domain interacts directly with both the voltage-sensor-like domain and the pore domain, forming a gating ring that couples conformational changes triggered by cyclic nucleotide binding to the gate. The selectivity filter is lined by the carboxylate side chains of a functionally important glutamate and three rings of backbone carbonyls. This structure provides a new framework for understanding mechanisms of ion permeation, gating and channelopathy of cyclic-nucleotide-gated channels and cyclic nucleotide modulation of related channels.
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 281.15 K / 装置: FEI VITROBOT MARK IV 詳細: Blotted for 4.0 seconds (double-sided, blot force 1), after waiting for 3.0 seconds the grid was immediately plunged into liquid ethane cooled by liquid-nitrogen..