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-Structure paper
| タイトル | Structure basis for the activation of KCNQ2 by endogenous and exogenous ligands. |
|---|---|
| ジャーナル・号・ページ | Cell Rep, Vol. 45, Issue 1, Page 116771, Year 2025 |
| 掲載日 | 2025年12月23日 |
著者 | Yiwen Zhao / Zhenni Yang / Sai Shi / Han Hao / Xinmeng Li / Demin Ma / Nannan Su / Weixin Zhao / Jicheng Shao / Yating An / Ke Wang / Yinuo Liu / Lu Zou / Jinlong Qi / Hailin Zhang / Jiangtao Guo / Xiaona Du / ![]() |
| PubMed 要旨 | The voltage-gated potassium channel KCNQ2 is crucial for stabilizing neuronal membrane potential, and its mutations can cause various epilepsies. KCNQ2 is activated by endogenous ligand ...The voltage-gated potassium channel KCNQ2 is crucial for stabilizing neuronal membrane potential, and its mutations can cause various epilepsies. KCNQ2 is activated by endogenous ligand phosphatidylinositol-4,5-bisphosphate (PIP) and exogenous ligands, yet the structural mechanisms underlying these activations remain unclear. Here, we report the cryo-electron microscopy structures of human KCNQ2 in complex with exogenous ligands QO-58 and QO-83 in the absence or presence of PIP in either closed or open conformation. While QO-83 binds in the classical fenestration pocket of the pore domain, QO-58 mainly binds at the flank of S4 in the voltage-sensing domain. These structures, along with electrophysiological assays and computational studies, provide mechanistic insights into the ligand activation of KCNQ2 and may guide the development of anti-epileptic drugs targeting KCNQ2. |
リンク | Cell Rep / PubMed:41442279 |
| 手法 | EM (単粒子) |
| 解像度 | 2.9 - 3.8 Å |
| 構造データ | EMDB-38522, PDB-8xo1: EMDB-62892, PDB-9l8w: EMDB-66696, PDB-9xb9: EMDB-66788, PDB-9xed: |
| 化合物 | ![]() PDB-1lwz: ![]() PDB-1lvr: ![]() ChemComp-PIO: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / KCNQ2 / human voltage-gated potassium channel / voltage-gated potassium channel |
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