- EMDB-62892: Human KCNQ2-CaM in complex with QO-58 -
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基本情報
登録情報
データベース: EMDB / ID: EMD-62892
タイトル
Human KCNQ2-CaM in complex with QO-58
マップデータ
試料
複合体: Human KCNQ2-CaM in complex with QO-58
タンパク質・ペプチド: Potassium voltage-gated channel subfamily KQT member 2
リガンド: QO-58
キーワード
KCNQ2 / membrane protein
機能・相同性
機能・相同性情報
axon initial segment / Voltage gated Potassium channels / node of Ranvier / Interaction between L1 and Ankyrins / voltage-gated monoatomic cation channel activity / ankyrin binding / action potential / voltage-gated potassium channel activity / voltage-gated potassium channel complex / potassium ion transmembrane transport ...axon initial segment / Voltage gated Potassium channels / node of Ranvier / Interaction between L1 and Ankyrins / voltage-gated monoatomic cation channel activity / ankyrin binding / action potential / voltage-gated potassium channel activity / voltage-gated potassium channel complex / potassium ion transmembrane transport / nervous system development / chemical synaptic transmission / calmodulin binding / synapse / membrane / plasma membrane 類似検索 - 分子機能
Potassium channel, voltage dependent, KCNQ2 / Ankyrin-G binding site / Ankyrin-G binding motif of KCNQ2-3 / Unstructured region on Potassium channel subunit alpha KvLQT2 / Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / Ion transport domain / Ion transport protein 類似検索 - ドメイン・相同性
Potassium voltage-gated channel subfamily KQT member 2 類似検索 - 構成要素
National Natural Science Foundation of China (NSFC)
U21A20359
中国
引用
ジャーナル: Cell Rep / 年: 2026 タイトル: Structure basis for the activation of KCNQ2 by endogenous and exogenous ligands. 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 / 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.