Voltage gated Potassium channels / Sensory processing of sound by outer hair cells of the cochlea / Sensory processing of sound by inner hair cells of the cochlea / inner ear morphogenesis / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane / presynaptic endocytosis / regulation of cardiac muscle cell action potential / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction ...Voltage gated Potassium channels / Sensory processing of sound by outer hair cells of the cochlea / Sensory processing of sound by inner hair cells of the cochlea / inner ear morphogenesis / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane / presynaptic endocytosis / regulation of cardiac muscle cell action potential / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / negative regulation of ryanodine-sensitive calcium-release channel activity / calcineurin-mediated signaling / protein phosphatase activator activity / adenylate cyclase binding / voltage-gated potassium channel activity / catalytic complex / potassium channel activity / detection of calcium ion / regulation of cardiac muscle contraction / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / presynaptic cytosol / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / regulation of calcium-mediated signaling / titin binding / voltage-gated potassium channel complex / potassium ion transmembrane transport / sperm midpiece / substantia nigra development / calcium channel complex / calyx of Held / adenylate cyclase activator activity / regulation of heart rate / bioluminescence / protein serine/threonine kinase activator activity / sarcomere / regulation of cytokinesis / basal plasma membrane / generation of precursor metabolites and energy / spindle microtubule / sensory perception of sound / potassium ion transport / long-term synaptic potentiation / response to calcium ion / spindle pole / calcium-dependent protein binding / G2/M transition of mitotic cell cycle / myelin sheath / vesicle / transmembrane transporter binding / G protein-coupled receptor signaling pathway / centrosome / calcium ion binding / protein kinase binding / protein-containing complex / nucleus / plasma membrane / cytoplasm 類似検索 - 分子機能
Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / : / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / EF-hand domain pair / EF-hand, calcium binding motif ...Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / : / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / Ion transport domain / Ion transport protein / EF-hand domain pair 類似検索 - ドメイン・相同性
Calmodulin-3 / Green fluorescent protein / Potassium voltage-gated channel subfamily KQT member 4 類似検索 - 構成要素
ジャーナル: Mol Cell / 年: 2021 タイトル: Structural Basis for the Modulation of Human KCNQ4 by Small-Molecule Drugs. 著者: Tian Li / Kun Wu / Zhenlei Yue / Yifei Wang / Fan Zhang / Huaizong Shen / 要旨: Among the five KCNQ channels, also known as the K7 voltage-gated potassium (K) channels, KCNQ2-KCNQ5 control neuronal excitability. Dysfunctions of KCNQ2-KCNQ5 are associated with neurological ...Among the five KCNQ channels, also known as the K7 voltage-gated potassium (K) channels, KCNQ2-KCNQ5 control neuronal excitability. Dysfunctions of KCNQ2-KCNQ5 are associated with neurological disorders such as epilepsy, deafness, and neuropathic pain. Here, we report the cryoelectron microscopy (cryo-EM) structures of human KCNQ4 and its complexes with the opener retigabine or the blocker linopirdine at overall resolutions of 2.5, 3.1, and 3.3 Å, respectively. In all structures, a phosphatidylinositol 4,5-bisphosphate (PIP) molecule inserts its head group into a cavity within each voltage-sensing domain (VSD), revealing an unobserved binding mode for PIP. Retigabine nestles in each fenestration, inducing local shifts. Instead of staying within the central pore, linopirdine resides in a cytosolic cavity underneath the inner gate. Electrophysiological analyses of various mutants corroborated the structural observations. Our studies reveal the molecular basis for the modulatory mechanism of neuronal KCNQ channels and provide a framework for structure-facilitated drug discovery targeting these important channels.