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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 7byn | |||||||||||||||||||||||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of human KCNQ4 with linopirdine | |||||||||||||||||||||||||||||||||||||||||||||
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キーワード | MEMBRANE PROTEIN / KCNQ / Channel / Calmodulin / PIP2 / linopirdine | |||||||||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報transporter inhibitor activity / : / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / Sensory processing of sound by inner hair cells of the cochlea / Sensory processing of sound by outer hair cells of the cochlea / inner ear morphogenesis / response to corticosterone / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane ...transporter inhibitor activity / : / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / Sensory processing of sound by inner hair cells of the cochlea / Sensory processing of sound by outer hair cells of the cochlea / inner ear morphogenesis / response to corticosterone / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / nitric-oxide synthase binding / presynaptic endocytosis / regulation of synaptic vesicle exocytosis / regulation of cell communication by electrical coupling involved in cardiac conduction / calcineurin-mediated signaling / adenylate cyclase binding / protein phosphatase activator activity / voltage-gated potassium channel activity / regulation of synaptic vesicle endocytosis / detection of calcium ion / potassium channel activity / regulation of cardiac muscle contraction / postsynaptic cytosol / catalytic complex / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / phosphatidylinositol 3-kinase binding / presynaptic cytosol / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / titin binding / regulation of calcium-mediated signaling / voltage-gated potassium channel complex / potassium ion transmembrane transport / calcium channel complex / substantia nigra development / regulation of heart rate / basal plasma membrane / calyx of Held / bioluminescence / response to amphetamine / nitric-oxide synthase regulator activity / adenylate cyclase activator activity / protein serine/threonine kinase activator activity / sarcomere / regulation of cytokinesis / spindle microtubule / generation of precursor metabolites and energy / calcium channel regulator activity / sperm midpiece / sensory perception of sound / response to calcium ion / potassium ion transport / mitochondrial membrane / G2/M transition of mitotic cell cycle / Schaffer collateral - CA1 synapse / spindle pole / calcium-dependent protein binding / synaptic vesicle membrane / long-term synaptic potentiation / myelin sheath / growth cone / vesicle / transmembrane transporter binding / G protein-coupled receptor signaling pathway / protein domain specific binding / calcium ion binding / centrosome / protein kinase binding / protein-containing complex / nucleus / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||
| 生物種 | ![]() Homo sapiens (ヒト) | |||||||||||||||||||||||||||||||||||||||||||||
| 手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.3 Å | |||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Shen, H. / Li, T. / Yue, Z. | |||||||||||||||||||||||||||||||||||||||||||||
引用 | 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. | |||||||||||||||||||||||||||||||||||||||||||||
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構造の表示
| ムービー |
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| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 7byn.cif.gz | 429.7 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb7byn.ent.gz | 321.8 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 7byn.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/by/7byn ftp://data.pdbj.org/pub/pdb/validation_reports/by/7byn | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: タンパク質 | 分子量: 109327.836 Da / 分子数: 4 / 変異: F64L/S65T/K107T/A206K/H231L / 由来タイプ: 組換発現 由来: (組換発現) ![]() Homo sapiens (ヒト)遺伝子: GFP, KCNQ4 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P42212, UniProt: P56696#2: タンパク質 | 分子量: 16852.545 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CALM3, CALML2, CAM3, CAMC, CAMIII / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0DP25#3: 化合物 | ChemComp-PT5 / [( #4: 化合物 | #5: 化合物 | ChemComp-FCC / | 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
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| EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
| 構成要素 | 名称: Complex of human KCNQ4 and linopirdine / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 緩衝液 | pH: 8 |
| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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| 顕微鏡 | モデル: FEI TITAN KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD |
| 撮影 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| ソフトウェア | 名称: PHENIX / バージョン: 1.17.1_3660: / 分類: 精密化 | ||||||||||||||||||||||||
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| EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
| CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 229040 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
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万見について





Homo sapiens (ヒト)
引用
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