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基本情報
| 登録情報 | データベース: PDB / ID: 7vnq | ||||||
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| タイトル | Structure of human KCNQ4-ML213 complex in nanodisc | ||||||
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キーワード | MEMBRANE PROTEIN / KCNQ4 / ML213 / cryo-EM / nanodisc | ||||||
| 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 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 / response to corticosterone / regulation of synaptic vesicle exocytosis ...transporter inhibitor activity / : / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / 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 / response to corticosterone / regulation of synaptic vesicle exocytosis / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / presynaptic endocytosis / calcineurin-mediated signaling / nitric-oxide synthase binding / regulation of cell communication by electrical coupling involved in cardiac conduction / adenylate cyclase binding / protein phosphatase activator activity / carbohydrate transmembrane transporter activity / maltose binding / voltage-gated potassium channel activity / regulation of synaptic vesicle endocytosis / maltose transport / maltodextrin transmembrane transport / potassium channel activity / detection of calcium ion / regulation of cardiac muscle contraction / postsynaptic cytosol / catalytic complex / phosphatidylinositol 3-kinase binding / presynaptic cytosol / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / titin binding / regulation of calcium-mediated signaling / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / 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 / nitric-oxide synthase regulator activity / adenylate cyclase activator activity / response to amphetamine / regulation of cytokinesis / sarcomere / protein serine/threonine kinase activator activity / spindle microtubule / calcium channel regulator activity / potassium ion transport / sensory perception of sound / response to calcium ion / G2/M transition of mitotic cell cycle / Schaffer collateral - CA1 synapse / mitochondrial membrane / spindle pole / calcium-dependent protein binding / long-term synaptic potentiation / myelin sheath / synaptic vesicle membrane / outer membrane-bounded periplasmic space / growth cone / sperm midpiece / 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: 2.96 Å | ||||||
データ登録者 | Xu, F. / Zheng, Y. | ||||||
| 資金援助 | 中国, 1件
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引用 | ジャーナル: Neuron / 年: 2022タイトル: Structural insights into the lipid and ligand regulation of a human neuronal KCNQ channel. 著者: You Zheng / Heng Liu / Yuxin Chen / Shaowei Dong / Fang Wang / Shengyi Wang / Geng-Lin Li / Yilai Shu / Fei Xu / ![]() 要旨: The KCNQ family (KCNQ1-KCNQ5) of voltage-gated potassium channels plays critical roles in many physiological and pathological processes. It is known that the channel opening of all KCNQs relies on ...The KCNQ family (KCNQ1-KCNQ5) of voltage-gated potassium channels plays critical roles in many physiological and pathological processes. It is known that the channel opening of all KCNQs relies on the signaling lipid molecule phosphatidylinositol 4,5-bisphosphate (PIP2). However, the molecular mechanism of PIP2 in modulating the opening of the four neuronal KCNQ channels (KCNQ2-KCNQ5), which are essential for regulating neuronal excitability, remains largely elusive. Here, we report the cryoelectron microscopy (cryo-EM) structures of human KCNQ4 determined in complex with the activator ML213 in the absence or presence of PIP2. Two PIP2 molecules are identified in the open-state structure of KCNQ4, which act as a bridge to couple the voltage-sensing domain (VSD) and pore domain (PD) of KCNQ4 leading to the channel opening. Our findings reveal the binding sites and activation mechanisms of ML213 and PIP2 for neuronal KCNQ channels, providing a framework for therapeutic intervention targeting on these important channels. | ||||||
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構造の表示
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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 | 7vnq.cif.gz | 414.9 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb7vnq.ent.gz | 306.2 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 7vnq.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/vn/7vnq ftp://data.pdbj.org/pub/pdb/validation_reports/vn/7vnq | 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: 116541.383 Da / 分子数: 4 / 由来タイプ: 組換発現 詳細: The fusion protein of Potassium voltage-gated channel subfamily KQT member 4, linker, and Maltodextrin-binding protein 由来: (組換発現) Homo sapiens (ヒト), (組換発現) ![]() 遺伝子: KCNQ4, ECBD_4002 / 株: B / BL21-DE3 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P56696, UniProt: A0A140NCD0#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-7YV / ( #4: 化合物 | 研究の焦点であるリガンドがあるか | Y | |
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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: KCNQ4-ML213 complex in nanodisc / 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: 7.4 |
| 試料 | 濃度: 2 mg/ml / 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: DARK FIELD |
| 撮影 | 電子線照射量: 16.8 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3次元再構成 | 解像度: 2.96 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 69573 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)

中国, 1件
引用
UCSF Chimera












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