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基本情報
登録情報 | データベース: PDB / ID: 7vnp | ||||||
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タイトル | Structure of human KCNQ4-ML213 complex with PIP2 | ||||||
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![]() | MEMBRANE PROTEIN / KCNQ4 / ML213 / PIP2 / cryo-EM | ||||||
機能・相同性 | ![]() 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 / negative regulation of high voltage-gated calcium channel activity / positive regulation of cyclic-nucleotide phosphodiesterase activity / negative regulation of calcium ion export across plasma membrane / inner ear morphogenesis / 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 / negative regulation of high voltage-gated calcium channel activity / positive regulation of cyclic-nucleotide phosphodiesterase activity / negative regulation of calcium ion export across plasma membrane / inner ear morphogenesis / 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 peptidyl-threonine phosphorylation / voltage-gated potassium channel activity / potassium channel activity / protein phosphatase activator activity / positive regulation of phosphoprotein phosphatase activity / adenylate cyclase binding / carbohydrate transmembrane transporter activity / catalytic complex / maltose binding / detection of calcium ion / regulation of cardiac muscle contraction / maltose transport / maltodextrin transmembrane transport / negative regulation of ryanodine-sensitive calcium-release channel activity / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / positive regulation of protein dephosphorylation / regulation of calcium-mediated signaling / titin binding / positive regulation of protein autophosphorylation / potassium ion transmembrane transport / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / substantia nigra development / adenylate cyclase activator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / basal plasma membrane / regulation of cytokinesis / positive regulation of peptidyl-threonine phosphorylation / sensory perception of sound / potassium ion transport / positive regulation of protein serine/threonine kinase activity / spindle microtubule / spindle pole / response to calcium ion / G2/M transition of mitotic cell cycle / calcium-dependent protein binding / myelin sheath / outer membrane-bounded periplasmic space / 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 | ||||||
生物種 | ![]() ![]() ![]() | ||||||
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: 2.79 Å | ||||||
![]() | Xu, F. / Zheng, Y. | ||||||
資金援助 | ![]()
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![]() | ![]() 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: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 404.5 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.5 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.6 MB | 表示 | |
XML形式データ | ![]() | 62.1 KB | 表示 | |
CIF形式データ | ![]() | 88.3 KB | 表示 | |
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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) ![]() ![]() ![]() 遺伝子: KCNQ4, ECBD_4002 / 株: B / BL21-DE3 / 発現宿主: ![]() #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) ![]() ![]() #3: 化合物 | ChemComp-PT5 / [( #4: 化合物 | ChemComp-K / #5: 化合物 | ChemComp-7YV / ( 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 with PIP2 / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
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 |
試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
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: ![]() |
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
ソフトウェア | 名称: PHENIX / バージョン: 1.18.2_3874: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.79 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 133661 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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