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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: 6v00 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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| タイトル | structure of human KCNQ1-KCNE3-CaM complex | |||||||||||||||||||||||||||||||||||||||||||||||||||
要素 |
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キーワード | MEMBRANE PROTEIN / potassium channel / KCNQ1 / CaM | |||||||||||||||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報negative regulation of membrane repolarization during ventricular cardiac muscle cell action potential / gastrin-induced gastric acid secretion / corticosterone secretion / voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization / basolateral part of cell / lumenal side of membrane / negative regulation of voltage-gated potassium channel activity / rhythmic behavior / stomach development / iodide transport ...negative regulation of membrane repolarization during ventricular cardiac muscle cell action potential / gastrin-induced gastric acid secretion / corticosterone secretion / voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization / basolateral part of cell / lumenal side of membrane / negative regulation of voltage-gated potassium channel activity / rhythmic behavior / stomach development / iodide transport / regulation of gastric acid secretion / voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization / Phase 3 - rapid repolarisation / membrane repolarization during atrial cardiac muscle cell action potential / membrane repolarization during action potential / negative regulation of potassium ion export across plasma membrane / Phase 2 - plateau phase / regulation of atrial cardiac muscle cell membrane repolarization / intracellular chloride ion homeostasis / membrane repolarization during ventricular cardiac muscle cell action potential / membrane repolarization during cardiac muscle cell action potential / negative regulation of delayed rectifier potassium channel activity / potassium ion export across plasma membrane / renal sodium ion absorption / voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization / atrial cardiac muscle cell action potential / auditory receptor cell development / regulation of membrane repolarization / protein phosphatase 1 binding / detection of mechanical stimulus involved in sensory perception of sound / delayed rectifier potassium channel activity / ventricular cardiac muscle cell action potential / potassium ion homeostasis / Voltage gated Potassium channels / positive regulation of potassium ion transmembrane transport / regulation of ventricular cardiac muscle cell membrane repolarization / non-motile cilium assembly / outward rectifier potassium channel activity / cardiac muscle cell contraction / CaM pathway / Cam-PDE 1 activation / intestinal absorption / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Loss of phosphorylation of MECP2 at T308 / inner ear morphogenesis / CREB1 phosphorylation through the activation of Adenylate Cyclase / neuronal cell body membrane / CaMK IV-mediated phosphorylation of CREB / PKA activation / negative regulation of high voltage-gated calcium channel activity / Glycogen breakdown (glycogenolysis) / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / sodium ion transport / negative regulation of ryanodine-sensitive calcium-release channel activity / organelle localization by membrane tethering / adrenergic receptor signaling pathway / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / ciliary base / renal absorption / regulation of heart contraction / presynaptic endocytosis / protein kinase A regulatory subunit binding / Synthesis of IP3 and IP4 in the cytosol / protein kinase A catalytic subunit binding / regulation of cell communication by electrical coupling involved in cardiac conduction / Phase 0 - rapid depolarisation / potassium ion import across plasma membrane / calcineurin-mediated signaling / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / inner ear development / RHO GTPases activate PAKs / regulation of heart rate by cardiac conduction / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / action potential / regulation of ryanodine-sensitive calcium-release channel activity / protein phosphatase activator activity / Long-term potentiation / cochlea development / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / social behavior / DARPP-32 events / voltage-gated potassium channel activity / catalytic complex / Smooth Muscle Contraction / monoatomic ion channel complex / detection of calcium ion / regulation of cardiac muscle contraction / potassium channel regulator activity / RHO GTPases activate IQGAPs 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト) Anaplasma marginale (バクテリア) | |||||||||||||||||||||||||||||||||||||||||||||||||||
| 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: 3.1 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Mackinnon, R. / Sun, J. | |||||||||||||||||||||||||||||||||||||||||||||||||||
| 資金援助 | 米国, 2件
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引用 | ジャーナル: Cell / 年: 2020タイトル: Structural Basis of Human KCNQ1 Modulation and Gating. 著者: Ji Sun / Roderick MacKinnon / ![]() 要旨: KCNQ1, also known as Kv7.1, is a voltage-dependent K channel that regulates gastric acid secretion, salt and glucose homeostasis, and heart rhythm. Its functional properties are regulated in a tissue- ...KCNQ1, also known as Kv7.1, is a voltage-dependent K channel that regulates gastric acid secretion, salt and glucose homeostasis, and heart rhythm. Its functional properties are regulated in a tissue-specific manner through co-assembly with beta subunits KCNE1-5. In non-excitable cells, KCNQ1 forms a complex with KCNE3, which suppresses channel closure at negative membrane voltages that otherwise would close it. Pore opening is regulated by the signaling lipid PIP2. Using cryoelectron microscopy (cryo-EM), we show that KCNE3 tucks its single-membrane-spanning helix against KCNQ1, at a location that appears to lock the voltage sensor in its depolarized conformation. Without PIP2, the pore remains closed. Upon addition, PIP2 occupies a site on KCNQ1 within the inner membrane leaflet, which triggers a large conformational change that leads to dilation of the pore's gate. It is likely that this mechanism of PIP2 activation is conserved among Kv7 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 | 6v00.cif.gz | 428.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb6v00.ent.gz | 323.1 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 6v00.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
| 文書・要旨 | 6v00_validation.pdf.gz | 992.6 KB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 6v00_full_validation.pdf.gz | 999.7 KB | 表示 | |
| XML形式データ | 6v00_validation.xml.gz | 56.2 KB | 表示 | |
| CIF形式データ | 6v00_validation.cif.gz | 86.8 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/v0/6v00 ftp://data.pdbj.org/pub/pdb/validation_reports/v0/6v00 | HTTPS FTP |
-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: 63258.574 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: KCNQ1, KCNA8, KCNA9, KVLQT1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P51787#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: CALM1, CALM, CAM, CAM1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0DP23#3: タンパク質 | 分子量: 40095.168 Da / 分子数: 4 / 由来タイプ: 組換発現 由来: (組換発現) Anaplasma marginale (バクテリア), (組換発現) Homo sapiens (ヒト)遺伝子: mCherry, KCNE3 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: X5DSL3, UniProt: Q9Y6H6#4: 化合物 | ChemComp-CA / 研究の焦点であるリガンドがあるか | N | 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: KCNQ1-CaM complex / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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| 分子量 | 実験値: NO |
| 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 | 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: 94 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
| ソフトウェア | 名称: PHENIX / バージョン: 1.13_2998: / 分類: 精密化 | |||||||||
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| EMソフトウェア |
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| CTF補正 | タイプ: NONE | |||||||||
| 3次元再構成 | 解像度: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 39074 / 対称性のタイプ: POINT | |||||||||
| 原子モデル構築 | プロトコル: AB INITIO MODEL |
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コントローラー
万見について




Homo sapiens (ヒト)
Anaplasma marginale (バクテリア)
米国, 2件
引用
UCSF Chimera











PDBj


























