+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7dtc | ||||||
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タイトル | voltage-gated sodium channel Nav1.5-E1784K | ||||||
要素 | Sodium channel protein type 5 subunit alphaナトリウムチャネル | ||||||
キーワード | MEMBRANE PROTEIN (膜タンパク質) / voltage-gated sodium channel (ナトリウムチャネル) | ||||||
機能・相同性 | 機能・相同性情報 voltage-gated sodium channel activity involved in AV node cell action potential / voltage-gated sodium channel activity involved in bundle of His cell action potential / voltage-gated sodium channel activity involved in SA node cell action potential / bundle of His cell action potential / AV node cell action potential / SA node cell action potential / AV node cell to bundle of His cell communication / membrane depolarization during SA node cell action potential / cardiac ventricle development / response to denervation involved in regulation of muscle adaptation ...voltage-gated sodium channel activity involved in AV node cell action potential / voltage-gated sodium channel activity involved in bundle of His cell action potential / voltage-gated sodium channel activity involved in SA node cell action potential / bundle of His cell action potential / AV node cell action potential / SA node cell action potential / AV node cell to bundle of His cell communication / membrane depolarization during SA node cell action potential / cardiac ventricle development / response to denervation involved in regulation of muscle adaptation / regulation of ventricular cardiac muscle cell membrane depolarization / regulation of atrial cardiac muscle cell membrane repolarization / membrane depolarization during atrial cardiac muscle cell action potential / membrane depolarization during action potential / voltage-gated sodium channel activity involved in Purkinje myocyte action potential / regulation of sodium ion transmembrane transport / brainstem development / membrane depolarization during AV node cell action potential / voltage-gated sodium channel activity involved in cardiac muscle cell action potential / membrane depolarization during bundle of His cell action potential / positive regulation of action potential / atrial cardiac muscle cell action potential / membrane depolarization during Purkinje myocyte cell action potential / telencephalon development / cardiac conduction system development / regulation of atrial cardiac muscle cell membrane depolarization / voltage-gated sodium channel complex / membrane depolarization during cardiac muscle cell action potential / positive regulation of sodium ion transport / cardiac muscle cell action potential involved in contraction / ventricular cardiac muscle cell action potential / high voltage-gated calcium channel activity / regulation of cardiac muscle cell contraction / voltage-gated sodium channel activity / regulation of ventricular cardiac muscle cell membrane repolarization / Interaction between L1 and Ankyrins / ankyrin binding / sodium ion transport / fibroblast growth factor binding / voltage-gated calcium channel complex / nitric-oxide synthase binding / Phase 0 - rapid depolarisation / odontogenesis of dentin-containing tooth / regulation of heart rate by cardiac conduction / 脱分極 / calcium ion import across plasma membrane / sodium ion transmembrane transport / 介在板 / lateral plasma membrane / cardiac muscle contraction / 横行小管 / cellular response to calcium ion / regulation of heart rate / cerebellum development / positive regulation of epithelial cell proliferation / カベオラ / 筋鞘 / Z disc / scaffold protein binding / transmembrane transporter binding / calmodulin binding / protein domain specific binding / ubiquitin protein ligase binding / 核小体 / protein kinase binding / perinuclear region of cytoplasm / enzyme binding / 細胞膜 / 小胞体 / 核質 / 生体膜 / 細胞膜 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 | Yan, N. / Pan, X. / Li, Z. | ||||||
資金援助 | 中国, 1件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2021 タイトル: Structure of human Na1.5 reveals the fast inactivation-related segments as a mutational hotspot for the long QT syndrome. 著者: Zhangqiang Li / Xueqin Jin / Tong Wu / Xin Zhao / Weipeng Wang / Jianlin Lei / Xiaojing Pan / Nieng Yan / 要旨: Na1.5 is the primary voltage-gated Na (Na) channel in the heart. Mutations of Na1.5 are associated with various cardiac disorders exemplified by the type 3 long QT syndrome (LQT3) and Brugada ...Na1.5 is the primary voltage-gated Na (Na) channel in the heart. Mutations of Na1.5 are associated with various cardiac disorders exemplified by the type 3 long QT syndrome (LQT3) and Brugada syndrome (BrS). E1784K is a common mutation that has been found in both LQT3 and BrS patients. Here we present the cryo-EM structure of the human Na1.5-E1784K variant at an overall resolution of 3.3 Å. The structure is nearly identical to that of the wild-type human Na1.5 bound to quinidine. Structural mapping of 91- and 178-point mutations that are respectively associated with LQT3 and BrS reveals a unique distribution pattern for LQT3 mutations. Whereas the BrS mutations spread evenly on the structure, LQT3 mutations are clustered mainly to the segments in repeats III and IV that are involved in gating, voltage-sensing, and particularly inactivation. A mutational hotspot involving the fast inactivation segments is identified and can be mechanistically interpreted by our "door wedge" model for fast inactivation. The structural analysis presented here, with a focus on the impact of mutations on inactivation and late sodium current, establishes a structure-function relationship for the mechanistic understanding of Na1.5 channelopathies. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7dtc.cif.gz | 234.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7dtc.ent.gz | 179.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7dtc.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/dt/7dtc ftp://data.pdbj.org/pub/pdb/validation_reports/dt/7dtc | HTTPS FTP |
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-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 231744.000 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SCN5A / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q14524 | ||
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#2: 糖 | ChemComp-NAG / 研究の焦点であるリガンドがあるか | Y | |
-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 |
-試料調製
構成要素 | 名称: voltage-gated sodium channelナトリウムチャネル タイプ: COMPLEX / Entity ID: #1 / 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: 7.5 |
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 |
-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 FIELDBright-field microscopy |
撮影 | 電子線照射量: 24 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.15.2_3472: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||
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: 147600 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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