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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: 6byo | |||||||||
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| タイトル | Residue assignment correction to the voltage gated calcium Cav1.1 rabbit alpha 1 subunit PDB entries 3JBR & 5GJV | |||||||||
要素 | Voltage-dependent L-type calcium channel subunit alpha-1S | |||||||||
キーワード | MEMBRANE PROTEIN / Voltage-Gated Calcium Channels | |||||||||
| 機能・相同性 | 機能・相同性情報high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / positive regulation of muscle contraction / cellular response to caffeine / calcium ion import across plasma membrane / regulation of ryanodine-sensitive calcium-release channel activity / voltage-gated calcium channel activity / release of sequestered calcium ion into cytosol / T-tubule / muscle contraction ...high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / positive regulation of muscle contraction / cellular response to caffeine / calcium ion import across plasma membrane / regulation of ryanodine-sensitive calcium-release channel activity / voltage-gated calcium channel activity / release of sequestered calcium ion into cytosol / T-tubule / muscle contraction / calcium ion transmembrane transport / transmembrane transporter binding / calmodulin binding / metal ion binding / plasma membrane 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: 3.6 Å | |||||||||
データ登録者 | Cardozo, T.J. / Martinez-Ortiz, W. | |||||||||
| 資金援助 | 米国, 2件
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引用 | ジャーナル: Nature / 年: 2016タイトル: Structure of the voltage-gated calcium channel Ca(v)1.1 at 3.6 Å resolution. 著者: Jianping Wu / Zhen Yan / Zhangqiang Li / Xingyang Qian / Shan Lu / Mengqiu Dong / Qiang Zhou / Nieng Yan / ![]() 要旨: The voltage-gated calcium (Ca) channels convert membrane electrical signals to intracellular Ca-mediated events. Among the ten subtypes of Ca channel in mammals, Ca1.1 is specified for the excitation- ...The voltage-gated calcium (Ca) channels convert membrane electrical signals to intracellular Ca-mediated events. Among the ten subtypes of Ca channel in mammals, Ca1.1 is specified for the excitation-contraction coupling of skeletal muscles. Here we present the cryo-electron microscopy structure of the rabbit Ca1.1 complex at a nominal resolution of 3.6 Å. The inner gate of the ion-conducting α1-subunit is closed and all four voltage-sensing domains adopt an 'up' conformation, suggesting a potentially inactivated state. The extended extracellular loops of the pore domain, which are stabilized by multiple disulfide bonds, form a windowed dome above the selectivity filter. One side of the dome provides the docking site for the α2δ-1-subunit, while the other side may attract cations through its negative surface potential. The intracellular I-II and III-IV linker helices interact with the β-subunit and the carboxy-terminal domain of α1, respectively. Classification of the particles yielded two additional reconstructions that reveal pronounced displacement of β and adjacent elements in α1. The atomic model of the Ca1.1 complex establishes a foundation for mechanistic understanding of excitation-contraction coupling and provides a three-dimensional template for molecular interpretations of the functions and disease mechanisms of Ca and Na channels. #1: ジャーナル: Science / 年: 2015タイトル: Structure of the voltage-gated calcium channel Cav1.1 complex. 著者: Jianping Wu / Zhen Yan / Zhangqiang Li / Chuangye Yan / Shan Lu / Mengqiu Dong / Nieng Yan / ![]() 要旨: The voltage-gated calcium channel Ca(v)1.1 is engaged in the excitation-contraction coupling of skeletal muscles. The Ca(v)1.1 complex consists of the pore-forming subunit α1 and auxiliary subunits ...The voltage-gated calcium channel Ca(v)1.1 is engaged in the excitation-contraction coupling of skeletal muscles. The Ca(v)1.1 complex consists of the pore-forming subunit α1 and auxiliary subunits α2δ, β, and γ. We report the structure of the rabbit Ca(v)1.1 complex determined by single-particle cryo-electron microscopy. The four homologous repeats of the α1 subunit are arranged clockwise in the extracellular view. The γ subunit, whose structure resembles claudins, interacts with the voltage-sensing domain of repeat IV (VSD(IV)), whereas the cytosolic β subunit is located adjacent to VSD(II) of α1. The α2 subunit interacts with the extracellular loops of repeats I to III through its VWA and Cache1 domains. The structure reveals the architecture of a prototypical eukaryotic Ca(v) channel and provides a framework for understanding the function and disease mechanisms of Ca(v) and Na(v) channels. | |||||||||
| 履歴 |
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| Remark 0 | THIS ENTRY 6BYO REFLECTS AN ALTERNATIVE MODELING OF THE ORIGINAL DATA IN EMD-9513, DETERMINED BY J.P.Wu,Z.Yan |
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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 | 6byo.cif.gz | 438.7 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb6byo.ent.gz | 358.1 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 6byo.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/6byo ftp://data.pdbj.org/pub/pdb/validation_reports/by/6byo | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 9513M M: このデータのモデリングに利用したマップデータ |
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| 類似構造データ |
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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: 155063.562 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
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| Has protein modification | 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 |
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試料調製
| 構成要素 | 名称: Rabbit Voltage Gated Calcium Cav1.1 alpha 1 subunit. タイプ: COMPLEX / Entity ID: all / 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: 6.5 |
| 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: NITROGEN |
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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: SPOT SCAN |
| 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 K2 SUMMIT (4k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / カテゴリ: モデルフィッティング |
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| CTF補正 | タイプ: NONE |
| 3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: OTHER / 粒子像の数: 527833 / 詳細: overall resolution of entire complex / 対称性のタイプ: POINT |
| 原子モデル構築 | プロトコル: RIGID BODY FIT |
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万見について






米国, 2件
引用
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