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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: 6wbn | ||||||||||||
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| タイトル | Cryo-EM structure of human Pannexin 1 channel N255A mutant, gap junction | ||||||||||||
要素 | Pannexin-1 | ||||||||||||
キーワード | TRANSPORT PROTEIN / ion channel | ||||||||||||
| 機能・相同性 | 機能・相同性情報ATP transmembrane transporter activity / ATP transport / leak channel activity / Electric Transmission Across Gap Junctions / positive regulation of interleukin-1 alpha production / monoatomic anion transmembrane transport / wide pore channel activity / bleb / monoatomic anion channel activity / gap junction ...ATP transmembrane transporter activity / ATP transport / leak channel activity / Electric Transmission Across Gap Junctions / positive regulation of interleukin-1 alpha production / monoatomic anion transmembrane transport / wide pore channel activity / bleb / monoatomic anion channel activity / gap junction / gap junction channel activity / positive regulation of macrophage cytokine production / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / oogenesis / response to ATP / The NLRP3 inflammasome / monoatomic cation transport / response to ischemia / positive regulation of interleukin-1 beta production / calcium channel activity / actin filament binding / calcium ion transport / cell-cell signaling / protease binding / scaffold protein binding / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / transmembrane transporter binding / signaling receptor binding / endoplasmic reticulum membrane / structural molecule activity / endoplasmic reticulum / protein-containing complex / membrane / identical protein binding / plasma membrane 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: 2.83 Å | ||||||||||||
データ登録者 | Lu, W. / Du, J. / Ruan, Z. | ||||||||||||
| 資金援助 | 米国, 3件
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引用 | ジャーナル: Nature / 年: 2020タイトル: Structures of human pannexin 1 reveal ion pathways and mechanism of gating. 著者: Zheng Ruan / Ian J Orozco / Juan Du / Wei Lü / ![]() 要旨: Pannexin 1 (PANX1) is an ATP-permeable channel with critical roles in a variety of physiological functions such as blood pressure regulation, apoptotic cell clearance and human oocyte development. ...Pannexin 1 (PANX1) is an ATP-permeable channel with critical roles in a variety of physiological functions such as blood pressure regulation, apoptotic cell clearance and human oocyte development. Here we present several structures of human PANX1 in a heptameric assembly at resolutions of up to 2.8 angström, including an apo state, a caspase-7-cleaved state and a carbenoxolone-bound state. We reveal a gating mechanism that involves two ion-conducting pathways. Under normal cellular conditions, the intracellular entry of the wide main pore is physically plugged by the C-terminal tail. Small anions are conducted through narrow tunnels in the intracellular domain. These tunnels connect to the main pore and are gated by a long linker between the N-terminal helix and the first transmembrane helix. During apoptosis, the C-terminal tail is cleaved by caspase, allowing the release of ATP through the main pore. We identified a carbenoxolone-binding site embraced by W74 in the extracellular entrance and a role for carbenoxolone as a channel blocker. We identified a gap-junction-like structure using a glycosylation-deficient mutant, N255A. Our studies provide a solid foundation for understanding the molecular mechanisms underlying the channel gating and inhibition of PANX1 and related large-pore channels. | ||||||||||||
| 履歴 |
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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 | 6wbn.cif.gz | 841.7 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb6wbn.ent.gz | 709.5 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 6wbn.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/wb/6wbn ftp://data.pdbj.org/pub/pdb/validation_reports/wb/6wbn | 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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| 1 |
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要素
| #1: タンパク質 | 分子量: 42204.418 Da / 分子数: 14 / 変異: N255A / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PANX1, MRS1, UNQ2529/PRO6028 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q96RD7#2: 化合物 | ChemComp-PTY / #3: 化合物 | ChemComp-3PE / #4: 化合物 | ChemComp-DGA / #5: 化合物 | ChemComp-CLR / 研究の焦点であるリガンドがあるか | N | Has protein modification | 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: Wild type human Pannexin 1 channel / 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: 8 |
| 試料 | 濃度: 7 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 試料支持 | 詳細: unspecified |
| 急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 291.15 K |
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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 | 平均露光時間: 8 sec. / 電子線照射量: 49.6 e/Å2 / 検出モード: SUPER-RESOLUTION 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 |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
| 粒子像の選択 | 選択した粒子像数: 3945051 | ||||||||||||||||||||||||||||||||||||||||
| 対称性 | 点対称性: C7 (7回回転対称) | ||||||||||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.83 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 78983 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL |
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コントローラー
万見について




Homo sapiens (ヒト)
米国, 3件
引用
UCSF Chimera






















PDBj



















