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基本情報
登録情報 | データベース: EMDB / ID: EMD-31025 | |||||||||
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タイトル | Phenix sharpen map of a membrane ion channel | |||||||||
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機能・相同性 | ![]() ATP transmembrane transporter activity / ATP transport / leak channel activity / Electric Transmission Across Gap Junctions / positive regulation of interleukin-1 alpha production / wide pore channel activity / bleb / monoatomic anion transmembrane transport / gap junction / monoatomic anion channel activity ...ATP transmembrane transporter activity / ATP transport / leak channel activity / Electric Transmission Across Gap Junctions / positive regulation of interleukin-1 alpha production / wide pore channel activity / bleb / monoatomic anion transmembrane transport / gap junction / monoatomic anion channel activity / 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 / positive regulation of interleukin-1 beta production / response to ischemia / calcium channel activity / calcium ion transport / actin filament binding / cell-cell signaling / protease binding / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / scaffold protein binding / transmembrane transporter binding / signaling receptor binding / endoplasmic reticulum membrane / structural molecule activity / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.15 Å | |||||||||
![]() | Zhang SS | |||||||||
![]() | ![]() タイトル: Structure of the full-length human Pannexin1 channel and insights into its role in pyroptosis. 著者: Sensen Zhang / Baolei Yuan / Jordy Homing Lam / Jun Zhou / Xuan Zhou / Gerardo Ramos-Mandujano / Xueyuan Tian / Yang Liu / Renmin Han / Yu Li / Xin Gao / Mo Li / Maojun Yang / ![]() ![]() ![]() 要旨: Pannexin1 (PANX1) is a large-pore ATP efflux channel with a broad distribution, which allows the exchange of molecules and ions smaller than 1 kDa between the cytoplasm and extracellular space. In ...Pannexin1 (PANX1) is a large-pore ATP efflux channel with a broad distribution, which allows the exchange of molecules and ions smaller than 1 kDa between the cytoplasm and extracellular space. In this study, we show that in human macrophages PANX1 expression is upregulated by diverse stimuli that promote pyroptosis, which is reminiscent of the previously reported lipopolysaccharide-induced upregulation of PANX1 during inflammasome activation. To further elucidate the function of PANX1, we propose the full-length human Pannexin1 (hPANX1) model through cryo-electron microscopy (cryo-EM) and molecular dynamics (MD) simulation studies, establishing hPANX1 as a homo-heptamer and revealing that both the N-termini and C-termini protrude deeply into the channel pore funnel. MD simulations also elucidate key energetic features governing the channel that lay a foundation to understand the channel gating mechanism. Structural analyses, functional characterizations, and computational studies support the current hPANX1-MD model, suggesting the potential role of hPANX1 in pyroptosis during immune responses. | |||||||||
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 | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ダウンロードとリンク
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マップデータ | ![]() | 27.4 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 7.1 KB 7.1 KB | 表示 表示 | ![]() |
画像 | ![]() | 28 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.08 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : plasma membrane protein
全体 | 名称: plasma membrane protein |
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要素 |
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-超分子 #1: plasma membrane protein
超分子 | 名称: plasma membrane protein / タイプ: cell / ID: 1 / 親要素: 0 |
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由来(天然) | 生物種: ![]() |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.4 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 50.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 3.15 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 110000 |
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初期 角度割当 | タイプ: ANGULAR RECONSTITUTION |
最終 角度割当 | タイプ: ANGULAR RECONSTITUTION |