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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: 6bqn | ||||||
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タイトル | Cryo-EM structure of ENaC | ||||||
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![]() | MEMBRANE PROTEIN / sodium channel | ||||||
機能・相同性 | ![]() : / : / sensory perception of salty taste / Sensory perception of salty taste / aldosterone metabolic process / neutrophil-mediated killing of bacterium / sensory perception of sour taste / leukocyte activation involved in inflammatory response / cellular response to vasopressin / sperm principal piece ...: / : / sensory perception of salty taste / Sensory perception of salty taste / aldosterone metabolic process / neutrophil-mediated killing of bacterium / sensory perception of sour taste / leukocyte activation involved in inflammatory response / cellular response to vasopressin / sperm principal piece / sodium channel complex / ligand-gated sodium channel activity / epithelial fluid transport / sodium ion homeostasis / artery smooth muscle contraction / mucus secretion / WW domain binding / neutrophil activation involved in immune response / cellular response to aldosterone / multicellular organismal-level water homeostasis / cellular response to acidic pH / potassium ion homeostasis / sodium ion import across plasma membrane / intracellular sodium ion homeostasis / sodium channel activity / motile cilium / erythrocyte homeostasis / ciliary membrane / response to food / sodium ion transport / sodium ion transmembrane transport / acrosomal vesicle / cytoplasmic vesicle membrane / multicellular organism growth / Stimuli-sensing channels / regulation of blood pressure / monoatomic ion channel activity / gene expression / response to xenobiotic stimulus / apical plasma membrane / external side of plasma membrane / extracellular exosome / nucleoplasm / plasma membrane / cytoplasm / cytosol 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: 3.9 Å | ||||||
![]() | Noreng, S. / Bharadwaj, A. / Posert, R. / Yoshioka, C. / Baconguis, I. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of the human epithelial sodium channel by cryo-electron microscopy. 著者: Sigrid Noreng / Arpita Bharadwaj / Richard Posert / Craig Yoshioka / Isabelle Baconguis / ![]() 要旨: The epithelial sodium channel (ENaC), a member of the ENaC/DEG superfamily, regulates Na and water homeostasis. ENaCs assemble as heterotrimeric channels that harbor protease-sensitive domains ...The epithelial sodium channel (ENaC), a member of the ENaC/DEG superfamily, regulates Na and water homeostasis. ENaCs assemble as heterotrimeric channels that harbor protease-sensitive domains critical for gating the channel. Here, we present the structure of human ENaC in the uncleaved state determined by single-particle cryo-electron microscopy. The ion channel is composed of a large extracellular domain and a narrow transmembrane domain. The structure reveals that ENaC assembles with a 1:1:1 stoichiometry of α:β:γ subunits arranged in a counter-clockwise manner. The shape of each subunit is reminiscent of a hand with key gating domains of a 'finger' and a 'thumb.' Wedged between these domains is the elusive protease-sensitive inhibitory domain poised to regulate conformational changes of the 'finger' and 'thumb'; thus, the structure provides the first view of the architecture of inhibition of ENaC. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 290.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 236.6 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1013.5 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1023.2 KB | 表示 | |
XML形式データ | ![]() | 49.6 KB | 表示 | |
CIF形式データ | ![]() | 76.8 KB | 表示 | |
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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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要素
-抗体 , 7種, 7分子 ABCDEFG
#1: 抗体 | 分子量: 54038.953 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Transmembrane helices have been built with poly UNK since the density for the transmembrane domain is not good enough to accurately build a model. Residues that have not been built is due to ...詳細: Transmembrane helices have been built with poly UNK since the density for the transmembrane domain is not good enough to accurately build a model. Residues that have not been built is due to flexible areas of the protein where density is missing. The full sequence is described in sequence details. 由来: (組換発現) ![]() ![]() |
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#2: 抗体 | 分子量: 55038.633 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Transmembrane helices have been built with poly UNK since the density for the transmembrane domain is not good enough to accurately build a model. Residues that have not been built is due to ...詳細: Transmembrane helices have been built with poly UNK since the density for the transmembrane domain is not good enough to accurately build a model. Residues that have not been built is due to flexible areas of the protein where density is missing. The full sequence is described in sequence details. 由来: (組換発現) ![]() ![]() |
#3: 抗体 | 分子量: 55834.457 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: The protein is EGFP-SCNN1G chimera. Transmembrane helices have been built with poly UNK since the density for the transmembrane domain is not good enough to accurately build a model. Residues ...詳細: The protein is EGFP-SCNN1G chimera. Transmembrane helices have been built with poly UNK since the density for the transmembrane domain is not good enough to accurately build a model. Residues that have not been built is due to flexible areas of the protein where density is missing. The first 260 residues is a His8 tag and a strep-tag followed by EGFP (UniProt accession code: C5MKY7). The full sequence is described in sequence details. 由来: (組換発現) ![]() ![]() |
#4: 抗体 | 分子量: 9039.134 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: Sequence unknown, built with poly UNK. / 由来: (天然) ![]() ![]() |
#5: 抗体 | 分子量: 10315.707 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: Sequence unknown, built with poly UNK. / 由来: (天然) ![]() ![]() |
#6: 抗体 | 分子量: 9805.078 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: Sequence unknown, built with poly UNK. / 由来: (天然) ![]() ![]() |
#7: 抗体 | 分子量: 9549.763 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: Sequence unknown, built with poly UNK. / 由来: (天然) ![]() ![]() |
-詳細
配列の詳細 | The sequence of SCNNIA is MAEEEALIEFHRSYRELFEFFANNTTIHGAIRLVSSQHNRMKTAFWAVLWLATFGMMYWQFGLLFGEY ...The sequence of SCNNIA is MAEEEALIEF |
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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: Membrane protein complex / タイプ: CELL / 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: 8 |
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: ![]() |
電子レンズ | モード: OTHER |
撮影 | 電子線照射量: 60 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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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 304615 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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