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基本情報
登録情報 | データベース: PDB / ID: 8fzq | |||||||||
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タイトル | Dehosphorylated, ATP-bound human cystic fibrosis transmembrane conductance regulator (CFTR) | |||||||||
![]() | Cystic fibrosis transmembrane conductance regulator | |||||||||
![]() | MEMBRANE PROTEIN / Ion Channel | |||||||||
機能・相同性 | ![]() positive regulation of voltage-gated chloride channel activity / positive regulation of cyclic nucleotide-gated ion channel activity / Sec61 translocon complex binding / channel-conductance-controlling ATPase / intracellularly ATP-gated chloride channel activity / positive regulation of enamel mineralization / transepithelial water transport / RHO GTPases regulate CFTR trafficking / intracellular pH elevation / amelogenesis ...positive regulation of voltage-gated chloride channel activity / positive regulation of cyclic nucleotide-gated ion channel activity / Sec61 translocon complex binding / channel-conductance-controlling ATPase / intracellularly ATP-gated chloride channel activity / positive regulation of enamel mineralization / transepithelial water transport / RHO GTPases regulate CFTR trafficking / intracellular pH elevation / amelogenesis / chloride channel inhibitor activity / ATPase-coupled inorganic anion transmembrane transporter activity / Golgi-associated vesicle membrane / multicellular organismal-level water homeostasis / cholesterol transport / membrane hyperpolarization / bicarbonate transport / bicarbonate transmembrane transporter activity / vesicle docking involved in exocytosis / chloride channel regulator activity / chloride transmembrane transporter activity / sperm capacitation / chloride channel activity / RHOQ GTPase cycle / cholesterol biosynthetic process / positive regulation of exocytosis / positive regulation of insulin secretion involved in cellular response to glucose stimulus / chloride channel complex / ATPase-coupled transmembrane transporter activity / ABC-type transporter activity / cellular response to cAMP / cellular response to forskolin / chloride transmembrane transport / response to endoplasmic reticulum stress / isomerase activity / establishment of localization in cell / PDZ domain binding / Defective CFTR causes cystic fibrosis / Late endosomal microautophagy / clathrin-coated endocytic vesicle membrane / ABC-family proteins mediated transport / recycling endosome / transmembrane transport / Aggrephagy / Chaperone Mediated Autophagy / recycling endosome membrane / Cargo recognition for clathrin-mediated endocytosis / Clathrin-mediated endocytosis / protein-folding chaperone binding / early endosome membrane / early endosome / endosome membrane / Ub-specific processing proteases / apical plasma membrane / lysosomal membrane / endoplasmic reticulum membrane / enzyme binding / cell surface / ATP hydrolysis activity / protein-containing complex / ATP binding / membrane / nucleus / plasma membrane / cytosol / cytoplasm 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: 4.3 Å | |||||||||
![]() | Levring, J. / Terry, D.S. / Kilic, Z. / Fitzgerald, G.A. / Blanchard, S.C. / Chen, J. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: CFTR function, pathology and pharmacology at single-molecule resolution. 著者: Jesper Levring / Daniel S Terry / Zeliha Kilic / Gabriel Fitzgerald / Scott C Blanchard / Jue Chen / ![]() 要旨: The cystic fibrosis transmembrane conductance regulator (CFTR) is an anion channel that regulates salt and fluid homeostasis across epithelial membranes. Alterations in CFTR cause cystic fibrosis, a ...The cystic fibrosis transmembrane conductance regulator (CFTR) is an anion channel that regulates salt and fluid homeostasis across epithelial membranes. Alterations in CFTR cause cystic fibrosis, a fatal disease without a cure. Electrophysiological properties of CFTR have been analysed for decades. The structure of CFTR, determined in two globally distinct conformations, underscores its evolutionary relationship with other ATP-binding cassette transporters. However, direct correlations between the essential functions of CFTR and extant structures are lacking at present. Here we combine ensemble functional measurements, single-molecule fluorescence resonance energy transfer, electrophysiology and kinetic simulations to show that the two nucleotide-binding domains (NBDs) of human CFTR dimerize before channel opening. CFTR exhibits an allosteric gating mechanism in which conformational changes within the NBD-dimerized channel, governed by ATP hydrolysis, regulate chloride conductance. The potentiators ivacaftor and GLPG1837 enhance channel activity by increasing pore opening while NBDs are dimerized. Disease-causing substitutions proximal (G551D) or distal (L927P) to the ATPase site both reduce the efficiency of NBD dimerization. These findings collectively enable the framing of a gating mechanism that informs on the search for more efficacious clinical therapies. | |||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 222.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 171.2 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.5 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.5 MB | 表示 | |
XML形式データ | ![]() | 44.5 KB | 表示 | |
CIF形式データ | ![]() | 64.5 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 29637MC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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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: 168859.062 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 参照: UniProt: P13569, channel-conductance-controlling ATPase | ||||||
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#2: 化合物 | #3: 化合物 | 研究の焦点であるリガンドがあるか | Y | 配列の詳細 | Residues visible in the regulatory domain were modeled as UNK because the identities of the ...Residues visible in the regulatory domain were modeled as UNK because the identities of the residues could not be established, and the register is unknown. The actual sequence of the entire contruct that was used for the EM sample is: MQRSPLEKAS | |
-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: Dephosphorylated, ATP-bound human cystic fibrosis transmembrane conductance regulator (CFTR) タイプ: COMPLEX / Entity ID: #1 / 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: 7.2 |
試料 | 濃度: 5.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: FEI VITROBOT MARK IV / 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: BRIGHT FIELD / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 800 nm |
撮影 | 電子線照射量: 75.4 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
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 4.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 157629 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 88.51 Å2 | ||||||||||||||||||||||||
拘束条件 |
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