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基本情報
登録情報 | データベース: PDB / ID: 7zk3 | |||||||||
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タイトル | Structure of 1PBC- and calcium-bound mTMEM16A(ac) chloride channel at 2.85 A resolution | |||||||||
![]() | Anoctamin-1 | |||||||||
![]() | MEMBRANE PROTEIN / calcium-activated chloride channel / anoctamin-1 | |||||||||
機能・相同性 | ![]() glial cell projection elongation / trachea development / mucus secretion / intracellularly calcium-gated chloride channel activity / voltage-gated chloride channel activity / Stimuli-sensing channels / chloride transport / chloride channel activity / detection of temperature stimulus involved in sensory perception of pain / positive regulation of insulin secretion involved in cellular response to glucose stimulus ...glial cell projection elongation / trachea development / mucus secretion / intracellularly calcium-gated chloride channel activity / voltage-gated chloride channel activity / Stimuli-sensing channels / chloride transport / chloride channel activity / detection of temperature stimulus involved in sensory perception of pain / positive regulation of insulin secretion involved in cellular response to glucose stimulus / chloride channel complex / chloride transmembrane transport / regulation of membrane potential / cell projection / establishment of localization in cell / presynaptic membrane / cellular response to heat / phospholipase C-activating G protein-coupled receptor signaling pathway / apical plasma membrane / external side of plasma membrane / glutamatergic synapse / protein homodimerization activity / metal ion binding / identical protein 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: 2.85 Å | |||||||||
![]() | Lam, A.K.M. / Rutz, S. / Dutzler, R. | |||||||||
資金援助 | European Union, ![]()
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![]() | ![]() タイトル: Inhibition mechanism of the chloride channel TMEM16A by the pore blocker 1PBC. 著者: Andy K M Lam / Sonja Rutz / Raimund Dutzler / ![]() 要旨: TMEM16A, a calcium-activated chloride channel involved in multiple cellular processes, is a proposed target for diseases such as hypertension, asthma, and cystic fibrosis. Despite these therapeutic ...TMEM16A, a calcium-activated chloride channel involved in multiple cellular processes, is a proposed target for diseases such as hypertension, asthma, and cystic fibrosis. Despite these therapeutic promises, its pharmacology remains poorly understood. Here, we present a cryo-EM structure of TMEM16A in complex with the channel blocker 1PBC and a detailed functional analysis of its inhibition mechanism. A pocket located external to the neck region of the hourglass-shaped pore is responsible for open-channel block by 1PBC and presumably also by its structural analogs. The binding of the blocker stabilizes an open-like conformation of the channel that involves a rearrangement of several pore helices. The expansion of the outer pore enhances blocker sensitivity and enables 1PBC to bind at a site within the transmembrane electric field. Our results define the mechanism of inhibition and gating and will facilitate the design of new, potent TMEM16A modulators. | |||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 283.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 218.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 14753MC 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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リンク
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集合体
登録構造単位 | ![]()
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非結晶学的対称性 (NCS) | NCSドメイン:
NCSドメイン領域:
NCS oper: (Code: givenMatrix: (-0.999980068895, -0.0038673588816, -0.00499052590843), (0.0038441086586, -0.999981753054, 0.004660084584), (-0.00500845706608, 0.00464080757951, 0.99997668886) ...NCS oper: (Code: given Matrix: (-0.999980068895, -0.0038673588816, -0.00499052590843), ベクター: |
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要素
#1: タンパク質 | 分子量: 111058.992 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: 化合物 | ChemComp-CA / #3: 化合物 | 研究の焦点であるリガンドがあるか | Y | 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: mouse TMEM16A ac splice variant in complex with 1PBC and calcium タイプ: ORGANELLE OR CELLULAR COMPONENT / 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: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE-PROPANE |
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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 / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 1000 nm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 61 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
ソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.85 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 101813 / 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: 36.56 Å2 | ||||||||||||||||||||||||
拘束条件 |
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Refine LS restraints NCS | タイプ: NCS constraints / Rms dev position: 0.000706321995647 Å |