+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7koq | |||||||||
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タイトル | Alpha-7 nicotinic acetylcholine receptor bound to epibatidine in a desensitized state | |||||||||
要素 | Neuronal acetylcholine receptor subunit alpha-7,Soluble cytochrome b562 fusion | |||||||||
キーワード | MEMBRANE PROTEIN (膜タンパク質) / Cys-loop receptor | |||||||||
機能・相同性 | 機能・相同性情報 sensory processing / dendrite arborization / response to acetylcholine / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine-gated channel complex / short-term memory / regulation of amyloid fibril formation / positive regulation of CoA-transferase activity / acetylcholine receptor activity / dendritic spine organization ...sensory processing / dendrite arborization / response to acetylcholine / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine-gated channel complex / short-term memory / regulation of amyloid fibril formation / positive regulation of CoA-transferase activity / acetylcholine receptor activity / dendritic spine organization / chloride channel regulator activity / acetylcholine binding / regulation of amyloid precursor protein catabolic process / acetylcholine receptor signaling pathway / acetylcholine-gated monoatomic cation-selective channel activity / positive regulation of amyloid-beta formation / negative regulation of amyloid-beta formation / plasma membrane raft / modulation of excitatory postsynaptic potential / response to amyloid-beta / positive regulation of excitatory postsynaptic potential / negative regulation of tumor necrosis factor production / toxic substance binding / monoatomic ion transport / monoatomic ion transmembrane transport / positive regulation of protein metabolic process / positive regulation of long-term synaptic potentiation / 電子伝達系 / synapse organization / response to nicotine / calcium channel activity / 記憶 / 認識 / intracellular calcium ion homeostasis / positive regulation of angiogenesis / calcium ion transport / monoatomic ion channel activity / amyloid-beta binding / postsynapse / postsynaptic membrane / positive regulation of MAPK cascade / ペリプラズム / electron transfer activity / learning or memory / positive regulation of ERK1 and ERK2 cascade / response to hypoxia / neuron projection / iron ion binding / positive regulation of protein phosphorylation / シナプス / heme binding / positive regulation of cell population proliferation / シグナル伝達 / protein homodimerization activity / 生体膜 / 細胞膜 類似検索 - 分子機能 | |||||||||
生物種 | Homo sapiens (ヒト) Escherichia coli (大腸菌) | |||||||||
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: 3.6 Å | |||||||||
データ登録者 | Noviello, C.M. / Hibbs, R.E. / Gharpure, A. / Mukhtasimova, N. / Cabuco, R. / Baxter, L. / Borek, D. / Sine, S. | |||||||||
資金援助 | 米国, 2件
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引用 | ジャーナル: Cell / 年: 2021 タイトル: Structure and gating mechanism of the α7 nicotinic acetylcholine receptor. 著者: Colleen M Noviello / Anant Gharpure / Nuriya Mukhtasimova / Rico Cabuco / Leah Baxter / Dominika Borek / Steven M Sine / Ryan E Hibbs / 要旨: The α7 nicotinic acetylcholine receptor plays critical roles in the central nervous system and in the cholinergic inflammatory pathway. This ligand-gated ion channel assembles as a homopentamer, is ...The α7 nicotinic acetylcholine receptor plays critical roles in the central nervous system and in the cholinergic inflammatory pathway. This ligand-gated ion channel assembles as a homopentamer, is exceptionally permeable to Ca, and desensitizes faster than any other Cys-loop receptor. The α7 receptor has served as a prototype for the Cys-loop superfamily yet has proven refractory to structural analysis. We present cryo-EM structures of the human α7 nicotinic receptor in a lipidic environment in resting, activated, and desensitized states, illuminating the principal steps in the gating cycle. The structures also reveal elements that contribute to its function, including a C-terminal latch that is permissive for channel opening, and an anionic ring in the extracellular vestibule that contributes to its high conductance and calcium permeability. Comparisons among the α7 structures provide a foundation for mapping the gating cycle and reveal divergence in gating mechanisms in the Cys-loop receptor superfamily. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7koq.cif.gz | 664 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7koq.ent.gz | 573.4 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7koq.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/ko/7koq ftp://data.pdbj.org/pub/pdb/validation_reports/ko/7koq | HTTPS FTP |
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-関連構造データ
-リンク
-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: 63832.293 Da / 分子数: 5 / 由来タイプ: 組換発現 由来: (組換発現) Homo sapiens (ヒト), (組換発現) Escherichia coli (大腸菌) 遺伝子: CHRNA7, NACHRA7, cybC / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P36544, UniProt: P0ABE7 #2: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #3: 糖 | ChemComp-NAG / #4: 化合物 | ChemComp-EPJ / #5: 化合物 | ChemComp-CA / 研究の焦点であるリガンドがあるか | N | |
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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 |
-試料調製
構成要素 | 名称: alpha 7 nicotinic receptor in complex with the agonist epibatidine タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
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: 7.4 |
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 |
-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 FIELDBright-field microscopy |
撮影 | 電子線照射量: 70 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19_4080: / 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: 3.6 Å / 解像度の算出法: OTHER / 粒子像の数: 1790185 / 詳細: Resolve CryoEM Density Modification, FSC=0.5 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 最高解像度: 3.6 Å | ||||||||||||||||||||||||
拘束条件 |
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