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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: 8ut1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| タイトル | Alpha7-nicotinic acetylcholine receptor bound to epibatidine | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
要素 | Neuronal acetylcholine receptor subunit alpha-7,Soluble cytochrome b562 fusion | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
キーワード | MEMBRANE PROTEIN / Ion channel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報sensory processing / synaptic transmission involved in micturition / response to acetylcholine / dendrite arborization / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine receptor activity / acetylcholine-gated channel complex / chloride channel regulator activity / regulation of amyloid fibril formation / acetylcholine-gated monoatomic cation-selective channel activity ...sensory processing / synaptic transmission involved in micturition / response to acetylcholine / dendrite arborization / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine receptor activity / acetylcholine-gated channel complex / chloride channel regulator activity / regulation of amyloid fibril formation / acetylcholine-gated monoatomic cation-selective channel activity / short-term memory / acetylcholine binding / dendritic spine organization / regulation of amyloid precursor protein catabolic process / acetylcholine receptor signaling pathway / positive regulation of amyloid-beta formation / negative regulation of amyloid-beta formation / response to amyloid-beta / positive regulation of protein metabolic process / modulation of excitatory postsynaptic potential / negative regulation of tumor necrosis factor production / plasma membrane raft / monoatomic ion channel activity / toxic substance binding / monoatomic ion transport / negative regulation of cytokine production involved in inflammatory response / positive regulation of long-term synaptic potentiation / positive regulation of excitatory postsynaptic potential / response to nicotine / negative regulation of canonical NF-kappaB signal transduction / excitatory postsynaptic potential / regulation of membrane potential / electron transport chain / synapse organization / cognition / calcium channel activity / memory / intracellular calcium ion homeostasis / positive regulation of angiogenesis / calcium ion transport / transmembrane signaling receptor activity / amyloid-beta binding / monoatomic ion transmembrane transport / chemical synaptic transmission / learning or memory / response to hypoxia / periplasmic space / electron transfer activity / positive regulation of ERK1 and ERK2 cascade / postsynaptic membrane / positive regulation of MAPK cascade / neuron projection / postsynapse / iron ion binding / heme binding / positive regulation of cell population proliferation / synapse / dendrite / endoplasmic reticulum membrane / signal transduction / protein homodimerization activity / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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: 2.3 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Burke, S.M. / Hibbs, R.E. / Noviello, C.M. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Cell / 年: 2024タイトル: Structural mechanisms of α7 nicotinic receptor allosteric modulation and activation. 著者: Sean M Burke / Mariia Avstrikova / Colleen M Noviello / Nuriya Mukhtasimova / Jean-Pierre Changeux / Ganesh A Thakur / Steven M Sine / Marco Cecchini / Ryan E Hibbs / ![]() 要旨: The α7 nicotinic acetylcholine receptor is a pentameric ligand-gated ion channel that plays an important role in cholinergic signaling throughout the nervous system. Its unique physiological ...The α7 nicotinic acetylcholine receptor is a pentameric ligand-gated ion channel that plays an important role in cholinergic signaling throughout the nervous system. Its unique physiological characteristics and implications in neurological disorders and inflammation make it a promising but challenging therapeutic target. Positive allosteric modulators overcome limitations of traditional α7 agonists, but their potentiation mechanisms remain unclear. Here, we present high-resolution structures of α7-modulator complexes, revealing partially overlapping binding sites but varying conformational states. Structure-guided functional and computational tests suggest that differences in modulator activity arise from the stable rotation of a channel gating residue out of the pore. We extend the study using a time-resolved cryoelectron microscopy (cryo-EM) approach to reveal asymmetric state transitions for this homomeric channel and also find that a modulator with allosteric agonist activity exploits a distinct channel-gating mechanism. These results define mechanisms of α7 allosteric modulation and activation with implications across the pentameric receptor superfamily. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 8ut1.cif.gz | 727.2 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8ut1.ent.gz | 619.1 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8ut1.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/ut/8ut1 ftp://data.pdbj.org/pub/pdb/validation_reports/ut/8ut1 | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 42526MC ![]() 8utbC ![]() 8uzjC ![]() 8v80C ![]() 8v82C ![]() 8v86C ![]() 8v88C ![]() 8v89C ![]() 8v8aC ![]() 8v8cC ![]() 8v8dC 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 F&H 検索 |
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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
-タンパク質 , 1種, 5分子 ABCDE
| #1: タンパク質 | 分子量: 67220.797 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) ![]() 遺伝子: CHRNA7, NACHRA7, cybC, CHRNA7 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P36544, UniProt: P0ABE7 |
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-糖 , 3種, 15分子 
| #2: 多糖 | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #3: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #5: 糖 | ChemComp-NAG / |
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-非ポリマー , 5種, 75分子 








| #4: 化合物 | ChemComp-CA / #6: 化合物 | ChemComp-POV / ( #7: 化合物 | ChemComp-9Z9 / ( #8: 化合物 | ChemComp-EPJ / #9: 水 | ChemComp-HOH / | |
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-詳細
| 研究の焦点であるリガンドがあるか | Y |
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| Has protein modification | Y |
-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: Alpha7-nicotinic acetylcholine receptor bound to epibatidine タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 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 |
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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: 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 FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 800 nm |
| 撮影 | 電子線照射量: 44 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 対称性 | 点対称性: C5 (5回回転対称) | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 133947 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
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ムービー
コントローラー
万見について




Homo sapiens (ヒト)

米国, 1件
引用





















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FIELD EMISSION GUN