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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Alpha7-nicotinic acetylcholine receptor bound to epibatidine and PNU-120596 | |||||||||
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![]() | ION CHANNEL / MEMBRANE PROTEIN / NICOTINIC RECEPTOR | |||||||||
機能・相同性 | ![]() sensory processing / dendrite arborization / response to acetylcholine / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine-gated channel complex / regulation of amyloid fibril formation / short-term memory / 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 / regulation of amyloid fibril formation / short-term memory / 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 / positive regulation of excitatory postsynaptic potential / response to amyloid-beta / 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 / electron transport chain / synapse organization / response to nicotine / calcium channel activity / memory / cognition / 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 / periplasmic space / 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 / synapse / heme binding / positive regulation of cell population proliferation / signal transduction / protein homodimerization activity / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.61 Å | |||||||||
![]() | Burke SM / Noviello CM / Hibbs RE | |||||||||
資金援助 | ![]()
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![]() | ![]() 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
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マップデータ | ![]() | 40.1 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 20.7 KB 20.7 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 9 KB | 表示 | ![]() |
画像 | ![]() | 62.8 KB | ||
Filedesc metadata | ![]() | 6.7 KB | ||
その他 | ![]() ![]() ![]() | 49.5 MB 49.8 MB 49.7 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 740.8 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 740.4 KB | 表示 | |
XML形式データ | ![]() | 16.2 KB | 表示 | |
CIF形式データ | ![]() | 21.2 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 | ![]() 8v82MC ![]() 8ut1C ![]() 8utbC ![]() 8uzjC ![]() 8v80C ![]() 8v86C ![]() 8v88C ![]() 8v89C ![]() 8v8aC ![]() 8v8cC ![]() 8v8dC M: このマップから作成された原子モデル 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
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
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ボクセルのサイズ | X=Y=Z: 1.079 Å | ||||||||||||||||||||
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-追加マップ: #1
ファイル | emd_43015_additional_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #2
ファイル | emd_43015_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_43015_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : Alpha7-nicotinic acetylcholine receptor bound to epibatidine and ...
全体 | 名称: Alpha7-nicotinic acetylcholine receptor bound to epibatidine and PNU-120596 |
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要素 |
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-超分子 #1: Alpha7-nicotinic acetylcholine receptor bound to epibatidine and ...
超分子 | 名称: Alpha7-nicotinic acetylcholine receptor bound to epibatidine and PNU-120596 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1 |
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由来(天然) | 生物種: ![]() |
-分子 #1: Neuronal acetylcholine receptor subunit alpha-7,Soluble cytochrom...
分子 | 名称: Neuronal acetylcholine receptor subunit alpha-7,Soluble cytochrome b562 タイプ: protein_or_peptide / ID: 1 詳細: 351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351- ...詳細: 351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage),351-353 (linker) 354-460 (SOLUBLE CYTOCHROME B562 FUSION) 551-558 (strep tag II) 559-571 (linker) 572-579 (strep tag II) 580-582 (linker) 583-599 (T2A self cleaving peptide post cleavage) コピー数: 5 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 67.220797 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: EFQRKLYKEL VKNYNPLERP VANDSQPLTV YFSLSLLQIM DVDEKNQVLT TNIWLQMSWT DHYLQWNVSE YPGVKTVRFP DGQIWKPDI LLYNSADERF DATFHTNVLV NSSGHCQYLP PGIFKSSCYI DVRWFPFDVQ HCKLKFGSWS YGGWSLDLQM Q EADISGYI ...文字列: EFQRKLYKEL VKNYNPLERP VANDSQPLTV YFSLSLLQIM DVDEKNQVLT TNIWLQMSWT DHYLQWNVSE YPGVKTVRFP DGQIWKPDI LLYNSADERF DATFHTNVLV NSSGHCQYLP PGIFKSSCYI DVRWFPFDVQ HCKLKFGSWS YGGWSLDLQM Q EADISGYI PNGEWDLVGI PGKRSERFYE CCKEPYPDVT FTVTMRRRTL YYGLNLLIPC VLISALALLV FLLPADSGEK IS LGITVLL SLTVFMLLVA EIMPATSDSV PLIAQYFAST MIIVGLSVVV TVIVLQYHHH DPDGGKMPKW TRVILLNWCA WFL RMKRPG EDKVRPACQH KQRRCSLACG RMACAGAMAD LEDNWETLND NLKVIEKADN AAQVKDALTK MRAAALDAQK ATPP KLEDK SPDSPEMKDF RHGFDILVGQ IDDALKLANE GKVKEAQAAA EQLKTTRNAY IQKYLSPTHD EHLLHGGQPP EGDPD LAKI LEEVRYIANR FRCQDESEAV CSEWKFAACV VDRLCLMAFS VFTIICTIGI LMSAPNFVEA VSKDFAWSHP QFEKGG GSG GGSGGSSAWS HPQFEKGSGE GRGSLLTCGD VEENPG UniProtKB: Neuronal acetylcholine receptor subunit alpha-7, Soluble cytochrome b562, Neuronal acetylcholine receptor subunit alpha-7 |
-分子 #4: CALCIUM ION
分子 | 名称: CALCIUM ION / タイプ: ligand / ID: 4 / コピー数: 5 / 式: CA |
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分子量 | 理論値: 40.078 Da |
-分子 #5: 2-acetamido-2-deoxy-beta-D-glucopyranose
分子 | 名称: 2-acetamido-2-deoxy-beta-D-glucopyranose / タイプ: ligand / ID: 5 / コピー数: 5 / 式: NAG |
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分子量 | 理論値: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-分子 #6: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(tri...
分子 | 名称: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate タイプ: ligand / ID: 6 / コピー数: 15 / 式: POV |
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分子量 | 理論値: 760.076 Da |
Chemical component information | ![]() ChemComp-POV: |
-分子 #7: (3beta,14beta,17beta,25R)-3-[4-methoxy-3-(methoxymethyl)butoxy]sp...
分子 | 名称: (3beta,14beta,17beta,25R)-3-[4-methoxy-3-(methoxymethyl)butoxy]spirost-5-en タイプ: ligand / ID: 7 / コピー数: 5 / 式: 9Z9 |
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分子量 | 理論値: 544.805 Da |
Chemical component information | ![]() ChemComp-9Z9: |
-分子 #8: EPIBATIDINE
分子 | 名称: EPIBATIDINE / タイプ: ligand / ID: 8 / コピー数: 5 / 式: EPJ |
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分子量 | 理論値: 208.687 Da |
Chemical component information | ![]() ChemComp-EPJ: |
-分子 #9: N-(5-Chloro-2,4-dimethoxyphenyl)-N'-(5-methyl-3-isoxazolyl)-urea
分子 | 名称: N-(5-Chloro-2,4-dimethoxyphenyl)-N'-(5-methyl-3-isoxazolyl)-urea タイプ: ligand / ID: 9 / コピー数: 5 / 式: I34 |
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分子量 | 理論値: 311.721 Da |
Chemical component information | ![]() ChemComp-I34: |
-分子 #10: water
分子 | 名称: water / タイプ: ligand / ID: 10 / コピー数: 45 / 式: HOH |
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分子量 | 理論値: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 6.5 mg/mL |
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緩衝液 | pH: 7.4 |
凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 44.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2.0 µm / 最小 デフォーカス(公称値): 0.8 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |