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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: 6hin | ||||||||||||
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タイトル | Mouse serotonin 5-HT3 receptor, serotonin-bound, F conformation | ||||||||||||
![]() | 5-hydroxytryptamine receptor 3A | ||||||||||||
![]() | MEMBRANE PROTEIN / Ion channel / serotonin receptor / pentameric ligand-gated channel | ||||||||||||
機能・相同性 | ![]() Neurotransmitter receptors and postsynaptic signal transmission / serotonin-gated cation-selective signaling pathway / serotonin-activated cation-selective channel complex / serotonin-gated monoatomic cation channel activity / serotonin receptor signaling pathway / serotonin binding / inorganic cation transmembrane transport / cleavage furrow / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / postsynaptic membrane / identical protein binding 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: 4.1 Å | ||||||||||||
![]() | Polovinkin, L. / Neumann, E. / Schoehn, G. / Nury, H. | ||||||||||||
![]() | ![]() タイトル: Conformational transitions of the serotonin 5-HT receptor. 著者: Lucie Polovinkin / Ghérici Hassaine / Jonathan Perot / Emmanuelle Neumann / Anders A Jensen / Solène N Lefebvre / Pierre-Jean Corringer / Jacques Neyton / Christophe Chipot / Francois Dehez ...著者: Lucie Polovinkin / Ghérici Hassaine / Jonathan Perot / Emmanuelle Neumann / Anders A Jensen / Solène N Lefebvre / Pierre-Jean Corringer / Jacques Neyton / Christophe Chipot / Francois Dehez / Guy Schoehn / Hugues Nury / ![]() ![]() ![]() 要旨: The serotonin 5-HT receptor is a pentameric ligand-gated ion channel (pLGIC). It belongs to a large family of receptors that function as allosteric signal transducers across the plasma membrane; upon ...The serotonin 5-HT receptor is a pentameric ligand-gated ion channel (pLGIC). It belongs to a large family of receptors that function as allosteric signal transducers across the plasma membrane; upon binding of neurotransmitter molecules to extracellular sites, the receptors undergo complex conformational transitions that result in transient opening of a pore permeable to ions. 5-HT receptors are therapeutic targets for emesis and nausea, irritable bowel syndrome and depression. In spite of several reported pLGIC structures, no clear unifying view has emerged on the conformational transitions involved in channel gating. Here we report four cryo-electron microscopy structures of the full-length mouse 5-HT receptor in complex with the anti-emetic drug tropisetron, with serotonin, and with serotonin and a positive allosteric modulator, at resolutions ranging from 3.2 Å to 4.5 Å. The tropisetron-bound structure resembles those obtained with an inhibitory nanobody or without ligand. The other structures include an 'open' state and two ligand-bound states. We present computational insights into the dynamics of the structures, their pore hydration and free-energy profiles, and characterize movements at the gate level and cation accessibility in the pore. Together, these data deepen our understanding of the gating mechanism of pLGICs and capture ligand binding in unprecedented detail. | ||||||||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 319.7 KB | 表示 | ![]() |
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PDB形式 | ![]() | 260.6 KB | 表示 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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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
#1: タンパク質 | 分子量: 51906.031 Da / 分子数: 5 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #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-SRO / 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: 5-HT3 receptor, serotonin-bound / 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: ![]() ![]() |
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 |
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: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 60 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
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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対称性 | 点対称性: C5 (5回回転対称) |
3次元再構成 | 解像度: 4.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 10667 / 対称性のタイプ: POINT |