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基本情報
登録情報 | データベース: PDB / ID: 8zfm | |||||||||
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タイトル | Caenorhabditis elegans ACR-23 in betaine bound state | |||||||||
![]() | Betaine receptor acr-23,Soluble cytochrome b562 | |||||||||
![]() | TRANSPORT PROTEIN / ion channel | |||||||||
機能・相同性 | ![]() Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / Neurotransmitter receptors and postsynaptic signal transmission / excitatory extracellular ligand-gated monoatomic ion channel activity / transmembrane transporter complex / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / electron transport chain / transmembrane signaling receptor activity / monoatomic ion transmembrane transport / chemical synaptic transmission ...Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / Neurotransmitter receptors and postsynaptic signal transmission / excitatory extracellular ligand-gated monoatomic ion channel activity / transmembrane transporter complex / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / electron transport chain / transmembrane signaling receptor activity / monoatomic ion transmembrane transport / chemical synaptic transmission / periplasmic space / electron transfer activity / postsynapse / neuron projection / iron ion binding / synapse / heme 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: 2.96 Å | |||||||||
![]() | Chen, Q.F. / Liu, F.L. / Li, T.Y. / Gong, H.H. / Guo, F. / Liu, S. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural insights into the molecular effects of the anthelmintics monepantel and betaine on the Caenorhabditis elegans acetylcholine receptor ACR-23. 著者: Fenglian Liu / Tianyu Li / Huihui Gong / Fei Tian / Yan Bai / Haowei Wang / Chonglin Yang / Yang Li / Fei Guo / Sheng Liu / Qingfeng Chen / ![]() 要旨: Anthelmintics are drugs used for controlling pathogenic helminths in animals and plants. The natural compound betaine and the recently developed synthetic compound monepantel are both anthelmintics ...Anthelmintics are drugs used for controlling pathogenic helminths in animals and plants. The natural compound betaine and the recently developed synthetic compound monepantel are both anthelmintics that target the acetylcholine receptor ACR-23 and its homologs in nematodes. Here, we present cryo-electron microscopy structures of ACR-23 in apo, betaine-bound, and betaine- and monepantel-bound states. We show that ACR-23 forms a homo-pentameric channel, similar to some other pentameric ligand-gated ion channels (pLGICs). While betaine molecules are bound to the classical neurotransmitter sites in the inter-subunit interfaces in the extracellular domain, monepantel molecules are bound to allosteric sites formed in the inter-subunit interfaces in the transmembrane domain of the receptor. Although the pore remains closed in betaine-bound state, monepantel binding results in an open channel by wedging into the cleft between the transmembrane domains of two neighboring subunits, which causes dilation of the ion conduction pore. By combining structural analyses with site-directed mutagenesis, electrophysiology and in vivo locomotion assays, we provide insights into the mechanism of action of the anthelmintics monepantel and betaine. | |||||||||
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 431.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 350.2 KB | 表示 | ![]() |
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その他 | ![]() |
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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
関連構造データ | ![]() 60065MC ![]() 8zfkC ![]() 8zflC 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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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 70582.281 Da / 分子数: 5 / 由来タイプ: 組換発現 詳細: Residues 387-500 correspond to the bril expression tag. Residues 599-603 and 610-612 correspond to flexible linkers, residues 604-609 correspond to the thrombin cleavage site, and residues ...詳細: Residues 387-500 correspond to the bril expression tag. Residues 599-603 and 610-612 correspond to flexible linkers, residues 604-609 correspond to the thrombin cleavage site, and residues 613-620 correspond to the strep ll tag. 由来: (組換発現) ![]() ![]() ![]() ![]() 細胞株: Sf9 / 遺伝子: acr-23, 5E130, F59B1.9, cybC / 細胞株 (発現宿主): Sf9 発現宿主: ![]() 参照: UniProt: G5EG88, 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-BET / #5: 水 | ChemComp-HOH / | 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: acetylcholine receptor like-23(ACR-23) / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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分子量 | 値: 0.067 MDa / 実験値: NO |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() 細胞: sf9 |
緩衝液 | pH: 8 |
試料 | 濃度: 4 mg/ml / 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: TFS KRIOS | ||||||||||||
電子銃 | 電子線源: ![]() | ||||||||||||
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 1200 nm | ||||||||||||
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解析
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CTF補正 |
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3次元再構成 | 解像度: 2.96 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 214366 / 対称性のタイプ: POINT | ||||||||||||
精密化 | 最高解像度: 2.96 Å |