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基本情報
登録情報 | データベース: PDB / ID: 7mlu | ||||||
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タイトル | Cryo-EM reveals partially and fully assembled native glycine receptors,homomeric pentamer | ||||||
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![]() | MEMBRANE PROTEIN / SIGNALING PROTEIN / glycine receptor / ion channel / homomeric pentamer | ||||||
機能・相同性 | ![]() Neurotransmitter receptors and postsynaptic signal transmission / taurine binding / negative regulation of transmission of nerve impulse / positive regulation of acrosome reaction / acrosome reaction / neuromuscular process controlling posture / inhibitory synapse / righting reflex / regulation of respiratory gaseous exchange by nervous system process / extracellularly glycine-gated chloride channel activity ...Neurotransmitter receptors and postsynaptic signal transmission / taurine binding / negative regulation of transmission of nerve impulse / positive regulation of acrosome reaction / acrosome reaction / neuromuscular process controlling posture / inhibitory synapse / righting reflex / regulation of respiratory gaseous exchange by nervous system process / extracellularly glycine-gated chloride channel activity / synaptic transmission, glycinergic / glycinergic synapse / inhibitory postsynaptic potential / cellular response to ethanol / adult walking behavior / cellular response to zinc ion / glycine binding / startle response / chloride channel complex / neuronal action potential / neuropeptide signaling pathway / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / visual perception / muscle contraction / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / cellular response to amino acid stimulus / transmembrane signaling receptor activity / postsynaptic membrane / perikaryon / external side of plasma membrane / intracellular membrane-bounded organelle / dendrite / zinc ion 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 | ||||||
![]() | Zhu, H. / Gouaux, E. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Architecture and assembly mechanism of native glycine receptors. 著者: Hongtao Zhu / Eric Gouaux / ![]() 要旨: Glycine receptors (GlyRs) are pentameric, 'Cys-loop' receptors that form chloride-permeable channels and mediate fast inhibitory signalling throughout the central nervous system. In the spinal cord ...Glycine receptors (GlyRs) are pentameric, 'Cys-loop' receptors that form chloride-permeable channels and mediate fast inhibitory signalling throughout the central nervous system. In the spinal cord and brainstem, GlyRs regulate locomotion and cause movement disorders when mutated. However, the stoichiometry of native GlyRs and the mechanism by which they are assembled remain unclear, despite extensive investigation. Here we report cryo-electron microscopy structures of native GlyRs from pig spinal cord and brainstem, revealing structural insights into heteromeric receptors and their predominant subunit stoichiometry of 4α:1β. Within the heteromeric pentamer, the β(+)-α(-) interface adopts a structure that is distinct from the α(+)-α(-) and α(+)-β(-) interfaces. Furthermore, the β-subunit contains a unique phenylalanine residue that resides within the pore and disrupts the canonical picrotoxin site. These results explain why inclusion of the β-subunit breaks receptor symmetry and alters ion channel pharmacology. We also find incomplete receptor complexes and, by elucidating their structures, reveal the architectures of partially assembled α-trimers and α-tetramers. | ||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 475.6 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 940.2 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 967.3 KB | 表示 | |
XML形式データ | ![]() | 78 KB | 表示 | |
CIF形式データ | ![]() | 107.4 KB | 表示 | |
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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: 抗体 | 分子量: 11743.124 Da / 分子数: 5 / 由来タイプ: 組換発現 詳細: The protein was cleaved from the mAb that was expressed in the hybridoma 由来: (組換発現) ![]() ![]() ![]() ![]() #2: 抗体 | 分子量: 12983.512 Da / 分子数: 5 / 由来タイプ: 組換発現 詳細: The protein was cleaved from the mAb that was expressed in the hybridoma 由来: (組換発現) ![]() ![]() ![]() ![]() #3: タンパク質 | 分子量: 52644.750 Da / 分子数: 5 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #4: 糖 | ChemComp-NAG / 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 |
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試料調製
構成要素 |
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分子量 | 値: 0.5 MDa / 実験値: YES | ||||||||||||||||||||||||||||
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由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||||||||||
緩衝液 | pH: 8 | ||||||||||||||||||||||||||||
試料 | 濃度: 0.05 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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / Cs: 2.7 mm |
撮影 | 電子線照射量: 28.2 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (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: 4.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 20660 / 対称性のタイプ: POINT |