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基本情報
登録情報 | データベース: PDB / ID: 9bp7 | |||||||||||||||||||||
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タイトル | Cryo-EM structure of human heteromeric Glycine Receptor alpha3S346E-beta in presence of glycine and 2,6-DTBP | |||||||||||||||||||||
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![]() | MEMBRANE PROTEIN / glycine receptor subunit alpha-3 / glycine receptor subunit beta / Green fluorescent protein | |||||||||||||||||||||
機能・相同性 | ![]() synaptic transmission, glycinergic / glycine-gated chloride ion channel activity / acrosome reaction / glycine-gated chloride channel complex / gamma-aminobutyric acid receptor clustering / Neurotransmitter receptors and postsynaptic signal transmission / postsynaptic specialization / extracellularly glycine-gated ion channel activity / righting reflex / extracellularly glycine-gated chloride channel activity ...synaptic transmission, glycinergic / glycine-gated chloride ion channel activity / acrosome reaction / glycine-gated chloride channel complex / gamma-aminobutyric acid receptor clustering / Neurotransmitter receptors and postsynaptic signal transmission / postsynaptic specialization / extracellularly glycine-gated ion channel activity / righting reflex / extracellularly glycine-gated chloride channel activity / glycinergic synapse / adult walking behavior / glycine binding / startle response / neuropeptide signaling pathway / monoatomic ion transport / visual perception / chloride transmembrane transport / bioluminescence / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / GABA-ergic synapse / generation of precursor metabolites and energy / protein homooligomerization / transmembrane signaling receptor activity / nervous system development / chemical synaptic transmission / perikaryon / postsynaptic membrane / intracellular membrane-bounded organelle / dendrite / protein-containing complex binding / metal ion binding / plasma membrane / cytoplasm 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: 3.6 Å | |||||||||||||||||||||
![]() | Liu, X. / Wang, W. | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Mechanism of human α3β GlyR regulation by intracellular M3/M4 loop phosphorylation and 2,6-di-tert-butylphenol interaction. 著者: Xiaofen Liu / Malgorzata Krezel / Weiwei Wang / ![]() 要旨: α3β glycine receptor (GlyR) is a subtype of GlyRs that belongs to the Cys-loop receptor superfamily. It is highly expressed in the spinal dorsal horn where sensory information is integrated. Under ...α3β glycine receptor (GlyR) is a subtype of GlyRs that belongs to the Cys-loop receptor superfamily. It is highly expressed in the spinal dorsal horn where sensory information is integrated. Under inflammatory conditions, the large unstructured intracellular M3/M4 loops of the α3 subunit are phosphorylated through the prostaglandin E2 (PGE) pathway, inhibiting ion conduction, and resulting in elevated pain sensation. A small molecule analgesic analog, 2,6-di-tert-butylphenol (2,6-DTBP) potentiates phosphorylated α3β GlyR through unclear mechanisms and relieves pain. Combining cryo-Electron Microscopy (cryo-EM) structures and single molecule Förster resonance energy transfer (smFRET) experiments, we show compaction of M3/M4 loop towards the ion conduction pore upon phosphorylation and further by 2,6-DTBP binding, which in turn modulates function through changing pore conformations and local electrostatics. We show that simultaneous interactions with the M3/M4 loop and the transmembrane domain (TM) is necessary for the potentiation of heteromeric α3β GlyR by 2,6-DTBP, while TM interaction alone is sufficient to potentiate homomeric α3 GlyR, explaining the mystery of why 2,6-DTBP potentiates only phosphorylated α3β GlyR. These findings show how post-translational modification of the unstructured intracellular M3/M4 loop may regulate Cys-loop receptor function, providing new perspectives in pain control and other pharmaceutical development targeting GlyRs and other Cys-loop receptors. | |||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 320.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 表示 | ![]() | |
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その他 | ![]() |
-検証レポート
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 | ![]() 44763MC ![]() 9boyC ![]() 9bozC 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: 48978.555 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #2: タンパク質 | | 分子量: 76584.531 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #3: 糖 | ChemComp-NAG / #4: 化合物 | 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: heteromeric glycine receptor alpha3S346E and beta with glycine in presence of glycine and 2,6-DTBP タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT | ||||||||||||||||||||
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分子量 | 値: 0.26 MDa / 実験値: NO | ||||||||||||||||||||
由来(天然) |
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由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||
緩衝液 | pH: 8 | ||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 6 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
試料支持 | グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||||||
急速凍結 | 凍結剤: ETHANE / 湿度: 100 % |
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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 / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1000 nm / アライメント法: BASIC |
試料ホルダ | 凍結剤: NITROGEN / 試料ホルダーモデル: GATAN LIQUID NITROGEN |
撮影 | 電子線照射量: 69.6 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 | 名称: PHENIX / バージョン: 1.21_5207: / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 22755 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 8DN2 Accession code: 8DN2 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||
拘束条件 |
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