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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Structure of the GPR88-Gi1 signaling complex bound to a synthetic ligand | |||||||||
![]() | Structure of the GPR88-Gi1 signaling complex | |||||||||
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機能・相同性 | ![]() motor learning / G protein-coupled photoreceptor activity / cellular response to light stimulus / plasma membrane => GO:0005886 / cytoskeletal motor activity / phototransduction / neuromuscular process controlling balance / neuronal action potential / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex ...motor learning / G protein-coupled photoreceptor activity / cellular response to light stimulus / plasma membrane => GO:0005886 / cytoskeletal motor activity / phototransduction / neuromuscular process controlling balance / neuronal action potential / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / regulation of mitotic spindle organization / cellular response to forskolin / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / locomotory behavior / Regulation of insulin secretion / G protein-coupled receptor binding / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / cilium / response to peptide hormone / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / GDP binding / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / retina development in camera-type eye / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / cell cortex / midbody / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / G protein-coupled receptor signaling pathway / cell division / lysosomal membrane / GTPase activity / centrosome / synapse / protein-containing complex binding / nucleolus / GTP binding / magnesium ion binding / signal transduction / extracellular exosome / nucleoplasm / membrane / nucleus / plasma membrane / cytosol / cytoplasm 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: 2.4 Å | |||||||||
![]() | Xu J / Chen G / Liu Z / Du Y | |||||||||
資金援助 | 1件
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![]() | ![]() タイトル: Activation and allosteric regulation of the orphan GPR88-Gi1 signaling complex. 著者: Geng Chen / Jun Xu / Asuka Inoue / Maximilian F Schmidt / Chen Bai / Qiuyuan Lu / Peter Gmeiner / Zheng Liu / Yang Du / ![]() ![]() ![]() ![]() 要旨: GPR88 is an orphan class A G-protein-coupled receptor that is highly expressed in the striatum and regulates diverse brain and behavioral functions. Here we present cryo-EM structures of the human ...GPR88 is an orphan class A G-protein-coupled receptor that is highly expressed in the striatum and regulates diverse brain and behavioral functions. Here we present cryo-EM structures of the human GPR88-Gi1 signaling complex with or without a synthetic agonist (1R, 2R)-2-PCCA. We show that (1R, 2R)-2-PCCA is an allosteric modulator binding to a herein identified pocket formed by the cytoplasmic ends of transmembrane segments 5, 6, and the extreme C terminus of the α5 helix of Gi1. We also identify an electron density in the extracellular orthosteric site that may represent a putative endogenous ligand of GPR88. These structures, together with mutagenesis studies and an inactive state model obtained from metadynamics simulations, reveal a unique activation mechanism for GPR88 with a set of distinctive structure features and a water-mediated polar network. Overall, our results provide a structural framework for understanding the ligand binding, activation and signaling mechanism of GPR88, and will facilitate the innovative drug discovery for neuropsychiatric disorders and for deorphanization of this receptor. | |||||||||
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マップデータ | ![]() | 64.7 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 17.6 KB 17.6 KB | 表示 表示 | ![]() |
画像 | ![]() | 137 KB | ||
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 | ![]() 7ejxMC ![]() 7wz4C 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
ファイル | ![]() | ||||||||||||||||||||
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注釈 | Structure of the GPR88-Gi1 signaling complex | ||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.83 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
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試料の構成要素
+全体 : GPR88-Gi1 signaling complex
+超分子 #1: GPR88-Gi1 signaling complex
+超分子 #2: GPR88-Gi1
+超分子 #3: scFv16
+分子 #1: Probable G-protein coupled receptor 88
+分子 #2: Guanine nucleotide-binding protein G(i) subunit alpha-1
+分子 #3: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+分子 #4: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+分子 #5: scFv16
+分子 #6: (1R,2R)-N-[(2S,3S)-2-azanyl-3-methyl-pentyl]-N-[4-(4-propylphenyl...
+分子 #7: CHOLESTEROL
+分子 #8: water
-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
緩衝液 | pH: 7.5 |
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糖包埋 | 材質: vitreous ice |
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 BIOQUANTUM (6k x 4k) 平均電子線量: 56.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 最大 デフォーカス(補正後): 2.0 µm / 最小 デフォーカス(補正後): 0.8 µm / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm 最大 デフォーカス(公称値): 1.4000000000000001 µm 最小 デフォーカス(公称値): 1.0 µm / 倍率(公称値): 105000 |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 2.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 988958 |
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初期 角度割当 | タイプ: RANDOM ASSIGNMENT |
最終 角度割当 | タイプ: MAXIMUM LIKELIHOOD |