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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: 9m1s | ||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of Itaconic acid bound OXGR1-Gq complex | ||||||||||||||||||||||||
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キーワード | MEMBRANE PROTEIN / Itaconic acid / ITA / OXGR1 / cryo-EM | ||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報Class A/1 (Rhodopsin-like receptors) / G protein-coupled receptor activity / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits ...Class A/1 (Rhodopsin-like receptors) / G protein-coupled receptor activity / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Glucagon-type ligand receptors / Sensory perception of sweet, bitter, and umami (glutamate) taste / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / G alpha (12/13) signalling events / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / sensory perception of taste / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / signaling receptor activity / retina development in camera-type eye / GTPase binding / fibroblast proliferation / Ca2+ pathway / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / innate immune response / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytoplasm / cytosol 類似検索 - 分子機能 | ||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() ![]() | ||||||||||||||||||||||||
| 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: 2.65 Å | ||||||||||||||||||||||||
データ登録者 | Liu, H. / Zhang, X. / Xu, H.E. | ||||||||||||||||||||||||
| 資金援助 | 中国, 1件
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引用 | ジャーナル: EMBO J / 年: 2026タイトル: Molecular architecture of OXGR1 reveals an evolutionary conserved mechanisms for metabolite surveillance. 著者: Xinyue Zhang / Yujie Lu / Xinheng He / Shimeng Guo / Changyao Li / Yu Wang / Yuan Gao / Juxia Yao / Qingning Yuan / Yinshan Tang / Jing Hu / Wen Hu / Zijuan Luo / Kai Wu / Yue Wang / Wanchao ...著者: Xinyue Zhang / Yujie Lu / Xinheng He / Shimeng Guo / Changyao Li / Yu Wang / Yuan Gao / Juxia Yao / Qingning Yuan / Yinshan Tang / Jing Hu / Wen Hu / Zijuan Luo / Kai Wu / Yue Wang / Wanchao Yin / Xin Xie / H Eric Xu / Heng Liu / ![]() 要旨: The ability of cells to sense and respond to metabolic signals is fundamental to life, yet the molecular mechanisms underlying metabolite surveillance remain incompletely understood. Here, we ...The ability of cells to sense and respond to metabolic signals is fundamental to life, yet the molecular mechanisms underlying metabolite surveillance remain incompletely understood. Here, we elucidate the structural basis of metabolite recognition by OXGR1, a G Protein-Coupled Receptor (GPCR) that senses key intermediates in the tricarboxylic acid (TCA) cycle. Using cryo-electron microscopy, we determined cryo-EM structures of OXGR1 bound to α-ketoglutarate (AKG), itaconate (ITA), and structurally related metabolites succinate (SUC) and maleate (MA). These structures reveal a positively charged binding pocket and an extensive hydrogen-bond network that mediate selective recognition of dicarboxylic acids. In addition, we identify a distinct arrangement of hydrophobic residues that modulates ligand potency and selectivity. Mutational analysis and molecular dynamics simulations further demonstrate that noncanonical micro-switch motifs, including FRY and NLxxY, are essential for ligand recognition and receptor activation. Comparative structural and evolutionary analyses indicate that these mechanisms are conserved across species, underscoring the critical role of OXGR1 in maintaining metabolic homeostasis. Together, our findings define a mechanistic framework for metabolite sensing by OXGR1 and provide a framework for therapeutic modulation of metabolic and inflammatory diseases. | ||||||||||||||||||||||||
| 履歴 |
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 9m1s.cif.gz | 261.1 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9m1s.ent.gz | 202.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9m1s.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/m1/9m1s ftp://data.pdbj.org/pub/pdb/validation_reports/m1/9m1s | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 63581MC ![]() 26xhC ![]() 9m1rC ![]() 9m1uC ![]() 9uxnC ![]() 9uxoC ![]() 9uxpC ![]() 9uxqC 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 F&H 検索 |
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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
-タンパク質 , 2種, 2分子 AR
| #1: タンパク質 | 分子量: 41710.289 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト)発現宿主: ![]() |
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| #6: タンパク質 | 分子量: 32733.980 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: OXGR1, GPR80, GPR99, P2RY15, P2Y15発現宿主: ![]() 参照: UniProt: Q96P68 |
-Guanine nucleotide-binding protein ... , 2種, 2分子 BG
| #2: タンパク質 | 分子量: 37198.656 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: GNB1発現宿主: ![]() 参照: UniProt: P62873 |
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| #3: タンパク質 | 分子量: 6261.229 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: GNG2発現宿主: ![]() 参照: UniProt: P59768 |
-抗体 , 2種, 2分子 NS
| #4: 抗体 | 分子量: 13798.362 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
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| #5: 抗体 | 分子量: 26293.299 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() |
-非ポリマー , 1種, 1分子 
| #7: 化合物 | ChemComp-ITN / |
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-詳細
| 研究の焦点であるリガンドがあるか | Y |
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| Has protein modification | Y |
-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: Itaconic acid bound OXGR1-Gq complex / タイプ: COMPLEX / Entity ID: #1-#6 / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 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: Talos Arctica / 画像提供: FEI Company |
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| 顕微鏡 | モデル: FEI TALOS ARCTICA |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: DARK FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm |
| 撮影 | 電子線照射量: 50 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: 1.20.1_4487 / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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| CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.65 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 405209 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 最高解像度: 2.65 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||
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万見について




Homo sapiens (ヒト)

中国, 1件
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FIELD EMISSION GUN