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基本情報
| 登録情報 | データベース: PDB / ID: 9k6l | ||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of GPCR16-Gi2 complex | ||||||||||||||||||||||||
要素 |
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キーワード | SIGNALING PROTEIN/IMMUNE SYSTEM / Tas2R16 / GPCR / Gi2 / Salicin / SIGNALING PROTEIN / SIGNALING PROTEIN-IMMUNE SYSTEM complex | ||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報bitter taste receptor activity / negative regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / negative regulation of calcium ion-dependent exocytosis / detection of chemical stimulus involved in sensory perception of bitter taste / G protein-coupled adenosine receptor signaling pathway / negative regulation of adenylate cyclase activity / ganglioside catabolic process / positive regulation of neural precursor cell proliferation / negative regulation of synaptic transmission / Class C/3 (Metabotropic glutamate/pheromone receptors) ...bitter taste receptor activity / negative regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / negative regulation of calcium ion-dependent exocytosis / detection of chemical stimulus involved in sensory perception of bitter taste / G protein-coupled adenosine receptor signaling pathway / negative regulation of adenylate cyclase activity / ganglioside catabolic process / positive regulation of neural precursor cell proliferation / negative regulation of synaptic transmission / Class C/3 (Metabotropic glutamate/pheromone receptors) / oligosaccharide catabolic process / positive regulation of urine volume / gamma-aminobutyric acid signaling pathway / regulation of calcium ion transport / exo-alpha-sialidase / exo-alpha-sialidase activity / negative regulation of apoptotic signaling pathway / neuronal dense core vesicle / positive regulation of vascular associated smooth muscle cell proliferation / positive regulation of superoxide anion generation / Adenylate cyclase inhibitory pathway / response to nutrient / hippocampal mossy fiber to CA3 synapse / Regulation of insulin secretion / trans-Golgi network / G protein-coupled receptor binding / G protein-coupled receptor activity / G-protein beta/gamma-subunit complex binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / 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 / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / 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-protein beta-subunit binding / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / sensory perception of taste / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / retina development in camera-type eye / cell body / GTPase binding / fibroblast proliferation / Ca2+ pathway / midbody / 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 / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 / Ras protein signal transduction / positive regulation of ERK1 and ERK2 cascade / cell population proliferation / Extra-nuclear estrogen signaling / ciliary basal body / positive regulation of cell migration / G protein-coupled receptor signaling pathway / external side of plasma membrane / cell division / lysosomal membrane / GTPase activity / positive regulation of cell population proliferation / centrosome / synapse / dendrite / GTP binding / protein-containing complex binding / endoplasmic reticulum / signal transduction / extracellular exosome 類似検索 - 分子機能 | ||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() synthetic construct (人工物) | ||||||||||||||||||||||||
| 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: 2.77 Å | ||||||||||||||||||||||||
データ登録者 | Wang, X. / Zhou, C. / Wu, L.J. / Hua, T. / Liu, Z.J. | ||||||||||||||||||||||||
| 資金援助 | 1件
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引用 | ジャーナル: Cell Rep / 年: 2025タイトル: Structural basis of β-glucopyranoside salicin recognition by a human bitter taste GPCR. 著者: Xin Wang / Cui Zhou / Weizhen Ao / Lijie Wu / Yiran Wu / Weixiu Xu / Shenhui Liu / Qiwen Tan / Ling Wang / Fei Zhao / Junlin Liu / Yuan Pei / Suwen Zhao / Tian Hua / ![]() 要旨: The human perception of bitterness is mediated by type 2 taste receptors (TAS2Rs), which recognize a broad array of bitter substances with distinct chemical properties. TAS2R16 exhibits a pronounced ...The human perception of bitterness is mediated by type 2 taste receptors (TAS2Rs), which recognize a broad array of bitter substances with distinct chemical properties. TAS2R16 exhibits a pronounced selectivity for β-glucoside-moiety-containing compounds, such as salicin from willow bark. However, the molecular mechanism of moiety-specific recognition and receptor activation in TAS2R16 remains unclear. Here, we present cryoelectron microscopy structures of the salicin-activated human TAS2R16 complexed with gustducin and G and G proteins. The binding mode of salicin with TAS2R16 and the specific interactions of the β-D-glucopyranoside moiety are detailed. Together with molecular docking and mutagenesis data, this study uncovers the structural underpinnings of TAS2R16's group-specific recognition, receptor activation, and subsequent gustducin and G protein coupling. These findings advance our understanding of human bitter taste receptors and provide a foundation for structural modifications of bitter glycosides, opening potential therapeutic applications. | ||||||||||||||||||||||||
| 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 | 9k6l.cif.gz | 255.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9k6l.ent.gz | 187.6 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9k6l.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/k6/9k6l ftp://data.pdbj.org/pub/pdb/validation_reports/k6/9k6l | HTTPS FTP |
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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
-Guanine nucleotide-binding protein ... , 3種, 3分子 ABG
| #1: タンパク質 | 分子量: 40560.895 Da / 分子数: 1 / 変異: S47N, G204A, A327S / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: GNAI2, GNAI2B発現宿主: ![]() 参照: UniProt: P04899 |
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| #2: タンパク質 | 分子量: 39728.426 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 |
| #3: タンパク質 | 分子量: 7861.143 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 / タンパク質 / 糖 , 3種, 3分子 SR

| #4: 抗体 | 分子量: 28666.820 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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| #5: タンパク質 | 分子量: 113855.758 Da / 分子数: 1 / 変異: S133C / 由来タイプ: 組換発現 由来: (組換発現) ![]() Homo sapiens (ヒト), (組換発現) synthetic construct (人工物)遺伝子: nanA_2, SAMEA3353537_00427, TAS2R16 発現宿主: ![]() 参照: UniProt: A0A4J2AMT3, UniProt: Q9NYV7, exo-alpha-sialidase |
| #6: 糖 | ChemComp-SA0 / |
-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: tas2r16 with gi2 / タイプ: COMPLEX / Entity ID: #1-#5 / 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: BRIGHT 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): 1200 nm |
| 撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOCONTINUUM (6k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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| CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.77 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1064319 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
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万見について




Homo sapiens (ヒト)

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FIELD EMISSION GUN