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基本情報
登録情報 | データベース: PDB / ID: 8xqn | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Structure of human class T GPCR TAS2R14-DNGi complex with Aristolochic acid A. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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![]() | SIGNALING PROTEIN / GPCR / DNGi / GOQ / TAS2R14 / Bitter receptor | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() bitter taste receptor activity / taste receptor activity / detection of chemical stimulus involved in sensory perception of bitter taste / ganglioside catabolic process / Class C/3 (Metabotropic glutamate/pheromone receptors) / oligosaccharide catabolic process / exo-alpha-sialidase / exo-alpha-sialidase activity / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex ...bitter taste receptor activity / taste receptor activity / detection of chemical stimulus involved in sensory perception of bitter taste / ganglioside catabolic process / Class C/3 (Metabotropic glutamate/pheromone receptors) / oligosaccharide catabolic process / exo-alpha-sialidase / exo-alpha-sialidase activity / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / response to prostaglandin E / adenylate cyclase regulator activity / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cellular response to forskolin / regulation of mitotic spindle organization / Regulation of insulin secretion / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor activity / G protein-coupled receptor binding / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / centriolar satellite / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / 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 / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / GDP binding / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADP signalling through P2Y purinoceptor 1 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / G protein activity / GTPase binding / Ca2+ pathway / midbody / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / cell cortex / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / 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 / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / ciliary basal body / G protein-coupled receptor signaling pathway / lysosomal membrane / cell division / intracellular membrane-bounded organelle / GTPase activity / synapse / centrosome / GTP binding / protein-containing complex binding / nucleolus / magnesium ion binding / Golgi apparatus / signal transduction / extracellular exosome / nucleoplasm 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
生物種 | ![]() ![]() ![]() 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: 3.05 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | Hu, X.L. / Wu, L.J. / Hua, T. / Liu, Z.J. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
資金援助 | 1件
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![]() | ![]() タイトル: Bitter taste TAS2R14 activation by intracellular tastants and cholesterol. 著者: Xiaolong Hu / Weizhen Ao / Mingxin Gao / Lijie Wu / Yuan Pei / Shenhui Liu / Yiran Wu / Fei Zhao / Qianqian Sun / Junlin Liu / Longquan Jiang / Xin Wang / Yan Li / Qiwen Tan / Jie Cheng / Fan ...著者: Xiaolong Hu / Weizhen Ao / Mingxin Gao / Lijie Wu / Yuan Pei / Shenhui Liu / Yiran Wu / Fei Zhao / Qianqian Sun / Junlin Liu / Longquan Jiang / Xin Wang / Yan Li / Qiwen Tan / Jie Cheng / Fan Yang / Chi Yang / Jinpeng Sun / Tian Hua / Zhi-Jie Liu / ![]() 要旨: Bitter taste receptors, particularly TAS2R14, play central roles in discerning a wide array of bitter substances, ranging from dietary components to pharmaceutical agents. TAS2R14 is also widely ...Bitter taste receptors, particularly TAS2R14, play central roles in discerning a wide array of bitter substances, ranging from dietary components to pharmaceutical agents. TAS2R14 is also widely expressed in extragustatory tissues, suggesting its extra roles in diverse physiological processes and potential therapeutic applications. Here we present cryogenic electron microscopy structures of TAS2R14 in complex with aristolochic acid, flufenamic acid and compound 28.1, coupling with different G-protein subtypes. Uniquely, a cholesterol molecule is observed occupying what is typically an orthosteric site in class A G-protein-coupled receptors. The three potent agonists bind, individually, to the intracellular pockets, suggesting a distinct activation mechanism for this receptor. Comprehensive structural analysis, combined with mutagenesis and molecular dynamic simulation studies, elucidate the broad-spectrum ligand recognition and activation of the receptor by means of intricate multiple ligand-binding sites. Our study also uncovers the specific coupling modes of TAS2R14 with gustducin and G proteins. These findings should be instrumental in advancing knowledge of bitter taste perception and its broader implications in sensory biology and drug discovery. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 258.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 188.9 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 555.7 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 577.9 KB | 表示 | |
XML形式データ | ![]() | 25.1 KB | 表示 | |
CIF形式データ | ![]() | 38.9 KB | 表示 | |
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 | ![]() 38582MC ![]() 8xqlC ![]() 8xqoC ![]() 8xqpC ![]() 8xqrC ![]() 8xqsC ![]() 8xqtC ![]() 8ykyC 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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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 ABC
#1: タンパク質 | 分子量: 42455.152 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P63096 |
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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) ![]() 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) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P59768 |
-抗体 / タンパク質 , 2種, 2分子 SR
#4: 抗体 | 分子量: 30668.211 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() |
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#5: タンパク質 | 分子量: 110840.023 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() ![]() 遺伝子: nanH, TAS2R14 発現宿主: ![]() ![]() 参照: UniProt: Q59310, UniProt: Q9NYV8, exo-alpha-sialidase |
-非ポリマー , 2種, 2分子 


#6: 化合物 | ChemComp-GOQ / |
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#7: 化合物 | ChemComp-CLR / |
-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: Structure of human class T GPCR TAS2R14-DNGi complex with Aristolochic acid A. タイプ: COMPLEX / Entity ID: #1-#5 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 |
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: 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): 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 BIOQUANTUM (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: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.05 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 450989 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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