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-Structure paper
Title | Bitter taste TAS2R14 activation by intracellular tastants and cholesterol. |
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Journal, issue, pages | Nature, Vol. 631, Issue 8020, Page 459-466, Year 2024 |
Publish date | May 22, 2024 |
Authors | 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 / |
PubMed Abstract | 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. |
External links | Nature / PubMed:38776963 |
Methods | EM (single particle) |
Resolution | 2.77 - 3.3 Å |
Structure data | EMDB-38580, PDB-8xql: EMDB-38582, PDB-8xqn: EMDB-38583, PDB-8xqo: EMDB-38584, PDB-8xqp: EMDB-38586, PDB-8xqr: EMDB-38587, PDB-8xqs: EMDB-38588, PDB-8xqt: EMDB-39376, PDB-8yky: |
Chemicals | ChemComp-GOQ: ChemComp-CLR: ChemComp-FLF: PDB-1aei: |
Source |
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Keywords | SIGNALING PROTEIN / GPCR / Tas2R14 / miniGsg / GOQ / DNGi / Bitter receptor / Gi / Bitter Receptor. / Gustducin / GPCR Tas2R14 miniGsg FLF Bitter receptor / FLF / Ggustducin / 28.1 / TASTE RECEPTOR. |