8XQP

Structure of human class T GPCR TAS2R14-Gustducin complex with Aristolochic acid A.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Bitter taste TAS2R14 activation by intracellular tastants and cholesterol.

Hu, X.Ao, W.Gao, M.Wu, L.Pei, Y.Liu, S.Wu, Y.Zhao, F.Sun, Q.Liu, J.Jiang, L.Wang, X.Li, Y.Tan, Q.Cheng, J.Yang, F.Yang, C.Sun, J.Hua, T.Liu, Z.J.

(2024) Nature 631: 459-466

  • DOI: https://doi.org/10.1038/s41586-024-07569-9
  • Primary Citation of Related Structures:  
    8XQL, 8XQN, 8XQO, 8XQP, 8XQR, 8XQS, 8XQT, 8YKY

  • 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 1,2 . TAS2R14 is also widely expressed in extragustatory tissues, suggesting its extra roles in diverse physiological processes and potential therapeutic applications 3 . 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 i1 proteins. These findings should be instrumental in advancing knowledge of bitter taste perception and its broader implications in sensory biology and drug discovery.


  • Organizational Affiliation

    iHuman Institute, ShanghaiTech University, Shanghai, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(t) subunit alpha-3369Homo sapiensMutation(s): 0 
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PHAROS:  A8MTJ3
GTEx:  ENSG00000214415 
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UniProt GroupA8MTJ3
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1366Homo sapiensMutation(s): 0 
Gene Names: GNB1
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Find proteins for P62873 (Homo sapiens)
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PHAROS:  P62873
GTEx:  ENSG00000078369 
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UniProt GroupP62873
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-271Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Find proteins for P59768 (Homo sapiens)
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PHAROS:  P59768
GTEx:  ENSG00000186469 
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UniProt GroupP59768
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Exo-alpha-sialidase,Taste receptor type 2 member 14,LgBiTD [auth R]990Clostridium perfringensHomo sapienssynthetic construct
This entity is chimeric
Mutation(s): 0 
Gene Names: nanHTAS2R14
EC: 3.2.1.18
Membrane Entity: Yes 
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Find proteins for Q59310 (Clostridium perfringens)
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Go to UniProtKB:  Q59310
Find proteins for Q9NYV8 (Homo sapiens)
Explore Q9NYV8 
Go to UniProtKB:  Q9NYV8
PHAROS:  Q9NYV8
GTEx:  ENSG00000212127 
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UniProt GroupsQ9NYV8Q59310
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
scFv16E [auth S]286Homo sapiensMutation(s): 0 
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Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2024-07-10
    Type: Initial release
  • Version 1.1: 2024-07-24
    Changes: Data collection, Database references