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- PDB-9iiw: A local Cryo-EM structure of Bitter taste receptor TAS2R14 -

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Basic information

Entry
Database: PDB / ID: 9iiw
TitleA local Cryo-EM structure of Bitter taste receptor TAS2R14
ComponentsTaste receptor type 2 member 14
KeywordsMEMBRANE PROTEIN / GPCR
Function / homology
Function and homology information


bitter taste receptor activity / taste receptor activity / detection of chemical stimulus involved in sensory perception of bitter taste / Class C/3 (Metabotropic glutamate/pheromone receptors) / G protein-coupled receptor activity / Sensory perception of sweet, bitter, and umami (glutamate) taste / G alpha (i) signalling events / G protein-coupled receptor signaling pathway / membrane / plasma membrane
Similarity search - Function
Taste receptor type 2 / Taste receptor protein (TAS2R)
Similarity search - Domain/homology
: / Taste receptor type 2 member 14
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.15 Å
AuthorsYuan, Q. / Duan, J. / Tao, L. / Xu, E.H.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Cell Res / Year: 2024
Title: Bitter taste receptor TAS2R14 activation and G protein assembly by an intracellular agonist.
Authors: Lele Tao / Dongxue Wang / Qingning Yuan / Fenghui Zhao / Yu Zhang / Tianyuan Du / Shiyi Shen / H Eric Xu / Yi Li / Dehua Yang / Jia Duan /
History
DepositionJun 21, 2024Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Jul 24, 2024Provider: repository / Type: Initial release
Revision 1.1Oct 16, 2024Group: Data collection / Database references / Structure summary
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_entry_details
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID / _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
R: Taste receptor type 2 member 14
hetero molecules


Theoretical massNumber of molelcules
Total (without water)36,8433
Polymers36,2001
Non-polymers6432
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Taste receptor type 2 member 14 / T2R14 / Taste receptor family B member 1 / TRB1


Mass: 36200.070 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TAS2R14 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q9NYV8
#2: Chemical ChemComp-A1AEI / 4-methyl-N-[(2M)-2-(1H-tetrazol-5-yl)phenyl]-6-(trifluoromethyl)pyrimidin-2-amine


Mass: 321.261 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C13H10F3N7 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: local refinement of TAS2R14 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.04
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 18000 nm / Nominal defocus min: 8000 nm / Cs: 2.7 mm
Image recordingElectron dose: 15 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.15 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 354147 / Symmetry type: POINT

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