8JMI

The cryo-EM structure of insect gustatory receptor Gr64a from Drosophila melanogaster in complex with maltose


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.60 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

Structural basis for sugar perception by Drosophila gustatory receptors.

Ma, D.Hu, M.Yang, X.Liu, Q.Ye, F.Cai, W.Wang, Y.Xu, X.Chang, S.Wang, R.Yang, W.Ye, S.Su, N.Fan, M.Xu, H.Guo, J.

(2024) Science : eadj2609-eadj2609

  • DOI: https://doi.org/10.1126/science.adj2609
  • Primary Citation of Related Structures:  
    8JM9, 8JMA, 8JME, 8JMH, 8JMI, 8X82, 8X83, 8X84

  • PubMed Abstract: 

    Insects rely on a family of seven-transmembrane proteins called gustatory receptors (GRs) to encode different taste modalities such as sweet and bitter. Here we report structures of Drosophila sweet taste receptors GR43a and GR64a in the apo and sugar-bound states. Both GRs form tetrameric sugar-gated cation channels, composed of one central pore domain (PD) and four peripheral ligand-binding domains (LBDs). Whereas GR43a is specifically activated by the monosaccharide fructose that binds to a narrow pocket in LBD, disaccharides sucrose and maltose selectively activate GR64a by binding to a larger and flatter pocket in LBD. Sugar binding to LBD induces local conformational changes, which are subsequently transferred to PD to cause channel opening. Our studies have revealed structural basis for sugar recognition and activation of GRs.


  • Organizational Affiliation

    College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gustatory receptor for sugar taste 64a
A, B, C, D
473Drosophila melanogasterMutation(s): 0 
Gene Names: Gr64aCG32261
Membrane Entity: Yes 
UniProt
Find proteins for P83293 (Drosophila melanogaster)
Explore P83293 
Go to UniProtKB:  P83293
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP83293
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-glucopyranose-(1-4)-beta-D-glucopyranose
E, F, G, H
2N/A
Glycosylation Resources
GlyTouCan:  G66120GK
GlyCosmos:  G66120GK
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2024-02-07 
  • Deposition Author(s): Ma, D., Guo, J.

Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China2020YFA0908501

Revision History  (Full details and data files)

  • Version 1.0: 2024-02-07
    Type: Initial release
  • Version 1.1: 2024-02-14
    Changes: Database references