8IY5

ETB-Gi complex bound to endothelin-1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 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

Cryo-EM structure of the endothelin-1-ET B -G i complex.

Sano, F.K.Akasaka, H.Shihoya, W.Nureki, O.

(2023) Elife 12

  • DOI: https://doi.org/10.7554/eLife.85821
  • Primary Citation of Related Structures:  
    8IY5, 8IY6

  • PubMed Abstract: 

    The endothelin ET B receptor is a promiscuous G-protein coupled receptor that is activated by vasoactive peptide endothelins. ET B signaling induces reactive astrocytes in the brain and vasorelaxation in vascular smooth muscle. Consequently, ET B agonists are expected to be drugs for neuroprotection and improved anti-tumor drug delivery. Here, we report the cryo-electron microscopy structure of the endothelin-1-ET B -G i complex at 2.8 Å resolution, with complex assembly stabilized by a newly established method. Comparisons with the inactive ET B receptor structures revealed how endothelin-1 activates the ET B receptor. The NPxxY motif, essential for G-protein activation, is not conserved in ET B , resulting in a unique structural change upon G-protein activation. Compared with other GPCR-G-protein complexes, ET B binds G i in the shallowest position, further expanding the diversity of G-protein binding modes. This structural information will facilitate the elucidation of G-protein activation and the rational design of ET B agonists.


  • Organizational Affiliation

    Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1354Homo sapiensMutation(s): 0 
Gene Names: GNAI1
Membrane Entity: Yes 
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PHAROS:  P63096
GTEx:  ENSG00000127955 
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UniProt GroupP63096
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1374Rattus rattusMutation(s): 0 
UniProt
Find proteins for P54311 (Rattus norvegicus)
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UniProt GroupP54311
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-268Bos taurusMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
scFv16D [auth E]260Mus musculusMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Endothelin type B receptorE [auth R]609Homo sapiensMutation(s): 0 
Membrane Entity: Yes 
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GTEx:  ENSG00000136160 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Endothelin-1F [auth L]21Homo sapiensMutation(s): 0 
Membrane Entity: Yes 
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Find proteins for P05305 (Homo sapiens)
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PHAROS:  P05305
GTEx:  ENSG00000078401 
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UniProt GroupP05305
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of Science (JSPS)Japan21H05037

Revision History  (Full details and data files)

  • Version 1.0: 2023-08-16
    Type: Initial release
  • Version 1.1: 2023-12-06
    Changes: Database references