7V9L

Cryo-EM structure of the SV1-Gs complex.


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

Constitutive signal bias mediated by the human GHRHR splice variant 1.

Cong, Z.Zhou, F.Zhang, C.Zou, X.Zhang, H.Wang, Y.Zhou, Q.Cai, X.Liu, Q.Li, J.Shao, L.Mao, C.Wang, X.Wu, J.Xia, T.Zhao, L.H.Jiang, H.Zhang, Y.Xu, H.E.Cheng, X.Yang, D.Wang, M.W.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: https://doi.org/10.1073/pnas.2106606118
  • Primary Citation of Related Structures:  
    7V9L, 7V9M

  • PubMed Abstract: 

    Alternative splicing of G protein-coupled receptors has been observed, but their functions are largely unknown. Here, we report that a splice variant (SV1) of the human growth hormone-releasing hormone receptor (GHRHR) is capable of transducing biased signal. Differing only at the receptor N terminus, GHRHR predominantly activates G s while SV1 selectively couples to β-arrestins. Based on the cryogenic electron microscopy structures of SV1 in the apo state or GHRH-bound state in complex with the G s protein, molecular dynamics simulations reveal that the N termini of GHRHR and SV1 differentiate the downstream signaling pathways, G s versus β-arrestins. As suggested by mutagenesis and functional studies, it appears that GHRH-elicited signal bias toward β-arrestin recruitment is constitutively mediated by SV1. The level of SV1 expression in prostate cancer cells is also positively correlated with ERK1/2 phosphorylation but negatively correlated with cAMP response. Our findings imply that constitutive signal bias may be a mechanism that ensures cancer cell proliferation.


  • Organizational Affiliation

    Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short360Homo sapiensMutation(s): 0 
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens)
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PHAROS:  P63096
GTEx:  ENSG00000127955 
Find proteins for P63092 (Homo sapiens)
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PHAROS:  P63092
GTEx:  ENSG00000087460 
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UniProt GroupsP63096P63092
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
GHRH receptor splice variant 1,GHRH receptor splice variant 1,GHRH receptor splice variant 1,SV1B [auth R]522Homo sapiensMutation(s): 0 
Gene Names: GHRHRhCG_37325
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HB45 (Homo sapiens)
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GTEx:  ENSG00000106128 
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UniProt GroupQ9HB45
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2C [auth Y]71Bos taurusMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Nanobody 35D [auth N]140synthetic constructMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1E [auth B]371Rattus norvegicusMutation(s): 0 
Gene Names: Gnb1
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Find proteins for P54311 (Rattus norvegicus)
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UniProt GroupP54311
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  • Reference Sequence
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


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China81872915
National Natural Science Foundation of China (NSFC)China82073904
National Natural Science Foundation of China (NSFC)China81773792
National Natural Science Foundation of China (NSFC)China81973373
National Natural Science Foundation of China (NSFC)China21704064

Revision History  (Full details and data files)

  • Version 1.0: 2022-04-06
    Type: Initial release
  • Version 1.1: 2022-05-04
    Changes: Database references