8JBH

Substance P bound to active human neurokinin 3 receptor in complex with Gq


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

Structural insights into neurokinin 3 receptor activation by endogenous and analogue peptide agonists.

Sun, W.Yang, F.Zhang, H.Yuan, Q.Ling, S.Wang, Y.Lv, P.Li, Z.Luo, Y.Liu, D.Yin, W.Shi, P.Xu, H.E.Tian, C.

(2023) Cell Discov 9: 66-66

  • DOI: https://doi.org/10.1038/s41421-023-00564-w
  • Primary Citation of Related Structures:  
    8JBF, 8JBG, 8JBH

  • PubMed Abstract: 

    Neurokinin 3 receptor (NK3R) is a tachykinin receptor essential for the hypothalamic-pituitary-gonadal axis. The endogenous peptide agonist neurokinin B (NKB) preferentially activates NK3R, while substance P (SP) binds preferentially to NK1R. In addition, the SP analogue senktide more potently activates NK3R than NKB and SP. However, the mechanisms of preferential binding of peptide and NK3R activation remain elusive. Herein, we determined the cryogenic electron microscopy (cryo-EM) structures of the NK3R-G q complex bound to NKB, SP and senktide. The three NK3R-G q /peptide complexes utilize a class of noncanonical receptor activation mechanisms. Combining the structural analysis and functional assay illustrated that the consensus C-termini of the three peptide agonists share a conserved binding mode to NK3R, while the divergent N-termini of the peptides confer the preferential binding of the agonist to NK3R. In addition, the specific interactions between the N-terminus of senktide and the N-terminus and extracellular loops (ECL2 and ECL3) of NK3R lead to the improved activation displayed by senktide compared to SP and NKB. These findings pave the way to understand tachykinin receptor subtype selectivity and provide ideas to rationally develop drugs targeting NK3R.


  • Organizational Affiliation

    State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NK3R-pFastbac1A [auth B]1,428Homo sapiensMutation(s): 0 
Gene Names: TACR3NK3RTAC3R
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B [auth D]377Rattus norvegicusMutation(s): 0 
Gene Names: Gnb1
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UniProt GroupP54311
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
ScFv16 nanobodyC [auth E]304Mus musculoidesMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2D [auth G]71Bos taurusMutation(s): 0 
Gene Names: GNG2
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
peptide from Protachykinin-1E [auth A]11Homo sapiensMutation(s): 0 
Gene Names: TAC1NKANKNATAC2
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Find proteins for P20366 (Homo sapiens)
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GTEx:  ENSG00000006128 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein Gq subunit alpha (G324)F [auth C]361Homo sapiensMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other governmentChina--

Revision History  (Full details and data files)

  • Version 1.0: 2024-02-07
    Type: Initial release