7YAC

Paltusotine-bound SSTR2-Gi complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.24 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

Prospect of acromegaly therapy: molecular mechanism of clinical drugs octreotide and paltusotine.

Zhao, J.Fu, H.Yu, J.Hong, W.Tian, X.Qi, J.Sun, S.Zhao, C.Wu, C.Xu, Z.Cheng, L.Chai, R.Yan, W.Wei, X.Shao, Z.

(2023) Nat Commun 14: 962-962

  • DOI: https://doi.org/10.1038/s41467-023-36673-z
  • Primary Citation of Related Structures:  
    7YAC, 7YAE

  • PubMed Abstract: 

    Somatostatin receptor 2 (SSTR2) is highly expressed in neuroendocrine tumors and represents as a therapeutic target. Several peptide analogs mimicking the endogenous ligand somatostatin are available for clinical use, but poor therapeutic effects occur in a subset of patients, which may be correlated with subtype selectivity or cell surface expression. Here, we clarify the signal bias profiles of the first-generation peptide drug octreotide and a new-generation small molecule paltusotine by evaluating their pharmacological characteristics. We then perform cryo-electron microscopy analysis of SSTR2-Gi complexes to determine how the drugs activate SSTR2 in a selective manner. In this work, we decipher the mechanism of ligand recognition, subtype selectivity and signal bias property of SSTR2 sensing octreotide and paltusotine, which may aid in designing therapeutic drugs with specific pharmacological profiles against neuroendocrine tumors.


  • Organizational Affiliation

    Division of Nephrology and Kidney Research Institute, Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1354Homo sapiensMutation(s): 4 
Gene Names: GNAI1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens)
Explore P63096 
Go to UniProtKB:  P63096
PHAROS:  P63096
GTEx:  ENSG00000127955 
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UniProt GroupP63096
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1350Homo sapiensMutation(s): 0 
Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens)
Explore P62873 
Go to UniProtKB:  P62873
PHAROS:  P62873
GTEx:  ENSG00000078369 
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UniProt GroupP62873
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-271Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens)
Explore P59768 
Go to UniProtKB:  P59768
PHAROS:  P59768
GTEx:  ENSG00000186469 
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UniProt GroupP59768
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Somatostatin receptor type 2D [auth E]332Homo sapiensMutation(s): 0 
Gene Names: SSTR2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P30874 (Homo sapiens)
Explore P30874 
Go to UniProtKB:  P30874
GTEx:  ENSG00000180616 
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UniProt GroupP30874
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
scFv16E [auth S]259Mus musculusMutation(s): 0 
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
IUD (Subject of Investigation/LOI)
Query on IUD

Download Ideal Coordinates CCD File 
F [auth E]Paltusotine
C27 H22 F2 N4 O
GHILNKWBALQPDP-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.24 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2023-04-19
    Type: Initial release
  • Version 1.1: 2023-09-27
    Changes: Data collection, Derived calculations, Structure summary