Receptor-bound Ghrelin conformation

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structure and dynamics of G protein-coupled receptor-bound ghrelin reveal the critical role of the octanoyl chain.

Ferre, G.Louet, M.Saurel, O.Delort, B.Czaplicki, G.M'Kadmi, C.Damian, M.Renault, P.Cantel, S.Gavara, L.Demange, P.Marie, J.Fehrentz, J.A.Floquet, N.Milon, A.Baneres, J.L.

(2019) Proc Natl Acad Sci U S A 116: 17525-17530

  • DOI: https://doi.org/10.1073/pnas.1905105116
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Ghrelin plays a central role in controlling major biological processes. As for other G protein-coupled receptor (GPCR) peptide agonists, the structure and dynamics of ghrelin bound to its receptor remain obscure. Using a combination of solution-state NMR and molecular modeling, we demonstrate that binding to the growth hormone secretagogue receptor is accompanied by a conformational change in ghrelin that structures its central region, involving the formation of a well-defined hydrophobic core. By comparing its acylated and nonacylated forms, we conclude that the ghrelin octanoyl chain is essential to form the hydrophobic core and promote access of ghrelin to the receptor ligand-binding pocket. The combination of coarse-grained molecular dynamics studies and NMR should prove useful in improving our mechanistic understanding of the complex conformational space explored by a natural peptide agonist when binding to its GPCR. Such information should also facilitate the design of new ghrelin receptor-selective drugs.

  • Organizational Affiliation

    Institut de Pharmacologie et Biologie Structurale, Université de Toulouse, CNRS, Université Paul Sabatier, 31000 Toulouse, France.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Appetite-regulating hormone19Homo sapiensMutation(s): 2 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBU3 (Homo sapiens)
Explore Q9UBU3 
Go to UniProtKB:  Q9UBU3
GTEx:  ENSG00000157017 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UBU3
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on FKZ

Download Ideal Coordinates CCD File 
B [auth A]octan-1-amine
C8 H19 N
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
French National Research AgencyFranceANR-17-CE11-0011-03

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-24
    Type: Initial release
  • Version 1.1: 2019-08-21
    Changes: Data collection, Database references
  • Version 1.2: 2019-08-28
    Changes: Data collection, Database references
  • Version 1.3: 2019-09-04
    Changes: Data collection, Database references
  • Version 1.4: 2023-06-14
    Changes: Database references, Other