3L2J

Dimeric structure of the ligand-free extracellular domain of the human parathyroid hormone receptor (PTH1R)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.24 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 

wwPDB Validation 3D Report Full Report



Literature

Dimeric arrangement of the parathyroid hormone receptor and a structural mechanism for ligand-induced dissociation.

Pioszak, A.A.Harikumar, K.G.Parker, N.R.Miller, L.J.Xu, H.E.

(2010) J Biol Chem 285: 12435-12444

  • DOI: 10.1074/jbc.M109.093138
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The parathyroid hormone receptor (PTH1R) is a class B G protein-coupled receptor that is activated by parathyroid hormone (PTH) and PTH-related protein (PTHrP). Little is known about the oligomeric state of the receptor and its regulation by hormone. ...

    The parathyroid hormone receptor (PTH1R) is a class B G protein-coupled receptor that is activated by parathyroid hormone (PTH) and PTH-related protein (PTHrP). Little is known about the oligomeric state of the receptor and its regulation by hormone. The crystal structure of the ligand-free PTH1R extracellular domain (ECD) reveals an unexpected dimer in which the C-terminal segment of both ECD protomers forms an alpha-helix that mimics PTH/PTHrP by occupying the peptide binding groove of the opposing protomer. ECD-mediated oligomerization of intact PTH1R was confirmed in living cells by bioluminescence and fluorescence resonance energy transfer experiments. As predicted by the structure, PTH binding disrupted receptor oligomerization. A receptor rendered monomeric by mutations in the ECD retained wild-type PTH binding and cAMP signaling ability. Our results are consistent with the hypothesis that PTH1R forms constitutive dimers that are dissociated by ligand binding and that monomeric PTH1R is capable of activating G protein.


    Organizational Affiliation

    Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, Michigan 49503, USA. augie.pioszak@vai.org



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fusion protein of Maltose-binding periplasmic protein and Parathyroid hormone/parathyroid hormone-related peptide receptorA, B535Escherichia coli K-12Homo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: b4034JW3994malEPTHR1
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Explore P0AEX9 
Go to UniProtKB:  P0AEX9
Find proteins for Q03431 (Homo sapiens)
Explore Q03431 
Go to UniProtKB:  Q03431
NIH Common Fund Data Resources
PHAROS  Q03431
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Oligosaccharides
Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose
C, D
2 N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.24 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.702α = 90
b = 182.326β = 90
c = 97.166γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345dtbdata collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-08-02
    Changes: Refinement description, Source and taxonomy
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary