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 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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

  • 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 receptor
A, B
535Homo sapiensEscherichia coli (strain K12)
This entity is chimeric
Mutation(s): 0 
Gene Names: PTH1R (PTHR, PTHR1), malE
Find proteins for Q03431 (Homo sapiens)
Go to Gene View: PTH1R
Go to UniProtKB:  Q03431
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEX9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download SDF File 
Download CCD File 
A, B
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.24 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.225 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 136.702α = 90.00
b = 182.326β = 90.00
c = 97.166γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
MAR345dtbdata collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-08-02
    Type: Refinement description, Source and taxonomy