5NJ6

Crystal structure of a thermostabilised human protease-activated receptor-2 (PAR2) in ternary complex with Fab3949 and AZ7188 at 4.0 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.263 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insight into allosteric modulation of protease-activated receptor 2.

Cheng, R.K.Y.Fiez-Vandal, C.Schlenker, O.Edman, K.Aggeler, B.Brown, D.G.Brown, G.A.Cooke, R.M.Dumelin, C.E.Dore, A.S.Geschwindner, S.Grebner, C.Hermansson, N.O.Jazayeri, A.Johansson, P.Leong, L.Prihandoko, R.Rappas, M.Soutter, H.Snijder, A.Sundstrom, L.Tehan, B.Thornton, P.Troast, D.Wiggin, G.Zhukov, A.Marshall, F.H.Dekker, N.

(2017) Nature 545: 112-115

  • DOI: 10.1038/nature22309
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protease-activated receptors (PARs) are a family of G-protein-coupled receptors (GPCRs) that are irreversibly activated by proteolytic cleavage of the N terminus, which unmasks a tethered peptide ligand that binds and activates the transmembrane rece ...

    Protease-activated receptors (PARs) are a family of G-protein-coupled receptors (GPCRs) that are irreversibly activated by proteolytic cleavage of the N terminus, which unmasks a tethered peptide ligand that binds and activates the transmembrane receptor domain, eliciting a cellular cascade in response to inflammatory signals and other stimuli. PARs are implicated in a wide range of diseases, such as cancer and inflammation. PARs have been the subject of major pharmaceutical research efforts but the discovery of small-molecule antagonists that effectively bind them has proved challenging. The only marketed drug targeting a PAR is vorapaxar, a selective antagonist of PAR1 used to prevent thrombosis. The structure of PAR1 in complex with vorapaxar has been reported previously. Despite sequence homology across the PAR isoforms, discovery of PAR2 antagonists has been less successful, although GB88 has been described as a weak antagonist. Here we report crystal structures of PAR2 in complex with two distinct antagonists and a blocking antibody. The antagonist AZ8838 binds in a fully occluded pocket near the extracellular surface. Functional and binding studies reveal that AZ8838 exhibits slow binding kinetics, which is an attractive feature for a PAR2 antagonist competing against a tethered ligand. Antagonist AZ3451 binds to a remote allosteric site outside the helical bundle. We propose that antagonist binding prevents structural rearrangements required for receptor activation and signalling. We also show that a blocking antibody antigen-binding fragment binds to the extracellular surface of PAR2, preventing access of the tethered ligand to the peptide-binding site. These structures provide a basis for the development of selective PAR2 antagonists for a range of therapeutic uses.


    Organizational Affiliation

    Heptares Therapeutics Ltd, BioPark, Broadwater Road, Welwyn Garden City, Hertfordshire AL7 3AX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proteinase-activated receptor 2,Soluble cytochrome b562,Proteinase-activated receptor 2
A
437Escherichia coliHomo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: cybC, F2RL1 (GPR11, PAR2)
Find proteins for P0ABE7 (Escherichia coli)
Go to UniProtKB:  P0ABE7
Find proteins for P55085 (Homo sapiens)
Go to Gene View: F2RL1
Go to UniProtKB:  P55085
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab3949 H
H
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fab3949 L
L
213N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.263 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 164.144α = 90.00
b = 38.520β = 90.00
c = 159.660γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
BUSTERrefinement
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2017-05-03
    Type: Initial release
  • Version 1.1: 2017-05-17
    Type: Database references