5XPR

Human endothelin receptor type-B in complex with antagonist bosentan


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray structures of endothelin ETB receptor bound to clinical antagonist bosentan and its analog

Shihoya, W.Nishizawa, T.Yamashita, K.Inoue, A.Hirata, K.Kadji, F.M.N.Okuta, A.Tani, K.Aoki, J.Fujiyoshi, Y.Doi, T.Nureki, O.

(2017) Nat. Struct. Mol. Biol. 24: 758-764

  • DOI: 10.1038/nsmb.3450
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Endothelin receptors (ETRs) have crucial roles in vascular control and are targets for drugs designed to treat circulatory-system diseases and cancer progression. The nonpeptide dual-ETR antagonist bosentan is the first oral drug approved to treat pu ...

    Endothelin receptors (ETRs) have crucial roles in vascular control and are targets for drugs designed to treat circulatory-system diseases and cancer progression. The nonpeptide dual-ETR antagonist bosentan is the first oral drug approved to treat pulmonary arterial hypertension. Here we report crystal structures of human endothelin ETB receptor bound to bosentan and to the ETB-selective analog K-8794, at 3.6-Å and 2.2-Å resolution, respectively. The K-8794-bound structure reveals the detailed water-mediated hydrogen-bonding network at the transmembrane core, which could account for the weak negative allosteric modulation of ETB by Na+ ions. The bosentan-bound structure reveals detailed interactions with ETB, which are probably conserved in the ETA receptor. A comparison of the two structures shows unexpected similarity between antagonist and agonist binding. Despite this similarity, bosentan sterically prevents the inward movement of transmembrane helix 6 (TM6), and thus exerts its antagonistic activity. These structural insights will facilitate the rational design of new ETR-targeting drugs.


    Organizational Affiliation

    Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endothelin B receptor,Endolysin,Endothelin B receptor
A
464Homo sapiensEnterobacteria phage T4
This entity is chimeric
Mutation(s): 9 
Gene Names: EDNRB (ETRB), E
EC: 3.2.1.17
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
endothelin ETB receptor with bound endothelin-1
Find proteins for P24530 (Homo sapiens)
Go to Gene View: EDNRB
Go to UniProtKB:  P24530
Find proteins for P00720 (Enterobacteria phage T4)
Go to UniProtKB:  P00720
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
K86
Query on K86

Download SDF File 
Download CCD File 
A
4-tert-butyl-N-[6-(2-hydroxyethyloxy)-5-(2-methoxyphenoxy)-2-pyrimidin-2-yl-pyrimidin-4-yl]benzenesulfonamide
C27 H29 N5 O6 S
GJPICJJJRGTNOD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.248 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 74.720α = 90.00
b = 74.720β = 90.00
c = 218.870γ = 120.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Structure summary