4ZJ8

Structures of the human OX1 orexin receptor bound to selective and dual antagonists


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.751 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and ligand-binding mechanism of the human OX1 and OX2 orexin receptors.

Yin, J.Babaoglu, K.Brautigam, C.A.Clark, L.Shao, Z.Scheuermann, T.H.Harrell, C.M.Gotter, A.L.Roecker, A.J.Winrow, C.J.Renger, J.J.Coleman, P.J.Rosenbaum, D.M.

(2016) Nat.Struct.Mol.Biol. 23: 293-299

  • DOI: 10.1038/nsmb.3183
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The orexin (also known as hypocretin) G protein-coupled receptors (GPCRs) regulate sleep and other behavioral functions in mammals, and are therapeutic targets for sleep and wake disorders. The human receptors hOX1R and hOX2R, which are 64% identical ...

    The orexin (also known as hypocretin) G protein-coupled receptors (GPCRs) regulate sleep and other behavioral functions in mammals, and are therapeutic targets for sleep and wake disorders. The human receptors hOX1R and hOX2R, which are 64% identical in sequence, have overlapping but distinct physiological functions and potential therapeutic profiles. We determined structures of hOX1R bound to the OX1R-selective antagonist SB-674042 and the dual antagonist suvorexant at 2.8-Å and 2.75-Å resolution, respectively, and used molecular modeling to illuminate mechanisms of antagonist subtype selectivity between hOX1R and hOX2R. The hOX1R structures also reveal a conserved amphipathic α-helix, in the extracellular N-terminal region, that interacts with orexin-A and is essential for high-potency neuropeptide activation at both receptors. The orexin-receptor crystal structures are valuable tools for the design and development of selective orexin-receptor antagonists and agonists.


    Organizational Affiliation

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
human OX1R fusion protein to P.abysii glycogen synthase
A
553Pyrococcus abyssi (strain GE5 / Orsay)Homo sapiens
This entity is chimeric
Mutation(s): 1 
Gene Names: HCRTR1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
OX1 orexin receptor with bound suvorexant
Find proteins for Q9V2J8 (Pyrococcus abyssi (strain GE5 / Orsay))
Go to UniProtKB:  Q9V2J8
Find proteins for O43613 (Homo sapiens)
Go to Gene View: HCRTR1
Go to UniProtKB:  O43613
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OLA
Query on OLA

Download SDF File 
Download CCD File 
A
OLEIC ACID
C18 H34 O2
ZQPPMHVWECSIRJ-KTKRTIGZSA-N
 Ligand Interaction
SUV
Query on SUV

Download SDF File 
Download CCD File 
A
[(7R)-4-(5-chloro-1,3-benzoxazol-2-yl)-7-methyl-1,4-diazepan-1-yl][5-methyl-2-(2H-1,2,3-triazol-2-yl)phenyl]methanone
suvorexant
C23 H23 Cl N6 O2
JYTNQNCOQXFQPK-MRXNPFEDSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SUVKi: 0.6 - 1.7 nM (91) BINDINGDB
SUVIC50: 50 nM (91) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.751 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 63.242α = 90.00
b = 64.992β = 90.00
c = 181.478γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
HKL-3000data scaling
HKL-3000data reduction
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-09
    Type: Initial release
  • Version 1.1: 2016-03-23
    Type: Database references
  • Version 1.2: 2016-04-13
    Type: Database references