4ZJC

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.83 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.219 

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:  
    4ZJC, 4ZJ8

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
human OX1R fusion protein to P.abysii glycogen synthaseA553Homo sapiensPyrococcus abyssi GE5Mutation(s): 1 
Gene Names: HCRTR1
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs): Class A
Protein: 
OX1 orexin receptor with bound suvorexant
Find proteins for Q9V2J8 (Pyrococcus abyssi (strain GE5 / Orsay))
Explore Q9V2J8 
Go to UniProtKB:  Q9V2J8
Find proteins for O43613 (Homo sapiens)
Explore O43613 
Go to UniProtKB:  O43613
NIH Common Fund Data Resources
PHAROS  O43613
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4OT
Query on 4OT

Download Ideal Coordinates CCD File 
A
[5-(2-fluorophenyl)-2-methyl-1,3-thiazol-4-yl]{(2S)-2-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]pyrrolidin-1-yl}methanone
C24 H21 F N4 O2 S
HYBZWVLPALMACV-KRWDZBQOSA-N
 Ligand Interaction
OLA
Query on OLA

Download Ideal Coordinates CCD File 
A
OLEIC ACID
C18 H34 O2
ZQPPMHVWECSIRJ-KTKRTIGZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
4OTKi:  1.100000023841858   nM  BindingDB
4OTKd:  5.099999904632568   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.83 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.219 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.431α = 90
b = 66.466β = 90
c = 182.129γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Blu-Icedata collection
HKL-3000data scaling
PHASERphasing
HKL-3000data reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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