Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 63698.46 
• Atom Count: 4076 
• Residue Count: 553 
• Unique protein chains: 1

4ZJC

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

• DOI: 10.2210/pdb4ZJC/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Pyrococcus abyssi (strain GE5 / Orsay), Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): 1 


• Deposited: 2015-04-29 Released: 2016-03-09 
• Deposition Author(s): Yin, J., Brautigam, C.A., Shao, Z., Clark, L., Harrell, C.M., Gotter, A.L., Coleman, P.J., Renger, J.J., Rosenbaum, D.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.832 Å
• R-Value Free: 0.262 
• R-Value Work: 0.216 

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

• PubMed: 26950369 
• DOI: 10.1038/nsmb.3183
• Primary Citation of Related Structures:  
  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 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
human OX1R fusion protein to P.abysii glycogen synthase	A	553	Pyrococcus 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
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
OLA	A	OLEIC ACID C18 H34 O2 ZQPPMHVWECSIRJ-KTKRTIGZSA-N
4OT	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

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
4OT	Ki: 1.1 nM (91) BINDINGDB
4OT	Kd: 5.1 nM (91) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.832 Å
• R-Value Free: 0.262 
• R-Value Work: 0.216 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 63.431	α = 90.00
b = 66.466	β = 90.00
c = 182.129	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
PHENIX	refinement
Blu-Ice	data collection
HKL-3000	data scaling
HKL-3000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-04-29 
• Released Date: 2016-03-09 
• Deposition Author(s): Yin, J., Brautigam, C.A., Shao, Z., Clark, L., Harrell, C.M., Gotter, A.L., Coleman, P.J., Renger, J.J., Rosenbaum, D.M.

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