Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 31.90 kDa 
• Atom Count: 2513 
• Modelled Residue Count: 251 
• Deposited Residue Count: 270 
• Unique protein chains: 1

1N83

Crystal Structure of the complex between the Orphan Nuclear Hormone Receptor ROR(alpha)-LBD and Cholesterol

• DOI: 10.2210/pdb1N83/pdb

• Classification: LIPID BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2002-11-19 Released: 2002-12-11 
• Deposition Author(s): Kallen, J.A., Schlaeppi, J.M., Bitsch, F., Geisse, S., Geiser, M., Delhon, I., Fournier, B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.63 Å
• R-Value Free: 0.223 
• R-Value Work: 0.201 
• R-Value Observed: 0.202 

Literature

X-ray Structure of hROR(alpha) LBD at 1.63A: Structural and Functional data that Cholesterol or a Cholesterol derivative is the natural ligand of ROR(alpha)

Kallen, J.A., Schlaeppi, J.M., Bitsch, F., Geisse, S., Geiser, M., Delhon, I., Fournier, B.

(2002) Structure 10: 1697-1702

• PubMed: 12467577 
• DOI: 10.1016/s0969-2126(02)00912-7
• Primary Citation of Related Structures:  
  1N83


• PubMed Abstract: 
  

The retinoic acid-related orphan receptor alpha (RORalpha) is an orphan member of the subfamily 1 of nuclear hormone receptors. No X-ray structure of RORalpha has been described so far, and no ligand has been identified. We describe the first crystal structure of the ligand binding domain (LBD) of RORalpha, at 1.63 A resolution. This structure revealed a ligand present in the ligand binding pocket (LBP), which was identified by X-ray crystallography as cholest-5-en-3beta-ol (cholesterol). Moreover, RORalpha transcriptional activity could be modulated by changes in intracellular cholesterol level or mutation of residues involved in cholesterol binding. These findings suggest that RORalpha could play a key role in the regulation of cholesterol homeostasis and thus represents an important drug target in cholesterol-related diseases.

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Organizational Affiliation: 

Central Technologies, Protein Structure Unit, Novartis Pharma AG, CH-4002 Basel, Switzerland. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nuclear receptor ROR-alpha	A	270	Homo sapiens	Mutation(s): 0  Gene Names: RORA, NR1F1, RZRA
UniProt & NIH Common Fund Data Resources
Find proteins for P35398 (Homo sapiens) Explore P35398  Go to UniProtKB:  P35398
PHAROS:  P35398 GTEx:  ENSG00000069667

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CLR (Subject of Investigation/LOI)	B [auth A]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.63 Å
• R-Value Free: 0.223 
• R-Value Work: 0.201 
• R-Value Observed: 0.202 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.8	α = 90
b = 49.7	β = 98.4
c = 60.5	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MLPHARE	phasing
REFMAC	refinement

Structure Validation

Ligand Structure Quality Assessment  

Entry History 

Deposition Data

• Deposited Date: 2002-11-19 
• Released Date: 2002-12-11 
Deposition Author(s): Kallen, J.A., Schlaeppi, J.M., Bitsch, F., Geisse, S., Geiser, M., Delhon, I., Fournier, B.

Revision History  

• Version 1.0: 2002-12-11
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance