1S0X

Crystal structure of the human RORalpha ligand binding domain in complex with cholesterol sulfate at 2.2A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the human RORalpha Ligand binding domain in complex with cholesterol sulfate at 2.2 A

Kallen, J.Schlaeppi, J.M.Bitsch, F.Delhon, I.Fournier, B.

(2004) J.Biol.Chem. 279: 14033-14038

  • DOI: 10.1074/jbc.M400302200

  • PubMed Abstract: 
  • The retinoic acid-related orphan receptor alpha (RORalpha) is an orphan member of the subfamily 1 of nuclear hormone receptors. Our recent structural and functional studies have led to the hypothesis that cholesterol or a cholesterol derivative is th ...

    The retinoic acid-related orphan receptor alpha (RORalpha) is an orphan member of the subfamily 1 of nuclear hormone receptors. Our recent structural and functional studies have led to the hypothesis that cholesterol or a cholesterol derivative is the natural ligand of RORalpha. We have now solved the x-ray crystal structure of the ligand binding domain of RORalpha in complex with cholesterol-3-O-sulfate following a ligand exchange experiment. In contrast to the 3-hydroxyl of cholesterol, the 3-O-sulfate group makes additional direct hydrogen bonds with three residues of the RORalpha ligand binding domain, namely NH-Gln(289), NH-Tyr(290), and NH1-Arg(370). When compared with the complex with cholesterol, seven well ordered water molecules have been displaced, and the ligand is slightly shifted toward the hydrophilic part of the ligand binding pocket, which is ideally suited for interactions with a sulfate group. These additional ligand-protein interactions result in an increased affinity of cholesterol sulfate when compared with cholesterol, as shown by mass spectrometry analysis done under native conditions and differential scanning calorimetry. Moreover, mutational studies show that the higher binding affinity of cholesterol sulfate translates into an increased transcriptional activity of RORalpha. Our findings suggest that cholesterol sulfate could play a crucial role in the regulation of RORalpha in vivo.


    Related Citations: 
    • X-ray structure of the hRORalpha LBD at 1.63A: Structural and functional data that cholesterol or a cholesterol derivative is the natural ligand of RORalpha
      Kallen, J.,Schlaeppi, J.-M.,Bitsch, F.,Geisse, S.,Geiser, M.,Delhon, I.,Fournier, B.
      (2002) Structure 10: 1697


    Organizational Affiliation

    Discovery Technologies, Protein Structure Unit, Basel, Switzerland. joerg.kallen@pharma.novartis.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor ROR-alpha
A
270Homo sapiensGene Names: RORA (NR1F1, RZRA)
Find proteins for P35398 (Homo sapiens)
Go to Gene View: RORA
Go to UniProtKB:  P35398
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C3S
Query on C3S

Download SDF File 
Download CCD File 
A
CHOLEST-5-EN-3-YL HYDROGEN SULFATE
CHOLESTEROL-SULFATE
C27 H46 O4 S
BHYOQNUELFTYRT-DPAQBDIFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.197 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 54.400α = 90.00
b = 49.900β = 97.80
c = 60.700γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
DENZOdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-10
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance