Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 3 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 118.15 kDa 
• Atom Count: 7782 
• Modelled Residue Count: 920 
• Deposited Residue Count: 1012 
• Unique protein chains: 1

1PQC

HUMAN LXR BETA HORMONE RECEPTOR COMPLEXED WITH T0901317

• PDB DOI: 10.2210/pdb1PQC/pdb

• Classification: transcription regulation
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-06-18 Released: 2003-09-09 
• Deposition Author(s): Farnegardh, M., Bonn, T., Sun, S., Ljunggren, J., Ahola, H., Wilhelmsson, A., Gustafsson, J.-A., Carlquist, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.262 
• R-Value Work: 0.195 
• R-Value Observed: 0.199 

Literature

The three-dimensional structure of the liver X receptor beta reveals a flexible ligand-binding pocket that can accommodate fundamentally different ligands.

Farnegardh, M., Bonn, T., Sun, S., Ljunggren, J., Ahola, H., Wilhelmsson, A., Gustafsson, J.-A., Carlquist, M.

(2003) J Biol Chem 278: 38821-38828

• PubMed: 12819202 
• DOI: 10.1074/jbc.M304842200
• Primary Citation of Related Structures:  
  1PQ6, 1PQ9, 1PQC


• PubMed Abstract: 
  

The structures of the liver X receptor LXRbeta (NR1H2) have been determined in complexes with two synthetic ligands, T0901317 and GW3965, to 2.1 and 2.4 A, respectively. Together with its isoform LXRalpha (NR1H3) it regulates target genes involved in metabolism and transport of cholesterol and fatty acids. The two LXRbeta structures reveal a flexible ligand-binding pocket that can adjust to accommodate fundamentally different ligands. The ligand-binding pocket is hydrophobic but with polar or charged residues at the two ends of the cavity. T0901317 takes advantage of this by binding to His-435 close to H12 while GW3965 orients itself with its charged group in the opposite direction. Both ligands induce a fixed "agonist conformation" of helix H12 (also called the AF-2 domain), resulting in a transcriptionally active receptor.

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Organizational Affiliation: 

Karo Bio AB, NOVUM, Karolinska Institute, Huddinge University Hosptial, Sweden. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Oxysterols receptor LXR-beta	A, B, C, D	253	Homo sapiens	Mutation(s): 0  Gene Names: NR1H2 OR LXRB OR UNR OR NER, NR1H2, LXRB, NER, UNR
UniProt & NIH Common Fund Data Resources
Find proteins for P55055 (Homo sapiens) Explore P55055  Go to UniProtKB:  P55055
PHAROS:  P55055

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
444	E [auth A], F [auth B], G [auth C], H [auth D]	N-(2,2,2-TRIFLUOROETHYL)-N-{4-[2,2,2-TRIFLUORO-1-HYDROXY-1-(TRIFLUOROMETHYL)ETHYL]PHENYL}BENZENESULFONAMIDE C17 H12 F9 N O3 S SGIWFELWJPNFDH-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
444	BindingDB:  1PQC	Ki: min: 17, max: 41 (nM) from 2 assay(s)
		Kd: 103 (nM) from 1 assay(s)
		IC50: min: 9, max: 2.60e+4 (nM) from 9 assay(s)
		EC50: min: 4.7, max: 800 (nM) from 32 assay(s)
	PDBBind:  1PQC	IC50: 100 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.262 
• R-Value Work: 0.195 
• R-Value Observed: 0.199 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 58.722	α = 90
b = 103.262	β = 90
c = 176.002	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-18 
• Released Date: 2003-09-09 
Deposition Author(s): Farnegardh, M., Bonn, T., Sun, S., Ljunggren, J., Ahola, H., Wilhelmsson, A., Gustafsson, J.-A., Carlquist, M.

Revision History  

• Version 1.0: 2003-09-09
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance