3IPU

X-ray structure of benzisoxazole urea synthetic agonist bound to the LXR-alpha


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

X-ray structures of the LXRalpha LBD in its homodimeric form and implications for heterodimer signaling.

Fradera, X.Vu, D.Nimz, O.Skene, R.Hosfield, D.Wynands, R.Cooke, A.J.Haunso, A.King, A.Bennett, D.J.McGuire, R.Uitdehaag, J.C.

(2010) J Mol Biol 399: 120-132

  • DOI: 10.1016/j.jmb.2010.04.005
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Liver X receptors (LXRs) are nuclear receptors that are central regulators of cholesterol homeostasis, and synthetic LXR agonists have shown promise as promoters of reverse cholesterol transport and anti-inflammatory agents. Here, we present three X- ...

    Liver X receptors (LXRs) are nuclear receptors that are central regulators of cholesterol homeostasis, and synthetic LXR agonists have shown promise as promoters of reverse cholesterol transport and anti-inflammatory agents. Here, we present three X-ray structures of three different agonists bound to the ligand binding domain of LXRalpha. These compounds are GW3965, F(3)methylAA, and a benzisoxazole urea, and we show that these diverse chemical scaffolds address common structural themes, leading to high binding affinity for LXR. Our structures show the LXRalpha ligand binding domain in its homodimeric form, an arrangement previously thought to be stereochemically difficult. A comparison with existing structures of the LXRbeta homodimer and LXRalpha:RXR (retinoid X receptor) heterodimers explains differences in dimer affinity and leads us to propose a model for allosteric activation in nuclear receptor dimers, in which an unactivated RXR partner provides an inhibitory tail wrap to the cofactor binding pocket of LXR.


    Organizational Affiliation

    Department of Chemistry, Merck Research Labs, Newhouse, ML1 5SH, Scotland, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor coactivator 1
C, D
25N/AMutation(s): 0 
EC: 2.3.1.48
Find proteins for Q15788 (Homo sapiens)
Go to UniProtKB:  Q15788
NIH Common Fund Data Resources
PHAROS  Q15788
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Oxysterols receptor LXR-alpha
A, B
283Homo sapiensMutation(s): 0 
Gene Names: LXRANR1H3
Find proteins for Q13133 (Homo sapiens)
Go to UniProtKB:  Q13133
NIH Common Fund Data Resources
PHAROS  Q13133
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
O40
Query on O40

Download CCD File 
A, B
4-{[methyl(3-{[7-propyl-3-(trifluoromethyl)-1,2-benzisoxazol-6-yl]oxy}propyl)carbamoyl]amino}benzoic acid
C23 H24 F3 N3 O5
JBWDFALEPSJCLA-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
O40Ki :  48   nM  PDBBind
O40Ki:  48   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.178α = 90
b = 125.178β = 90
c = 92.957γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
AMoREphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance