5Z12

A structure of FXR/RXR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.233 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural insights into the heterodimeric complex of the nuclear receptors FXR and RXR

Zheng, W.Lu, Y.Tian, S.Ma, F.Wei, Y.Xu, S.Li, Y.

(2018) J Biol Chem 293: 12535-12541

  • DOI: 10.1074/jbc.RA118.004188
  • Primary Citation of Related Structures:  
    5Z12

  • PubMed Abstract: 
  • Farnesoid X receptor (FXR) is a member of the family of ligand-activated nuclear receptors. FXR plays critical roles in maintaining many metabolic pathways, including bile acid regulation and glucose and lipid homeostasis, and forms a heterodimeric complex with the retinoid X receptor (RXR) ...

    Farnesoid X receptor (FXR) is a member of the family of ligand-activated nuclear receptors. FXR plays critical roles in maintaining many metabolic pathways, including bile acid regulation and glucose and lipid homeostasis, and forms a heterodimeric complex with the retinoid X receptor (RXR). Despite the important roles of the FXR/RXR heterodimerization in human physiology, the molecular basis underlying the FXR/RXR interaction is still uncertain in the absence of a complex structure. Here, we report the heterodimeric structure of FXR and RXR in the presence of an FXR agonist (WAY-362450), RXR agonist (9- cis -retinoic acid), and a peptide derived from a steroid receptor coactivator (SRC2), revealing both unique and conserved modes for FXR heterodimerization. We found that the dimerization with RXR induced allosteric conformational changes on the coactivator-binding site of FXR. These changes enhanced the transcriptional activity of FXR by promoting the coactivator binding, thus suggesting a structural basis for the functional permissiveness of the FXR/RXR heterodimer complex. Furthermore, sequence analyses together with functional mutagenesis studies indicated that the helix H10 largely responsible for the dimerization is highly conserved and also critical for the FXR transcriptional activity. Our findings highlight the important roles of RXR heterodimerization in the nuclear receptor signaling, providing a potential framework to develop pharmaceutical agents in treating FXR/RXR-related diseases.


    Organizational Affiliation

    From the State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian 361005, China yongli@xmu.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bile acid receptorA,
E [auth D]
228Homo sapiensMutation(s): 0 
Gene Names: NR1H4BARFXRHRR1RIP14
UniProt & NIH Common Fund Data Resources
Find proteins for Q96RI1 (Homo sapiens)
Explore Q96RI1 
Go to UniProtKB:  Q96RI1
PHAROS:  Q96RI1
GTEx:  ENSG00000012504 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96RI1
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Retinoic acid receptor RXR-alphaG [auth B],
B [auth C]
231Homo sapiensMutation(s): 0 
Gene Names: RXRANR2B1
UniProt & NIH Common Fund Data Resources
Find proteins for P19793 (Homo sapiens)
Explore P19793 
Go to UniProtKB:  P19793
PHAROS:  P19793
GTEx:  ENSG00000186350 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19793
Protein Feature View
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Peptide from Nuclear receptor coactivator 2C [auth F],
H [auth I]
9Homo sapiensMutation(s): 0 
Gene Names: NCOA2BHLHE75SRC2TIF2
UniProt & NIH Common Fund Data Resources
Find proteins for Q15596 (Homo sapiens)
Explore Q15596 
Go to UniProtKB:  Q15596
PHAROS:  Q15596
GTEx:  ENSG00000140396 
Entity Groups  
UniProt GroupQ15596
Protein Feature View
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Peptide from Nuclear receptor coactivator 2F [auth H],
D [auth J]
6Homo sapiensMutation(s): 0 
Gene Names: NCOA2BHLHE75SRC2TIF2
UniProt & NIH Common Fund Data Resources
Find proteins for Q15596 (Homo sapiens)
Explore Q15596 
Go to UniProtKB:  Q15596
PHAROS:  Q15596
GTEx:  ENSG00000140396 
Entity Groups  
UniProt GroupQ15596
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
33Y
Query on 33Y

Download Ideal Coordinates CCD File 
I [auth A],
K [auth D]
1-methylethyl 3-[(3,4-difluorophenyl)carbonyl]-1,1-dimethyl-1,2,3,6-tetrahydroazepino[4,5-b]indole-5-carboxylate
C25 H24 F2 N2 O3
INASOKQDNHHMRE-UHFFFAOYSA-N
 Ligand Interaction
9CR
Query on 9CR

Download Ideal Coordinates CCD File 
J [auth C],
L [auth B]
(9cis)-retinoic acid
C20 H28 O2
SHGAZHPCJJPHSC-ZVCIMWCZSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
9CR BindingDB:  5Z12 Ki: min: 3.8, max: 583 (nM) from 12 assay(s)
Kd: min: 1.5, max: 1810 (nM) from 19 assay(s)
IC50: min: 4, max: 82 (nM) from 5 assay(s)
EC50: min: 1.5, max: 316 (nM) from 22 assay(s)
33Y BindingDB:  5Z12 EC50: min: 4, max: 152 (nM) from 4 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.233 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.873α = 90
b = 95.484β = 90
c = 116.721γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-3000data reduction
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 



Entry History 

Deposition Data

  • Deposited Date: 2017-12-23 
  • Released Date: 2018-07-04 
  • Deposition Author(s): Lu, Y., Li, Y.

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-04
    Type: Initial release
  • Version 1.1: 2018-07-25
    Changes: Data collection, Database references
  • Version 1.2: 2018-08-22
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-25
    Changes: Derived calculations, Refinement description