3P0U

Crystal Structure of the ligand binding domain of human testicular receptor 4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.258 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Orphan Nuclear Receptor TR4 Is a Vitamin A-activated Nuclear Receptor.

Zhou, X.E.Suino-Powell, K.M.Xu, Y.Chan, C.W.Tanabe, O.Kruse, S.W.Reynolds, R.Engel, J.D.Xu, H.E.

(2011) J.Biol.Chem. 286: 2877-2885

  • DOI: 10.1074/jbc.M110.168740

  • PubMed Abstract: 
  • Testicular receptors 2 and 4 (TR2/4) constitute a subgroup of orphan nuclear receptors that play important roles in spermatogenesis, lipid and lipoprotein regulation, and the development of the central nervous system. Currently, little is known about ...

    Testicular receptors 2 and 4 (TR2/4) constitute a subgroup of orphan nuclear receptors that play important roles in spermatogenesis, lipid and lipoprotein regulation, and the development of the central nervous system. Currently, little is known about the structural features and the ligand regulation of these receptors. Here we report the crystal structure of the ligand-free TR4 ligand binding domain, which reveals an autorepressed conformation. The ligand binding pocket of TR4 is filled by the C-terminal half of helix 10, and the cofactor binding site is occupied by the AF-2 helix, thus preventing ligand-independent activation of the receptor. However, TR4 exhibits constitutive transcriptional activity on multiple promoters, which can be further potentiated by nuclear receptor coactivators. Mutations designed to disrupt cofactor binding, dimerization, or ligand binding substantially reduce the transcriptional activity of this receptor. Importantly, both retinol and retinoic acid are able to promote TR4 to recruit coactivators and to activate a TR4-regulated reporter. These findings demonstrate that TR4 is a ligand-regulated nuclear receptor and suggest that retinoids might have a much wider regulatory role via activation of orphan receptors such as TR4.


    Organizational Affiliation

    Laboratory of Structural Sciences and Drug Discovery, Van Andel Research Institute, Grand Rapids, Michigan 49503, USA. edward.zhou@vai.org




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor subfamily 2 group C member 2
A, B
249Homo sapiensMutation(s): 2 
Gene Names: NR2C2 (TAK1, TR4)
Find proteins for P49116 (Homo sapiens)
Go to Gene View: NR2C2
Go to UniProtKB:  P49116
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.258 
  • Space Group: F 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 129.479α = 90.00
b = 140.963β = 90.00
c = 184.863γ = 90.00
Software Package:
Software NamePurpose
PHASESphasing
REFMACrefinement
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance