Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Macromolecule Content

• Total Structure Weight: 56.20 kDa 
• Atom Count: 3558 
• Residue Count: 438 
• Unique protein chains: 1

3P0U

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

• DOI: 10.2210/pdb3P0U/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2010-09-29 Released: 2010-11-10 
• Deposition Author(s): Zhou, X.E., Suino-Powell, K.M., Xu, Y., Chan, C.-W., Kruse, S.W., Reynolds, R., Engel, J.D., Xu, H.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.287 
• R-Value Work: 0.258 
• R-Value Observed: 0.260 

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

• PubMed: 21068381 
• DOI: 10.1074/jbc.M110.168740
• Primary Citation of Related Structures:  
  3P0U


• 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 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.

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Organizational Affiliation: 

Laboratory of Structural Sciences and Drug Discovery, Van Andel Research Institute, Grand Rapids, Michigan 49503, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nuclear receptor subfamily 2 group C member 2	A, B	249	Homo sapiens	Mutation(s): 2  Gene Names: NR2C2, TAK1, TR4
Find proteins for P49116 (Homo sapiens) Explore P49116  Go to UniProtKB:  P49116
NIH Common Fund Data Resources
PHAROS:  P49116 GTEx:  ENSG00000177463

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.287 
• R-Value Work: 0.258 
• R-Value Observed: 0.260 
• Space Group: F 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 129.479	α = 90
b = 140.963	β = 90
c = 184.863	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASES	phasing
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-09-29 
• Released Date: 2010-11-10 
Deposition Author(s): Zhou, X.E., Suino-Powell, K.M., Xu, Y., Chan, C.-W., Kruse, S.W., Reynolds, R., Engel, J.D., Xu, H.E.

Revision History 

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