Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 56.36 kDa 
• Atom Count: 3803 
• Residue Count: 458 
• Unique protein chains: 1

1PDU

Ligand-binding domain of Drosophila orphan nuclear receptor DHR38

• DOI: 10.2210/pdb1PDU/pdb

• Classification: HORMONE/GROWTH FACTOR RECEPTOR
• Organism(s): Drosophila melanogaster
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2003-05-20 Released: 2003-06-10 
• Deposition Author(s): Baker, K.D., Shewchuk, L.M., Korlova, T., Makishima, M., Hassell, A.M., Wisely, B., Caravella, J.A., Lambert, M.H., Wilson, T.M., Mangelsdorf, D.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.270 
• R-Value Work: 0.210 

Literature

The Drosophila orphan nuclear receptor DHR38 mediates an atypical ecdysteroid signaling pathway.

Baker, K.D., Shewchuk, L.M., Korlova, T., Makishima, M., Hassell, A.M., Wisely, B., Caravella, J.A., Lambert, M.H., Reinking, J.L., Krause, H., Thummel, C.S., Wilson, T.M., Mangelsdorf, D.J.

(2003) Cell 113: 731-742

• PubMed: 12809604 
• DOI: 10.1016/s0092-8674(03)00420-3
• Primary Citation of Related Structures:  
  1PDU


• PubMed Abstract: 
  

Ecdysteroid pulses trigger the major developmental transitions during the Drosophila life cycle. These hormonal responses are thought to be mediated by the ecdysteroid receptor (EcR) and its heterodimeric partner Ultraspiracle (USP). We provide evidence for a second ecdysteroid signaling pathway mediated by DHR38, the Drosophila ortholog of the mammalian NGFI-B subfamily of orphan nuclear receptors. DHR38 also heterodimerizes with USP, and this complex responds to a distinct class of ecdysteroids in a manner that is independent of EcR. This response is unusual in that it does not involve direct binding of ecdysteroids to either DHR38 or USP. X-ray crystallographic analysis of DHR38 reveals the absence of both a classic ligand binding pocket and coactivator binding site, features that seem to be common to all NGFI-B subfamily members. Taken together, these data reveal the existence of a separate structural class of nuclear receptors that is conserved from fly to humans.

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Organizational Affiliation: 

Howard Hughes Medical Institute and Department of Pharmacology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
nuclear hormone receptor HR38	A, B	244	Drosophila melanogaster	Mutation(s): 0  Gene Names: Hr38, NR4A4, CG1864
Find proteins for P49869 (Drosophila melanogaster) Explore P49869  Go to UniProtKB:  P49869

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.270 
• R-Value Work: 0.210 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.379	α = 90
b = 82.231	β = 90
c = 84.147	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
SHARP	phasing
CNS	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-05-20 
• Released Date: 2003-06-10 
Deposition Author(s): Baker, K.D., Shewchuk, L.M., Korlova, T., Makishima, M., Hassell, A.M., Wisely, B., Caravella, J.A., Lambert, M.H., Wilson, T.M., Mangelsdorf, D.J.

Revision History 

• Version 1.0: 2003-06-10
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance