4OZT

crystal structure of the ligand binding domains of the Bovicola ovis ecdysone receptor EcR/USP heterodimer (PonA crystal)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

wwPDB Validation 3D Report Full Report



Literature

Unprecedented conformational flexibility revealed in the ligand-binding domains of the Bovicola ovis ecdysone receptor (EcR) and ultraspiracle (USP) subunits.

Ren, B.Peat, T.S.Streltsov, V.A.Pollard, M.Fernley, R.Grusovin, J.Seabrook, S.Pilling, P.Phan, T.Lu, L.Lovrecz, G.O.Graham, L.D.Hill, R.J.

(2014) Acta Crystallogr D Biol Crystallogr 70: 1954-1964

  • DOI: 10.1107/S1399004714009626
  • Primary Citation of Related Structures:  
    4OZR, 4OZT

  • PubMed Abstract: 
  • The heterodimeric ligand-binding region of the Bovicola ovis ecdysone receptor has been crystallized either in the presence of an ecdysteroid or a synthetic methylene lactam insecticide. Two X-ray crystallographic structures, determined at 2.7 Å reso ...

    The heterodimeric ligand-binding region of the Bovicola ovis ecdysone receptor has been crystallized either in the presence of an ecdysteroid or a synthetic methylene lactam insecticide. Two X-ray crystallographic structures, determined at 2.7 Å resolution, show that the ligand-binding domains of both subunits of this receptor, like those of other nuclear receptors, can display significant conformational flexibility. Thermal melt experiments show that while ponasterone A stabilizes the higher order structure of the heterodimer in solution, the methylene lactam destabilizes it. The conformations of the EcR and USP subunits observed in the structure crystallized in the presence of the methylene lactam have not been seen previously in any ecdysone receptor structure and represent a new level of conformational flexibility for these important receptors. Interestingly, the new USP conformation presents an open, unoccupied ligand-binding pocket.


    Organizational Affiliation

    CSIRO Animal, Food and Health Sciences, PO Box 52, North Ryde, NSW 1670, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ecdysone receptorE238Pediculus humanus corporisMutation(s): 0 
Gene Names: Phum_PHUM4674608238728
Find proteins for E0VVT4 (Pediculus humanus subsp. corporis)
Explore E0VVT4 
Go to UniProtKB:  E0VVT4
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Retinoid X receptorU195Pediculus humanus corporisMutation(s): 0 
Gene Names: Phum_PHUM1643308236603
Find proteins for E0VFQ5 (Pediculus humanus subsp. corporis)
Explore E0VFQ5 
Go to UniProtKB:  E0VFQ5
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P1A
Query on P1A

Download CCD File 
E
2,3,14,20,22-PENTAHYDROXYCHOLEST-7-EN-6-ONE
C27 H44 O6
PJYYBCXMCWDUAZ-JJJZTNILSA-N
 Ligand Interaction
NEQ
Query on NEQ

Download CCD File 
U
N-ETHYLMALEIMIDE
C6 H7 N O2
HDFGOPSGAURCEO-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134α = 90
b = 134β = 90
c = 95.3γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-30
    Type: Initial release