2HAN

Structural basis of heterodimeric ecdysteroid receptor interaction with natural response element hsp27 gene promoter

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 

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Literature

Novel DNA-binding element within the C-terminal extension of the nuclear receptor DNA-binding domain.

Jakob, M., Kolodziejczyk, R., Orlowski, M., Krzywda, S., Kowalska, A., Dutko-Gwozdz, J., Gwozdz, T., Kochman, M., Jaskolski, M., Ozyhar, A.

(2007) Nucleic Acids Res 35: 2705-2718

  • DOI: 10.1093/nar/gkm162
  • Primary Citation of Related Structures:  
    2HAN

  • PubMed Abstract: 

    • The heterodimer of the ecdysone receptor (EcR) and ultraspiracle (Usp), members of the nuclear receptors superfamily, is considered as the functional receptor for ecdysteroids initiating molting and metamorphosis in insects. Here we report the 1.95 A structure of the complex formed by the DNA-binding domains (DBDs) the EcR and the Usp, bound to the natural pseudopalindromic response element ...

    The heterodimer of the ecdysone receptor (EcR) and ultraspiracle (Usp), members of the nuclear receptors superfamily, is considered as the functional receptor for ecdysteroids initiating molting and metamorphosis in insects. Here we report the 1.95 A structure of the complex formed by the DNA-binding domains (DBDs) the EcR and the Usp, bound to the natural pseudopalindromic response element. Comparison of the structure with that obtained previously, using an idealized response element, shows how the EcRDBD, which has been previously reported to possess extraordinary flexibility, accommodates DNA-induced structural changes. Part of the C-terminal extension (CTE) of the EcRDBD folds into an alpha-helix whose location in the minor groove does not match any of the locations previously observed for nuclear receptors. Mutational analyses suggest that the alpha-helix is a component of EcR-box, a novel element indispensable for DNA-binding and located within the nuclear receptor CTE. This element seems to be a general feature of all known EcRs.

    Organizational Affiliation: 

    Department of Biochemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspiańskiego 27, 50-370 Wrocław, Poland.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein ultraspiracleC [auth A]93Drosophila melanogasterMutation(s): 0 
Gene Names: usp, Cf1, NR2B4, CG4380
UniProt
Find proteins for P20153 (Drosophila melanogaster)
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Go to UniProtKB:  P20153
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UniProt GroupP20153
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Ecdysone receptorD [auth B]119Drosophila melanogasterMutation(s): 0 
Gene Names: EcR, NR1H1, CG1765
UniProt
Find proteins for P34021 (Drosophila melanogaster)
Explore P34021 
Go to UniProtKB:  P34021
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UniProt GroupP34021
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  • Reference Sequence

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Entity ID: 1
MoleculeChainsLengthOrganismImage
5'-D(*CP*AP*AP*GP*GP*GP*TP*TP*CP*AP*AP*TP*GP*CP*AP*CP*TP*TP*GP*T)-3'A [auth C]20N/A
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Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*GP*AP*CP*AP*AP*GP*TP*GP*CP*AP*TP*TP*GP*AP*AP*CP*CP*CP*TP*T)-3'B [auth D]20N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.716α = 90
b = 59.79β = 106.7
c = 65.179γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MAR345data collection
SCALEPACKdata scaling
EPMRphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-22
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Advisory, Refinement description