1KB6

Crystal Structure of VDR DNA-binding Domain Bound to Rat Osteocalcin (OC) Response Element


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.223 

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This is version 1.2 of the entry. See complete history


Literature

Structural basis of VDR-DNA interactions on direct repeat response elements.

Shaffer, P.L.Gewirth, D.T.

(2002) EMBO J 21: 2242-2252

  • DOI: 10.1093/emboj/21.9.2242
  • Primary Citation of Related Structures:  
    1KB6, 1KB4, 1KB2

  • PubMed Abstract: 
  • The vitamin D receptor (VDR) forms homo- or heterodimers on response elements composed of two hexameric half-sites separated by 3 bp of spacer DNA. We describe here the crystal structures at 2.7-2.8 A resolution of the VDR DNA-binding region (DBD) in complex with response elements from three different promoters: osteopontin (SPP), canonical DR3 and osteocalcin (OC) ...

    The vitamin D receptor (VDR) forms homo- or heterodimers on response elements composed of two hexameric half-sites separated by 3 bp of spacer DNA. We describe here the crystal structures at 2.7-2.8 A resolution of the VDR DNA-binding region (DBD) in complex with response elements from three different promoters: osteopontin (SPP), canonical DR3 and osteocalcin (OC). These structures reveal the chemical basis for the increased affinity of VDR for the SPP response element, and for the poor stability of the VDR-OC complex, relative to the canonical DR3 response element. The homodimeric protein-protein interface is stabilized by van der Waals interactions and is predominantly non-polar. An extensive alpha-helix at the C-terminal end of the VDR DBD resembles that found in the thyroid hormone receptor (TR), and suggests a mechanism by which VDR and TR discriminate among response elements. Selective structure-based mutations in the asymmetric homodimeric interface result in a VDR DBD protein that is defective in homodimerization but now forms heterodimers with the 9-cis retinoic acid receptor (RXR) DBD.


    Organizational Affiliation

    Department of Biochemistry, Duke University Medical Center, Durham, NC 27710, USA.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Vitamin D3 ReceptorC [auth A], D [auth B]110Homo sapiensMutation(s): 0 
Gene Names: VDRNR1I1
UniProt & NIH Common Fund Data Resources
Find proteins for P11473 (Homo sapiens)
Explore P11473 
Go to UniProtKB:  P11473
PHAROS:  P11473
Protein Feature View
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  • Reference Sequence
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  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    5'-D(*CP*AP*CP*GP*GP*GP*TP*GP*AP*AP*TP*GP*AP*GP*GP*AP*CP*A)-3'A [auth C]18N/A
    Protein Feature View
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    • Reference Sequence
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    • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      5'-D(*TP*GP*TP*CP*CP*TP*CP*AP*TP*TP*CP*AP*CP*CP*CP*GP*TP*G)-3'B [auth D]18N/A
      Protein Feature View
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      • Reference Sequence
      Small Molecules
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.70 Å
      • R-Value Free: 0.275 
      • R-Value Work: 0.223 
      • Space Group: P 43 21 2
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 61.15α = 90
      b = 61.15β = 90
      c = 241.8γ = 90
      Software Package:
      Software NamePurpose
      CNSrefinement
      HKL-2000data reduction
      HKL-2000data scaling
      CNSphasing

      Structure Validation

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      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2002-05-03
        Type: Initial release
      • Version 1.1: 2008-04-27
        Changes: Version format compliance
      • Version 1.2: 2011-07-13
        Changes: Version format compliance