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Vitamin D receptor and retinoid X receptor interactions in motion

J Barsony1, K Prufer

  • 1Laboratory of Cell Biochemistry and Biology, National Institutes of Diabetes, Digestive and Kidney Diseases, NIH, Bethesda, Maryland 20892, USA. jul@helix.nih.gov

Vitamins and Hormones
|December 17, 2002
PubMed

Insights

Retinoid X receptor (RXR) dimerization is crucial for Vitamin D receptor (VDR) function, influencing gene transcription. New research reveals dynamic VDR-RXR interactions within cells, impacting VDR

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Vitamin D receptor (VDR) and retinoid X receptor (RXR) are nuclear receptors that form heterodimers to regulate gene transcription.
  • Dimerization with RXR is essential for VDR's ligand-dependent and ligand-independent functions.

Purpose of the Study:

  • To review the latest findings on RXR's role in VDR function.
  • To explore the dynamic nature of VDR-RXR heterodimerization and its implications.

Main Methods:

  • Literature review of biochemical, structural, and genetic studies.
  • Analysis of recent microscopy studies using fluorescent protein chimeras in living cells.

Main Results:

  • RXR dimerization is vital for VDR's roles in calcium homeostasis, bone development, cell growth, and hair growth.
  • VDR and RXR exhibit dynamic shuttling between cellular compartments.
  • Receptor-DNA and receptor-coregulator interactions are transient.

Conclusions:

  • RXR's role in regulating VDR dynamics has broad significance due to RXR's promiscuous dimerization.
  • Understanding these dynamic interactions offers new perspectives on nuclear receptor function.

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