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Related Experiment Videos

Vitamin D-regulated gene expression

H Darwish1, H F DeLuca

  • 1Department of Biochemistry, University of Wisconsin-Madison 53706.

Critical Reviews in Eukaryotic Gene Expression
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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This review details how vitamin D receptor (VDR) interacts with DNA to regulate gene expression. It highlights the VDR

Area of Science:

  • Molecular Biology
  • Endocrinology
  • Genetics

Background:

  • Vitamin D is a crucial hormone regulating calcium homeostasis and cellular processes.
  • The biological actions of vitamin D are mediated by the vitamin D receptor (VDR).
  • Understanding VDR's molecular interactions is key to deciphering vitamin D's physiological roles.

Purpose of the Study:

  • To review the molecular mechanisms of vitamin D action at the target tissue level.
  • To elucidate the structure and function of the vitamin D receptor (VDR).
  • To describe the interaction of VDR with DNA and accessory proteins in gene regulation.

Main Methods:

  • Review of existing literature on vitamin D receptor (VDR) structure and function.
  • Analysis of molecular events following 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3) stimulation.

Related Experiment Videos

  • Examination of VDR binding to vitamin D response elements (VDREs) and accessory proteins.

    • Main Results:

    • The vitamin D receptor (VDR) is a 55-kDa nucleoprotein that binds to specific DNA sequences (VDREs).
    • An accessory protein (approx. 62 kDa) is required for VDR binding to VDREs.
    • 1,25-(OH)2D3 binding induces VDR phosphorylation, leading to transcriptional activation.

    Conclusions:

    • The vitamin D receptor (VDR) acts as a ligand-dependent transcription factor.
    • VDR's interaction with DNA and accessory proteins is critical for gene expression.
    • Further research is needed to confirm the role of phosphorylation and ligand release in VDR activity.