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Related Experiment Videos

Vitamin D 1 alpha-hydroxylase.

W L Miller1, A A Portale

  • 1Department of Pediatrics, Building MR-IV, Room 209, University of California San Francisco, San Francisco, CA 94143-0978, USA. wlmlab@itsa.ucsf.edu

Trends in Endocrinology and Metabolism: TEM
|September 21, 2000
PubMed
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The enzyme P450c1 alpha is crucial for vitamin D activation. Mutations in this gene cause vitamin D-dependent rickets, type I, though its hormonal regulation is still being studied.

Area of Science:

  • Biochemistry
  • Endocrinology
  • Genetics

Background:

  • Vitamin D bioactivation involves a critical, hormonally controlled step: renal 1 alpha-hydroxylation.
  • This process is catalyzed by the enzyme P450c1 alpha.
  • Genetic studies have linked P450c1 alpha mutations to vitamin D-dependent rickets, type I.

Purpose of the Study:

  • To investigate the molecular mechanisms behind the hormonal regulation of P450c1 alpha.

Main Methods:

  • Cloning of the human P450c1 alpha cDNA and gene from keratinocytes.
  • Genetic analysis of over 30 patients with P450c1 alpha-related conditions.
  • Comparative cloning of the rodent P450c1 alpha enzyme by other research groups.

Main Results:

Related Experiment Videos

  • Successful cloning of the human P450c1 alpha gene and cDNA.
  • Established the causal link between P450c1 alpha mutations and vitamin D-dependent rickets, type I.
  • Confirmed the cloning of the rodent P450c1 alpha enzyme.

Conclusions:

  • The genetics of P450c1 alpha are well-understood, with over 30 patient studies.
  • Further research is needed to elucidate the molecular mechanisms governing P450c1 alpha's hormonal regulation.