Cited by 50Vitamin D Research StudiesParathyroid Disorders and TreatmentsProtein Interaction Studies and Fluorescence Analysis

The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.

Characterization of a specific, high affinity binding macromolecule for 1 alpha, 25-dihydroxyvitamin D3 in cultured chick kidney cells

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Simpson, R.U., Franceschi, R.T., DeLuca, H.F.·1980·Journal of Biological Chemistry

Abstract

Cytosol prepared from vitamin D3-deficient kidney cells in culture contains a 3.7 S protein that specifically binds 1,25-dihydroxyvitamin D3 with high affinity and low capacity. Whole kidney homogenate cytosol preparations are shown to possess two 1,25-dihydroxyvitamin D3 binding macromolecules. One of the binding proteins sediments at 3.5 to 3.7 S while the second sediments at 6.0 S. The 6.0 S component has a greater affinity for 25-dihydroxyvitamin D3 than for 1,25-dihydroxyvitamin D3. Cultured cell cytosol was found to have little 6.0 S 25-hydroxyvitamin D3 binding protein. Scatchard analysis of the cultured cell cytosol reveals an equilibrium binding constant (KD) of 5.6 x 10 (-11) with 57 fmol of sites/mg of protein. The receptor-like protein has a Mr = 72,000 and as with other steroid receptors it aggregates in the presence of low potassium concentrations. Analog competition for receptor binding reveals the following potency order: 1,25-dihydroxyvitamin D3 > 25-hydroxyvitamin D3 > 1 alpha-hydroxyvitamin D3 > 24(R),25-dihydroxyvitamin D3; the receptor had no detectable affinity for vitamin D3. The kidney cells respond to 1,25-dihydroxyvitamin D3 by diminishing 25-hydroxyvitamin D3 1 alpha-hydroxylation and increasing 24R-hydroxylation. Cultured cells provide a preparation of cytosol which has allowed extensive characterization of the renal 1,25-dihydroxyvitamin D3 receptor and should facilitate investigations into the role this receptor plays in renal control of vitamin D3 metabolism.

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Crossref · 10.1016/s0021-9258(19)70442-6

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Research works printed but not linked: 3

  1. Bligh, 1959, Can. J. Biochem. Physiol., 37, 911, 10.1139/y59-099 · DOI · Paper page
  2. Cooke, 1979, Clin. Res., 27, 44A
  3. DeLuca, 1979, 83, 1

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Metadata

Authors
Simpson, R. U., Franceschi, R. T., & DeLuca, H. F.
Affiliations
University of Wisconsin–Madison (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1980-11
Volume
255
Issue
21
Pages
10160-10166
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1509999489
Cited by
50
References
32
Citations by year
2020: 1 · 2018: 2 · 2017: 1
FWCI
6.62
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Vitamin D Research Studies
  • Health Sciences › Medicine › Nephrology › Parathyroid Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Interaction Studies and Fluorescence Analysis
Keywords
1,25-dihydroxyvitamin D3, vitamin D receptor, 25-hydroxyvitamin D3, 1α-hydroxyvitamin D3, chick kidney cells, receptor binding affinity
MeSH terms
Animals, Binding, Competitive, Cells, Cultured, Chickens, Cytosol, Kidney, Kinetics, Molecular Weight, Receptors, Steroid, Vitamin D Deficiency, Receptors, Calcitriol

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