Work

Vitamin D receptor interaction with specific DNA requires a nuclear protein and 1,25-dihydroxyvitamin D3.

Year: 1990

Type: article

Abstract: The regulation of osteocalcin gene expression by 1,25-dihydroxyvitamin D3 is mediated by the vitamin D receptor and a cis-acting DNA response element that has been identified within the 5' region of the osteocalcin promoter. In this report, we show that vitamin D receptors derived from nuclear extracts of mammalian cells bind directly to this cis-acting element in vitro and do so in a manner requiring hormone. Vitamin D receptors derived from reticulocyte lysate translations in vitro or from extracts of a Saccharomyces cerevisiae strain that expresses the recombinant protein also bind the osteocalcin responsive element, but only when nuclear extracts of mammalian cells are provided. The vitamin-D-receptor-DNA-binding accessory factor is isolated by salt extraction, labile to temperature, and sensitive to tryptic digestion. These studies suggest that the high-affinity interaction of the vitamin D receptor with the osteocalcin vitamin D response element in vitro requires both 1,25-dihydroxyvitamin D3 and an accessory protein derived from the mammalian cell nucleus.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.87.24.9751

Authors: J Liao, K Ozono, T Sone, D P McDonnell, J W Pike

Institution: Baylor College of Medicine

Language: English

Topic: Vitamin D Research Studies

Subfield: Pathology and Forensic Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funders: National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, National Institute of Arthritis and Musculoskeletal and Skin Diseases