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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Jun-Fos and receptors for vitamins A and D recognize a common response element in the human osteocalcin gene.

We present evidence that the vitamin D response element in the human osteocalcin gene confers responsiveness to the vitamin A metabolite, retinoic acid. Retinoic acid receptor ( RAR) expressed in E. coli binds to this sequence in vitro. Transfection of RAR expression vectors in cultured cells activates heterologous promoters containing this sequence in vivo. This response element contains a consensus AP-1 site TGACTCA and in vitro is bound by the Jun-Fos complex. Unexpectedly, cotransfection of Jun and Fos expression vectors suppresses basal level transcription of the osteocalcin gene and suppresses induction by both retinoic acid and vitamin D3. Additional studies delimit an 11 nucleotide segment as a minimal hormone response element containing the AP-1 site as its core. These results indicate that two distinct classes of transcription factors can recognize common regulatory sequences, a phenomenon we refer to as cross-coupling.[1]

References

  1. Jun-Fos and receptors for vitamins A and D recognize a common response element in the human osteocalcin gene. Schüle, R., Umesono, K., Mangelsdorf, D.J., Bolado, J., Pike, J.W., Evans, R.M. Cell (1990) [Pubmed]
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