alexa Selective DNA recognition by the androgen receptor as a mechanism for hormone-specific regulation of gene expression.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Steroids & Hormonal Science

Author(s): Verrijdt G, Haelens A, Claessens F

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Abstract The androgen receptor (AR) is a member of the highly conserved group of the class I steroid hormone receptors, a subgroup of the nuclear receptor superfamily of ligand-induced transcription factors. All class I receptors influence the expression of their target genes by binding three-nucleotide spaced partial palindromic repeats of the core 5'-TGTTCT-3' motif. The implication that all class I receptors activate transcription by binding similar DNA motifs, poses the problem of how the in vivo steroid-specificity of transcriptional control is achieved. The AR, however, is able to interact with DNA motifs that are divergent from the classical hormone response elements. We will describe this AR-specific DNA interaction in the context of the general mechanisms that dictate the sequence-specificity of DNA-binding and dimerization of the nuclear receptors. The androgen receptor is the only steroid hormone receptor that is able to interact with response elements that are essentially arranged as a direct repeat of the 5'-TGTTCT-3' monomer binding element. We propose that the DNA-binding domain of the AR can interact with these androgen-specific response elements in a head-to-tail conformation, similar to many other nuclear hormone receptors. The fact that subtle differences in the sequence of response elements can dictate androgen-specific responses is a new and intriguing finding. It creates new possibilities in the research on hormone-selective action and provides a new angle in the search for selective ligands or co-factors that might influence androgen receptor action via either type of DNA motif. Copyright 2003 Elsevier Science (USA)
This article was published in Mol Genet Metab and referenced in Journal of Steroids & Hormonal Science

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