期刊
MOLECULAR AND CELLULAR ENDOCRINOLOGY
卷 332, 期 1-2, 页码 58-66出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.mce.2010.09.014
关键词
Ligand-binding; Deoxycorticosterone; Aldosterone; Receptor
资金
- National Health & Medical Research Council of Australia
- Prince Henry's Institute of Medical Research
- Victorian Government
Comparison between evolutionarily distant receptors can provide critical insights into both structure and function. Sequence comparison between the mineralocorticoid receptors (MR) of the zebrafish (zMR) and human (hMR) reveals a high degree of sequence conservation in the major functional domains. We isolated a zMR cDNA to contrast the transcriptional response to a range of ligands and to establish whether a teleost MR exhibits the amino/carboxyl-terminal interaction (N/C-interaction) previously reported for the hMR Aldosterone, deoxycorticosterone (DOC) and cortisol induced zMR transcriptional activity with similar efficacy to that observed with the hMR. The hMR antagonist, spironolactone, acted as an agonist with the zMR. The zMR exhibited an N/C-interaction in response to aldosterone but, in contrast to the hMR, cortisol and DOC predominantly stimulated the interaction in the zMR. Conservation of the N/C-interaction between evolutionarily distant MR provides evidence of functional significance. (C) 2010 Elsevier Ireland Ltd. All rights reserved.
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