Cloning and characterization of hGMEB1, a novel glucocorticoid modulatory element binding protein

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Abstract

A 21-bp element called glucocorticoid modulatory element (GME) modulates the glucocorticoid receptor-mediated responses via the binding of an as yet poorly characterized trans-acting complex of proteins containing the 88-kDa GMEB1 and the 67-kDa GMEB2. Using heat shock protein 27 (HSP27) as bait in the yeast two-hybrid assay, we cloned a 1.83-kb cDNA encoding a novel 573-amino acid protein called human GMEB1 (hGMEB1). hGMEB1 possesses a KDWK domain, contains sequences almost identical (36/38) to three tryptic peptides of rat GMEB1 and shares 38% identity with rat GMEB2. hGMEB1 is ubiquitously expressed as a 85-kDa protein in all cell lines and tissues examined. In vitro translated hGMEB1 bound specifically to GME oligonucleotides yielding a complex of similar size to the complex obtained using rat liver nuclear extracts. Both complexes were supershifted with an antibody specific to hGMEB1. Co-immunoprecipitation experiments confirmed the in vivo interaction of HSP27 with hGMEB1. Copyright (C) 1999 Federation of European Biochemical Societies.

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Thériault, J. R., Charette, S. J., Lambert, H., & Landry, J. (1999). Cloning and characterization of hGMEB1, a novel glucocorticoid modulatory element binding protein. FEBS Letters, 452(3), 170–176. https://doi.org/10.1016/S0014-5793(99)00634-1

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