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Expression, purification, and characterization of multiple, multifunctional human glucocorticoid receptor proteins

Protein Expression and Purification, ISSN: 1046-5928, Vol: 62, Issue: 1, Page: 29-35
2008
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Article Description

The glucocorticoid receptor (GR) is a nuclear receptor protein that plays a central role in glucose homeostasis, the stress response, control of the hypothalamic-pituitary-adrenal axis, and immuno-inflammatory processes via binding of the natural steroid, cortisol. GR is a well-validated drug target and continues to be an important target for new drug discovery efforts. Here, we describe a basic and simple method for Escherichia coli expression and purification of a variety of human GR proteins that contain all three of the functional domains of the protein: the activation function-1 domain, the DNA-binding domain, and the ligand-binding domain. We present characterization data to show that these purified, multifunctional GR proteins are active for ligand, coactivator, and DNA-binding. The work presented here should serve as a reference for future mechanistic, structural and drug discovery efforts that require purified, full or near full length, GR protein.

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