A Ligand-mediated Hydrogen Bond Network Required for the Activation of the Mineralocorticoid Receptor
Bledsoe, R.K., Madauss, K.P., Holt, J.A., Apolito, C.J., Lambert, M.H., Pearce, K.H., Stanley, T.B., Stewart, E.L., Trump, R.P., Willson, T.M., Williams, S.P.(2005) J Biol Chem 280: 31283-31293
- PubMed: 15967794 
- DOI: 10.1074/jbc.M504098200
- Primary Citation of Related Structures:  
2AA2, 2AA5, 2AA6, 2AA7, 2AAX, 2AB2 - PubMed Abstract: 
Ligand binding is the first step in hormone regulation of mineralocorticoid receptor (MR) activity. Here, we report multiple crystal structures of MR (NR3C2) bound to both agonist and antagonists. These structures combined with mutagenesis studies reveal that maximal receptor activation involves an intricate ligand-mediated hydrogen bond network with Asn770 which serves dual roles: stabilization of the loop preceding the C-terminal activation function-2 helix and direct contact with the hormone ligand ...