Download MendeleyStructural plasticity in the oestrogen receptor ligand-binding domain.
Nettles, K.W., Bruning, J.B., Gil, G., O'Neill, E.E., Nowak, J., Guo, Y., Kim, Y., DeSombre, E.R., Dilis, R., Hanson, R.N., Joachimiak, A., Greene, G.L.(2007) EMBO Rep 8: 563-568
- PubMed: 17468738
- DOI: https://doi.org/10.1038/sj.embor.7400963
- Primary Citation of Related Structures:
2P15 - PubMed Abstract:
The steroid hormone receptors are characterized by binding to relatively rigid, inflexible endogenous steroid ligands. Other members of the nuclear receptor superfamily bind to conformationally flexible lipids and show a corresponding degree of elasticity in the ligand-binding pocket. Here, we report the X-ray crystal structure of the oestrogen receptor alpha (ERalpha) bound to an oestradiol derivative with a prosthetic group, ortho- trifluoromethlyphenylvinyl, which binds in a novel extended pocket in the ligand-binding domain. Unlike ER antagonists with bulky side groups, this derivative is enclosed in the ligand-binding pocket, and acts as a potent agonist. This work shows that steroid hormone receptors can interact with a wider array of pharmacophores than previously thought through structural plasticity in the ligand-binding pocket.
Organizational Affiliation:
Department of Cancer Biology, The Scripps Research Institute, 5353 Parkside Drive, Jupiter, Florida 33458, USA. knettles@scripps.edu
