X-ray crystal structure of the liver X receptor beta ligand binding domain: regulation by a histidine-tryptophan switch.
Williams, S., Bledsoe, R.K., Collins, J.L., Boggs, S., Lambert, M.H., Miller, A.B., Moore, J., McKee, D.D., Moore, L., Nichols, J., Parks, D., Watson, M., Wisely, B., Willson, T.M.(2003) J Biol Chem 278: 27138-27143
- PubMed: 12736258 
- DOI: 10.1074/jbc.M302260200
- Primary Citation of Related Structures:  
1P8D - PubMed Abstract: 
The x-ray crystal structures of the human liver X receptor beta ligand binding domain complexed to sterol and nonsterol agonists revealed a perpendicular histidinetryptophan switch that holds the receptor in its active conformation. Hydrogen bonding interactions with the ligand act to position the His-435 imidazole ring against the Trp-457 indole ring, allowing an electrostatic interaction that holds the AF2 helix in the active position ...