Download MendeleyCrystal structure of a heterodimeric complex of RAR and RXR ligand-binding domains.
Bourguet, W., Vivat, V., Wurtz, J.M., Chambon, P., Gronemeyer, H., Moras, D.(2000) Mol Cell 5: 289-298
- PubMed: 10882070
- DOI: https://doi.org/10.1016/s1097-2765(00)80424-4
- Primary Citation of Related Structures:
1DKF - PubMed Abstract:
The crystal structure of a heterodimer between the ligand-binding domains (LBDs) of the human RARalpha bound to a selective antagonist and the constitutively active mouse RXRalphaF318A mutant shows that, pushed by a bulky extension of the ligand, RARalpha helix H12 adopts an antagonist position. The unexpected presence of a fatty acid in the ligand-binding pocket of RXRalpha(F318A is likely to account for its apparent "constitutivity." Specific conformational changes suggest the structural basis of pure and partial antagonism. The RAR-RXR heterodimer interface is similar to that observed in most nuclear receptor (NR) homodimers. A correlative analysis of 3D structures and sequences provides a novel view on dimerization among members of the nuclear receptor superfamily.
Organizational Affiliation:
Institut de Génétique et de Biologie Moléculaire et Cellulaire, CRNS/INSERM/Université Louis Pasteur/Collège de France, Illkirch, Strasbourg.
