Nuclear receptor ligand-binding domains: reduction of helix H12 dynamics to favour crystallization.
Acta Crystallogr Sect F Struct Biol Cryst Commun
; 64(Pt 7): 614-6, 2008 Jul 01.
Article
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| MEDLINE
| ID: mdl-18607089
ABSTRACT
Crystallization trials of the human retinoid X receptor alpha ligand-binding domain (RXRalpha LBD) in complex with various ligands have been carried out. Using fluorescence anisotropy, it has been found that when compared with agonists these small-molecule effectors enhance the dynamics of the RXRalpha LBD C-terminal helix H12. In some cases, the mobility of this helix could be dramatically reduced by the addition of a 13-residue co-activator fragment (CoA). In keeping with these observations, crystals have been obtained of the corresponding ternary RXRalpha LBD-ligand-CoA complexes. In contrast, attempts to crystallize complexes with a highly mobile H12 remained unsuccessful. These experimental observations substantiate the previously recognized role of co-regulator fragments in facilitating the crystallization of nuclear receptor LBDs.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Receptores Citoplasmáticos y Nucleares
Límite:
Humans
Idioma:
En
Revista:
Acta Crystallogr Sect F Struct Biol Cryst Commun
Año:
2008
Tipo del documento:
Article
País de afiliación:
Francia