Interaction and biophysical properties of human lens Q155* betaB2-crystallin mutant.
Mol Vis
; 11: 321-7, 2005 Apr 30.
Article
en En
| MEDLINE
| ID: mdl-15889016
ABSTRACT
PURPOSE:
Missense mutations in crystallin genes have been identified in autosomal dominant congenital cataracts. A truncation in the CRYBB2 gene (Q155*) has been associated with cerulean cataract, however its effects on biophysical properties have not been reported. We sought to determine the changes in conformation and protein-protein interactions brought about by this mutation.METHODS:
Site specific mutations were performed to obtain the Q155* betaB2-crystallin mutant. Protein-protein interactions were screened by a mammalian two-hybrid system assay. Conformational changes were studied with spectroscopy (circular dichroism and fluorescence) and FPLC chromatography.RESULTS:
We detected a decrease in protein-protein interactions for the Q155* betaB2-crystallin mutant. The Q155* mutant shows decreased ordered structure and stability but the partially unfolded protein retains some dimer structure.CONCLUSIONS:
The Q155* mutation in betaB2-crystallin causes changes in biophysical properties that might contribute to cataract formation.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Unión Proteica
/
Conformación Proteica
/
Cadena B de beta-Cristalina
Límite:
Humans
Idioma:
En
Revista:
Mol Vis
Asunto de la revista:
BIOLOGIA MOLECULAR
/
OFTALMOLOGIA
Año:
2005
Tipo del documento:
Article
País de afiliación:
Estados Unidos