The role of ß-sheets in the structure and assembly of keratins.
Biophys Rev
; 1(1): 27, 2009 Mar.
Article
em En
| MEDLINE
| ID: mdl-28510154
ABSTRACT
X-ray diffraction, infrared and electron microscope studies of avian and reptilian keratins, and of stretched wool and hair, have played a central role in the development of models for the ß-conformation in proteins. Both α- and ß-keratins contain sequences that are predicted to adopt a ß-conformation and these are believed to play an important part in the assembly of the filaments and in determining their mechanical properties. Interactions between the small ß-sheets in keratins provide a simple mechanism through which shape and chemical complementarity can mediate the assembly of molecules into highly specific structures. Interacting ß-sheets in crystalline proteins are often related to one another by diad symmetry and the data available on feather keratin suggest that the filament is assembled from dimers in which the ß-sheets are related by a perpendicular diad. The most detailed model currently available is for feather and reptilian keratin but the presence of related ß-structural forms in mammalian keratins is also noted.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Biophys Rev
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Nova Zelândia