Affinity transfer by CDR grafting on a nonimmunoglobulin scaffold.
Protein Sci
; 13(7): 1882-91, 2004 Jul.
Article
en En
| MEDLINE
| ID: mdl-15169956
ABSTRACT
Neocarzinostatin (NCS) is a small "all beta" protein displaying the same overall fold as immunoglobulins. This protein possesses a well-defined hydrophobic core and two loops structurally equivalent to the CDR1 and CDR3 of immunoglobulins. NCS is the most studied member of the enediynechromoprotein family, and is clinically used as an antitumoral agent. NCS has promise as a drug delivery vehicle if new binding specificities could be conferred on its protein scaffold. Previous studies have shown that the binding specificity of the crevasse can be extended to compounds completely unrelated to the natural enediyne chromophore family. We show here that it is possible to introduce new interaction capacities to obtain a protein useful for drug targeting by modifying the immunoglobulin CDR-like loops. We transferred the CDR3 of the VHH chain of camel antilysozyme immunoglobulin to the equivalent site in the corresponding loop of neocarzinostatin. We then evaluated the stability of the resulting structure and its affinity for lysozyme. The engineered NCS-CDR3 presents a structure similar to that of the wild-type NCS, and is stable and efficiently produced. ELISA, ITC, and SPR measurements demonstrated that the new NCS-CDR3 specifically bound lysozyme.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteínas Bacterianas
/
Proteínas Recombinantes de Fusión
/
Muramidasa
/
Cinostatina
/
Regiones Determinantes de Complementariedad
Límite:
Animals
Idioma:
En
Revista:
Protein Sci
Asunto de la revista:
BIOQUIMICA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Francia