Cloning and expression of kringle 1-3 gene of human plasminogen and the purification and bioactivity of its expressed product / 生物工程学报
Chinese Journal of Biotechnology
; (12): 593-596, 2002.
Article
en Zh
| WPRIM
| ID: wpr-256158
Biblioteca responsable:
WPRO
ABSTRACT
Kringle 1-3 domain is a recently found angiogenesis inhibitor with anti-angiogenesis and anti-tumor activity. The kringle 1-3 gene was amplified by PCR technique using angiostatin gene as template. After DNA sequencing, the PCR product was cloned into pPIC9K resulting in recombinant plasmid pPIC9K13 which was then transformed into Pichia pastoris GS115. The high copy integration transformants screened by PCR and G418 methods were cultivated in flasks. The K1-3 was expressed and secreted to the medium and has immunogenic activity as shown by SDS-PAGE and Western blotting. High cell density culture was carried out in 30-liter and 80-liter bioreactor, the biomass reaches 300 OD after methanol induction, and the expressed product is 200 mg/L. The fermentation supernatant was purified by Streamline SP and Phenyl Sepharose Chromatography, the product appears as a single band on SDS-PAGE, with a purity of 95%-96%. The purified product has anti-angiogenesis and anti-tumor activity.
Texto completo:
1
Base de datos:
WPRIM
Asunto principal:
Farmacología
/
Pichia
/
Plásmidos
/
Plasminógeno
/
Proteínas Recombinantes
/
Clonación Molecular
/
Kringles
/
Reactores Biológicos
/
Fermentación
/
Genética
Límite:
Humans
Idioma:
Zh
Revista:
Chinese Journal of Biotechnology
Año:
2002
Tipo del documento:
Article