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Purification and characterization of a chitinase from Bombyx mori / 生物工程学报
Chinese Journal of Biotechnology ; (12): 404-409, 2010.
Artículo en Chino | WPRIM | ID: wpr-336212
ABSTRACT
The importance of chitinases in the physiological and developmental processes of fungi and insects makes themselves and their inhibitors important targets for biological pesticides. A chitinase was isolated from Bombyx mori and purified to electrophoretic homogeneity by ammonium sulfate precipitation and Sephadex G-150 column chromatography. The molecular mass was estimated to be about 88 kDa by SDS-PAGE, while the K(m) was calculated to be 22.3 micromol/L. Moveover, the optimal reaction temperature was 45 degrees C, and the optimum pH was 6.0. The effect of metal ions and organic reagents on chitinase activity was investigated. The activity was enhanced by high concentration of Mn2+, while was strongly inhibited by Cu2+ and SDS. These results provide a basis for screening the chitinase-based biological pesticide.
Asunto(s)
Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Bombyx / Temperatura / Estabilidad de Enzimas / Quitinasas / Proteínas de Insectos / Metabolismo Límite: Animales Idioma: Chino Revista: Chinese Journal of Biotechnology Año: 2010 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Bombyx / Temperatura / Estabilidad de Enzimas / Quitinasas / Proteínas de Insectos / Metabolismo Límite: Animales Idioma: Chino Revista: Chinese Journal of Biotechnology Año: 2010 Tipo del documento: Artículo