Purification and characterization of a new family 45 endoglucanase, STCE1, from Staphylotrichum coccosporum and its overproduction in Humicola insolens.
Abstract
In the detergent industry, fungal endoglucanases have been used to release microfibrils (defibrillation) from the surface of dyed cellulosic fabrics to enhance color brightness. Although endoglucanases for laundry use must have various properties, such as a neutral or alkaline optimum pH, resistance to anionic surfactants and oxidizing agents (main components in detergents), and high defibrillation activity, all-purpose endoglucanases have not been obtained yet. As a result of screening of endoglucanases, a new family 45 endoglucanase (family 45 glycoside hydrolase), designated STCE1, was obtained and purified to apparent homogeneity from the culture supernatant of Staphylotrichum coccosporum NBRC 31817. The molecular mass of STCE1 was 49 kDa. The optimum pH for the carboxymethyl cellulase activity of STCE1 was 6.0, and the optimum temperature was 60 degrees C. STCE1 was highly resistant to an anionic surfactant and an oxidizing agent. Furthermore, the defibrillation activities on dyed cotton and lyocell fabrics of STCE1 were higher than those of the other representative endoglucanases tested. These results indicate that STCE1 is an all-purpose enzyme for laundry use. A gene encoding STCE1, designated the stce1 gene, was cloned...Continue Reading
References
Purification and characterization of a new endo-1,4-beta-D-glucanase from Beltraniella portoricensis
Citations
Molecular characterization of a fungicidal endoglucanase from the cyanobacterium Calothrix elenkinii
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