Expression of a heterologous laccase by Aspergillus niger cultured by solid-state and submerged fermentations

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• 作者：A. Té ; llez-Jurado ; A. Arana-Cuenca ; A.E. Gonzá ; lez Becerra ; G. Viniegra-Gonzá ; lez and O. Loera
• 关键词：Aspergillus niger ; Laccase ; Heterologous protein ; Solid-state fermentation ; Catabolic repression
• 刊名：Enzyme and Microbial Technology
• 出版年：2006
• 出版时间：2 March 2006
• 年：2006
• 卷：38
• 期：5
• 页码：665-669
• 全文大小：184 K

文摘

Laccase gene IV from Trametes versicolor was inserted by REMI in Aspergillus niger C28B25. One selected transformant (C28eco3) was subjected to a second round of transformation and a new transformant was isolated (C28eco3–13). Laccase production was compared for these strains in submerged fermentation (SmF) and solid-state fermentation (SSF) using glucose or maltodextrin at different concentrations (10, 50 and 100 g/L). Enzymes yields were higher with glucose as a carbon source. However, repression of laccase was evident for SmF after increasing glucose from 10 to 50 g/L. In contrast, in SSF glucose at 50 g/L allowed the production of the highest laccase activity for strain C28eco3 (362 U/L) and C28eco3–13 (592 U/L). Advantages of SSF as an expression and production system over SmF are also discussed.