期刊
3 BIOTECH
卷 7, 期 -, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s13205-017-0672-2
关键词
Glucose tolerance; Cellulase; beta-Glucosidase; Intermedia inhibition
资金
- National Natural Science Foundation of China [20772046, 21072075]
- High-end technology innovation platform of straw comprehensive utilization of colleges and universities in Jilin province [(2014) C-1]
Thermophilic enzymes have many potential benefits in industrial production with increased flexibility related to process configurations. A thermostable beta-glucosidase from Thermotoga naphthophila RUK-10 was found to possess catalytic activity for cellobiose hydrolysis with a high potential for application in biomass conversion. The aggregation of cellobiose often has an inhibitory effect on cellobiohydrolases and endoglucanases during cellulose hydrolysis. The presence of beta-glucosidases has a significant effect on reducing inhibition from hydrolytic products by hydrolysing the intermedia cellobiose. In this study, beta-glucosidase TN0602 exhibited a high tolerance to glucose and high thermostability even after a long incubation (>72 h). Additionally, supplementing beta-glucosidase TN0602 with microcrystalline cellulose, untreated corn straw and steam-exploded corn straw hydrolysis reactions containing a commercial cellulase led to an increased conversion rate in released glucose compared to hydrolysis without the addition of beta-glucosidase (15.82, 30.62 and 35.21%, respectively); the increase of conversion rates were 61.86, 93.50 and 94.55%. It was thus shown that an obvious synergistic effect exists between TN0602 and cellulases for cellulose hydrolysis, suggesting its potential as a component of enzymatic cocktails for the conversion of lignocellulosic biomass to other chemicals.
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