Construction of recombinant Yarrowia lipolytica and its application in bio-transformation of lignocellulose

Bioengineered

Xiao-Qing Xu¹  Zi-Lu Liu¹  Wu-Cheng Xia¹  Ding-kang Liu¹  Yi-Min Yang¹  Wen-Jing Xiao¹  Chao-Ying Wang¹  Hui-Ting Song²  Xiao Yu²  Zheng-Bing Jiang³ 

[1] Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei University, Wuhan, Chin;Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei University, Wuhan, Chin;College of Resources and Environmental Science, Hubei University, Wuhan, Chin;Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei University, Wuhan, Chin;Hubei Key Laboratory of Industrial Biotechnology, College of Life Science, Hubei University, Wuhan, Chin;

关键词: cellulosic feed;    lignocellulose;    microbial fermentation;    single cell protein;    Yarrowia lipolytica;   

DOI  :  10.1080/21655979.2017.1293219

来源: Taylor & Francis

【 摘 要 】

Lignocellulose is a polysaccharide and an abundant biomass resource that widely exists in grains, beans, rice, and their by-products. Over 10 million tons of lignocellulose resources and processing products are produced every year in China. Three recombinant Y. lipolytica strains with cellulase (β-glucosidase, endoglucanase and cellobiohydrolase) were constructed. The enzymatic activities of these enzymes were 14.181 U/mL, 16.307 U/mL, and 17.391 U/mL, respectively. The whole cell cellulases were used for a stover bio-transformation. The celluloses in the stover were partly degraded by the cellulases, and the degradation products were transformed into single cell protein (SCP) by the Y. lipolytica cells. After 15 d of fermentation with the whole cell cellulases, the protein content of the maize stover and the rice straw reached 16.23% and 14.75%, which increased by 168.26% and 161.52% compared with the control, respectively. This study provides a new stage for the efficient utilization of stover in the feed industry.

【 授权许可】

Unknown