Construction of recombinant Yarrowia lipolytica and its application in bio-transformation of lignocellulose.
Bioengineered
; 8(5): 624-629, 2017 Sep 03.
Article
em En
| MEDLINE
| ID: mdl-28282268
ABSTRACT
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 (ß-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.
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Base de dados:
MEDLINE
Assunto principal:
Recombinação Genética
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Oryza
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Yarrowia
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Celulases
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Engenharia Metabólica
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Lignina
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article