期刊
JOURNAL OF BIOTECHNOLOGY
卷 257, 期 -, 页码 192-198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2016.11.033
关键词
2 '-Fucosyllactose; Engineered Escherichia coli; alpha-1,2-Fucosyllactose; Wcfb
资金
- Advanced Biomass R&D Center (ABC) of Global Frontier Project - Ministry of Schience, ICT and Future Planning and Danish Research Council [2011-0031359, 0652-20140008]
2 '-Fucosyllactose (2-FL) is one of most abundant oligosaccharides in human milk, which is involved in many biological functions for infant health. Since 2-FL has a great potential in application to functional food materials and pharmaceuticals, several microbial systems for mass production of 2-FL have been developed in recent years. Microbial production of 2-FL was suggested to be influenced by a number of factors including fucosylation activity of alpha-1,2-fucosyltransferase. In the present study, the wcfB gene coding for alpha-1,2-fucosyltransferase from Bacteroides fragilis was screened from eleven candidates of putative alpha-1,2-fucosyltransferase. Introduction of the wcfB gene allows the lacZ-deleted strain of E. coli expressing the genes for guanosine 5'-diphosphate (GDP)-l-fucose biosynthetic enzymes to produce 2-FL. As a result of fed-batch fermentation, 15.4g/L extracellular concentration of 2-FL with 2-FL yield of 0.858g/g lactose and productivity of 0.530g/L/h were obtained. In addition, the feasibility of industrial production of 2-FL using this microbial system was demonstrated by performing fed-batch fermentation in a 75L bioreactor. (C) 2016 Elsevier B.V. All rights reserved.
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