摘要:
The present invention relates to methods for producing 2′ fucosyllactose (2′-FL), as well as newly identified fucosyltransferases, more specifically newly identified lactose binding α-1,2-fucosyltransferase polypeptides, and their applications. Furthermore, the present invention provides methods for producing 2-fucosyllactose (2′FL) using the newly identified α-1,2-fucosyltransferases.
摘要:
The invention provides compositions and methods for engineering E. coli or other host production bacterial strains to produce fucosylated oligosaccharides, and the use thereof in the prevention or treatment of infection.
摘要:
The invention provides compositions and methods for engineering E. coli or other host production bacterial strains to produce fucosylated oligosaccharides, and the use thereof in the prevention or treatment of infection.
摘要:
Disclosed is a method for improving the productivity of 2′-fucosyllactose (2′-FL) through enzymatic treatment. Lactose used as a substrate in the stationary phase during culture is degraded by treatment with a small amount of enzyme, the resulting glucose is consumed to produce guanosine diphosphate-L-fucose as a precursor of 2′-fucosyllactose, and the use of lactose left after culture can be maximally utilized for the production of 2′-fucosyllactose. As a result, it is possible to increase the productivity of 2′-fucosyllactose in an economically efficient manner because additional glucose is not required while minimizing by-products.
摘要:
The present invention relates to genetically engineered organisms, especially microorganisms such as bacteria and yeasts, for the production of added value bio-products such as specialty saccharide, activated saccharide, nucleoside, glycoside, glycolipid or glycoprotein. More specifically, the present invention relates to host cells that are metabolically engineered so that they can produce said valuable specialty products in large quantities and at a high rate by bypassing classical technical problems that occur in biocatalytical or fermentative production processes.
摘要:
The invention provides compositions and methods for engineering E. coli or other host production bacterial strains to produce fucosylated oligosaccharides, and the use thereof in the prevention or treatment of infection.
摘要:
The present invention provides a protein having α1,2-fucosyltransferase activity, a DNA encoding the protein, a recombinant DNA comprising the DNA, a transformant comprising the recombinant DNA, a process for producing the protein having α1,2-fucosyltransferase activity using the transformant, and a process for producing a fucose-containing complex carbohydrate using the transformant.
摘要:
The present invention is in the technical field of synthetic biology and metabolic engineering. More particularly, the present invention is in the technical field of metabolically engineered cells and use of said cells in a cultivation, preferably a fermentation. The present invention describes a cell and a method for production of a compound. The cell expresses an alpha-1,2-fucosyltransferase that has galactoside alpha-1,2-fucosyltransferase activity on the galactose residue of Gal-b1,3-GlcNAc (LNB, lacto-N-biose). Furthermore, the present invention provides for purification of said compound from the cultivation.
摘要:
A genetically engineered bacterium and a preparation method and use thereof are disclosed. The genetically engineered bacteria contain a gene encoding α-1,2-fucosyltransferase, and a gene encoding a protein tag is connected to the gene encoding α-1,2-fucosyltransferase; the protein tag is MBP, SUMO1, SUMO2 or TrxA, the amino acid sequence of the MBP is shown in SEQ ID NO: 2, the amino acid sequence of the SUMO1 is shown in SEQ ID NO: 3, the amino acid sequence of the SUMO2 is shown in SEQ ID NO: 4, the amino acid sequence of the TrxA is shown in SEQ ID NO: 5. Fermentation with the genetically engineered bacteria can greatly increase the yield of 2′-fucosyllactose compared to the genetically engineered bacteria that only expresses α-1,2-fucosyltransferase exogenously, and the yield can be more than doubled in a preferred case.
摘要:
The invention relates to a method for selective crystallization of 2′-fucosyllactose (2′-FL) from an aqueous solution comprising 2′-FL and one or more other fucosylated carbohydrates by adding acetic acid to the solution. The aqueous solution is separated from an aqueous culture medium prior to crystallization.