摘要:
The present invention provides a novel β -galactoside- α 2,3-sialyltransferase and a nucleic acid encoding the sialyltransferase. The present invention also provides a microorganism producing the sialyltransferase, as well as a method for producing the sialyltransferase using such a microorganism. The present invention further provides a vector carrying a nucleic acid encoding the sialyltransferase, and a host cell transformed with the vector, as well as a method for producing a recombinant β- galactoside- α 2, 3-sialyltransferase. The present invention further provides a method for preparing a sialylsugar chain, which uses the sialyltransferase of the present invention.
摘要:
The present invention relates to a protein having a β-galactoside-α2,3-sialyltransferase activity but substantially not having any neuraminidase activity, a nucleic acid encoding the enzyme protein, and a method of producing the enzyme using a microorganism transformed with a gene encoding the protein. The protein of the present invention is a modified-type enzyme protein produced by mutating a specific amino acid residue in a β-galactoside-α2,3-sialyltransferase protein derived from a microorganism belonging to the genus Photobacterium of the family Vibrionaceae and thereby substantially inactivating the neuraminidase activity of the protein.
摘要:
The present invention relates to a genetically modified cell line with reduced expression of GnTIVa/b and/or GnTV, a method for the production of glycoproteins having N-glycans with a reduced number of tri- and/or tetra-antennary N-glcyans using said cell line, and respective glycoproteins.
摘要:
The present invention relates to methods for reducing antennary fucosylation of complex N-glycans in recombinantly expressed glycoproteins by overexpressing alpha-2,6-sialytransferase 1 (ST6Gal1) and/or alpha-2,3-sialytransferase 4 (ST3Gal4) along withsaid glycoprotein. Cell lines that can be used in said methods, respective recombinant glycoproteins, and methods for expressing the same are also disclosed.
摘要:
The present invention relates to recombinant glycoproteins having highly or fully sialylated O-linked GalNAc glycans (GalNAc O-glycans), preferably core 1 GalNAc O-glycans, as well as cell lines that are genetically modified to overexpress a β-galactoside α-2,3-sialyltransferase 1 (ST3Gal1), preferably human ST3Gal1, which can be used for the production of said recombinant glycoproteins. Further, the present invention relates to respective methods of expressing recombinant glycoproteins, methods of increasing the degree of sialylation of recombinant glycoproteins, and methods of decreasing the micro-heterogeneity of GalNAc O-glycans. Finally, the present invention relates to respective uses of the above cell lines for the production of recombinant glycoproteins, for increasing the degree of sialylation of recombinant glycoproteins, and for decreasing the micro-heterogeneity of O-linked GalNAc glycans of recombinant glycoproteins.
摘要:
A host cell characterized in that it comprises integrated into its genome a sequence coding for the a chain of hCG, and use of the host cell to produce recombinant hCG.
摘要:
The present invention relates to recombinant glycoproteins having highly or fully sialylated O-linked GalNAc glycans (GalNAc O-glycans), preferably core 1 GalNAc O-glycans, as well as cell lines that are genetically modified to overexpress a ²-galactoside ±-2,3-sialyltransferase 1 (ST3Gal1), preferably human ST3Gal1, which can be used for the production of said recombinant glycoproteins. Further, the present invention relates to respective methods of expressing recombinant glycoproteins, methods of increasing the degree of sialylation of recombinant glycoproteins, and methods of decreasing the micro-heterogeneity of GalNAc O-glycans. Finally, the present invention relates to respective uses of the above cell lines for the production of recombinant glycoproteins, for increasing the degree of sialylation of recombinant glycoproteins, and for decreasing the micro-heterogeneity of O-linked GalNAc glycans of recombinant glycoproteins.
摘要:
The present invention relates to a genetically modified cell line with reduced expression of GnTIVa/b and/or GnTV, a method for the production of glycoproteins having N-glycans with a reduced number of tri- and/or tetra-antennary N-glcyans using said cell line, and respective glycoproteins.
摘要:
The invention described herein generally relates to glycoengineering host cells for the production of glycoproteins for therapeutic use. Host cells are modified to express biosynthetic glycosylation pathways. Novel prokaryotic host cells are engineered to produce N -linked glycoproteins wherein the glycoproteins comprise polysialic acid or blood group antigens.