Abstract:
A method is described for producing protein compositions having reduced amounts of O-linked glycosylation. The method includes producing the protein in cells cultured in the presence of one or more α-1,2-mannosidases from Coccidiodes immitis, Coccidiodes posadasii, Penicillium citrinum, Magnaporthe grisea, Aspergillus saitoi, Aspergillus oryzae, and Chaetomiun globosum or a catalytically active fragment of said α-1,2-mannosidase.
Abstract:
Methods for display of recombinant whole immunoglobulins or immunoglobulin libraries on the surface of eukaryote host cells, including yeast and filamentous fungi, are described. The methods are useful for screening libraries of recombinant immunoglobulins in eukaryote host cells to identify immunoglobulins that are specific for an antigen of interest.
Abstract:
Methods for display of recombinant whole immunoglobulins or immunoglobulin libraries on the surface of eukaryote host cells, including yeast and filamentous fungi, are described. The methods are useful for screening libraries of recombinant immunoglobulins in eukaryote host cells to identify immunoglobulins that are specific for an antigen of interest.
Abstract:
The present invention provides a novel lower eukaryotic host cell producing human-like glycoproteins characterized as having a terminal β-galactose residue and essentially lacking fucose and sialic acid residues. The present invention also provides a method for catalyzing the transfer of a galactose residue from UDP-galactose onto an acceptor substrate in a recombinant lower eukaryotic host cell, which can be used as a therapeutic glycoprotein.
Abstract:
The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified lipid-linked oligosaccharides are created or selected. N-glycans made in the engineered host cells exhibit GnTIII activity, which produce bisected N-glycan structures and may be modified further by heterologous expression of one or more enzymes, e.g., glycosyltransferases, sugar transporters and mannosidases, to yield human-like glycoproteins. For the production of therapeutic proteins, this method may be adapted to engineer cell lines in which any desired glycosylation structure may be obtained.
Abstract:
The present invention relates to immunoglobulin glycoprotein compositions having predominant N-glycan structures on an immunoglobulin glycoprotein which confer a specific effector function. Additionally, the present invention relates to pharmaceutical compositions comprising an antibody having a particular enriched N-glycan structure, wherein said N-glycan structure is selected from the group consisting of Man7GlcNAc2 and Man8GlcNAc2.
Abstract:
The present invention relates to immunoglobulin glycoprotein compositions having predominant N-glycan structures on an immunoglobulin glycoprotein which confer a specific effector function. Additionally, the present invention relates to pharmaceutical compositions comprising an antibody having a particular enriched N-glycan structure, wherein said N-glycan structure is Gal2GlcNAc2Man3GlcNAc2 lacking fucose.
Abstract:
The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities such as those involved in glycosylation to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified oligosaccharides are created or selected. N-glycans made in the engineered host cells have a Man5GlcNAc2 core structure which may then be modified further by heterologous expression of one or more enzymes, e.g., glycosyltransferases, sugar transporters and mannosidases, to yield human-like glycoproteins. For the production of therapeutic proteins, this method may be adapted to engineer cell lines in which any desired glycosylation structure may be obtained.
Abstract:
The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities such as those involved in glycosylation to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified oligosaccharides are created or selected. N-glycans made in the engineered host cells have a Man5GlcNAc2 core structure which may then be modified further by heterologous expression of one or more enzymes, e.g., glycosyltransferases, sugar transporters and mannosidases, to yield human-like glycoproteins. For the production of therapeutic proteins, this method may be adapted to engineer cell lines in which any desired glycosylation structure may be obtained.
Abstract translation:本发明涉及具有修饰的寡糖的真核宿主细胞,其可以通过异源表达一组糖基转移酶,糖转运体和甘露糖苷酶进一步修饰,以成为用于产生哺乳动物例如人治疗性糖蛋白的宿主菌株。 本发明提供核酸分子和组合文库,其可用于成功靶向和表达哺乳动物酶活性,例如参与糖基化的真核宿主细胞中的细胞内区室的那些。 该方法提供了可用于表达和靶向参与糖基化的任何所需基因的工程化宿主细胞。 建立或选择具有修饰寡糖的宿主细胞。 在工程化的宿主细胞中制备的N-聚糖具有可以通过异源表达一种或多种酶(例如糖基转移酶)而进一步修饰的Man III / 糖转运蛋白和甘露糖苷酶,以产生人样糖蛋白。 为了生产治疗性蛋白质,该方法可适用于工程化可能获得任何所需糖基化结构的细胞系。
Abstract:
The present invention relates to the elimination of mannosylphosphorylation on the glycans of glycoproteins in the yeast genus Pichia. The elimination of mannosylphosphorylated glycoproteins results from the disruption of the PNO1 gene and the newly isolated P. pastoris MNN4B gene. The present invention further relates to methods for producing modified glycan structures in host cells that are free of glycan mannosylphosphorylation.