| 摘要 |
Disclosed are methods for reducing detectable mannosylation of N-linked and O-linked oligosaccharides in lower eukaryote host cells. In particular, recombinant lower eukaryote host cells are provided in which expression of the GDP-mannose transporter encoded by the Vanadate Resistant Glycosylation 4 (VRG4) gene has been disrupted. In general, the VRG4 gene is essential for cell viability; however, the present invention provides host cells that are viable when expression of the VRG4 gene therein has been disrupted. The host cells are capable of producing proteins or glycoproteins that have reduced or no detectable α-linked mannose, &bgr;-linked mannose or phosphomannose containing N- and/or O-glycans. |
