Abstract
We have produced single-chain antibody fragments (scFv) in Saccharomyces cerevisiae at levels up to 20 mg/L in shake flask culture by a combination of expression level tuning and overexpression of folding assistants. Overexpression of the chaperone BiP or protein disulfide isomerase (PDI) increases secretion titers 2–8 fold for five scFvs. The increases occur for scFv expression levels ranging from low copy to ER-saturating overexpression. The disulfide isomerase activity of PDI, rather than its chaperone activity, is responsible for the secretion increases. A synergistic increase in scFv production occurs upon coover-expression of BiP and PDI.
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Shusta, E., Raines, R., Plückthun, A. et al. Increasing the secretory capacity of Saccharomyces cerevisiae for production of single-chain antibody fragments. Nat Biotechnol 16, 773–777 (1998). https://doi.org/10.1038/nbt0898-773
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DOI: https://doi.org/10.1038/nbt0898-773
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