Streamlining homogeneous glycoprotein production for biophysical and structural applications by targeted cell line development.
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Owens, Raymond J
Heinz, Dirk W
van den Heuvel, Joop
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AbstractStudying the biophysical characteristics of glycosylated proteins and solving their three-dimensional structures requires homogeneous recombinant protein of high quality.We introduce here a new approach to produce glycoproteins in homogenous form with the well-established, glycosylation mutant CHO Lec18.104.22.168 cells. Using preparative cell sorting, stable, high-expressing GFP 'master' cell lines were generated that can be converted fast and reliably by targeted integration via Flp recombinase-mediated cassette exchange (RMCE) to produce any glycoprotein. Small-scale transient transfection of HEK293 cells was used to identify genetically engineered constructs suitable for constructing stable cell lines. Stable cell lines expressing 10 different proteins were established. The system was validated by expression, purification, deglycosylation and crystallization of the heavily glycosylated luminal domains of lysosome-associated membrane proteins (LAMP).
CitationStreamlining homogeneous glycoprotein production for biophysical and structural applications by targeted cell line development. 2011, 6 (12):e27829 PLoS ONE
AffiliationDepartment of Molecular Structural Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
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