N-glycosylation of a baculovirus-expressed recombinant glycoprotein in three insect cell lines

In Vitro Cellular & Developmental Biology. Animal
P C KulakoskyH A Wood

Abstract

The capacity of two Trichoplusia ni (TN-368 and BTI-Tn-5b 1-4) and a Spodoptera frugiperda (IPLB-SF-21A) cell lines to glycosylate recombinant, baculovirus-encoded, secreted, placental alkaline phosphatase was compared. The alkaline phosphatase from serum-containing, cell culture medium was purified by phosphate affinity column chromatography. The N-linked oligosaccharides were released from the purified protein with PNGase F and analyzed by fluorophore-assisted carbohydrate electrophoresis. The majority of oligosaccharide structures produced by the three cell lines contained two or three mannose residues, with and without core fucosylation, but there were structures containing up to seven mannose residues. The oligosaccharides that were qualitatively or quantitatively different between the cell lines were sequenced with glycosidase digestions. The S. frugiperda cells produced more fucosylated oligosaccharides than either of the T. ni cell lines. The smallest oligosaccharide produced by S. frugiperda cells was branched trimannose. In contrast, both T. ni cell lines produced predominantly dimannose and linear trimannose structures devoid of alpha 1-3-linked mannose.

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Citations

Oct 6, 1999·Current Opinion in Biotechnology·T A Kost, J P Condreay
Jul 31, 2003·Biotechnology and Bioengineering·Christoph E JoostenMichael L Shuler
Feb 23, 2002·Protein Expression and Purification·Shaoxian SunRichard Wynn
Jun 29, 2011·Journal of Insect Physiology·Yipeng XuMaria Enrica Pasini
May 28, 2003·Biotechnology and Bioengineering·Shannon F KramerWilliam E Bentley
Aug 20, 2003·Accounts of Chemical Research·Noboru TomiyaYuan C Lee

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