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. 1976 Jan;17(1):239–246. doi: 10.1128/jvi.17.1.239-246.1976

Growth of Enveloped RNA Viruses in a Line of Chinese Hamster Ovary Cells with Deficient N-Acetyl-glucosaminyltransferase Activity

Sondra Schlesinger 1, Charlene Gottlieb 1, Paul Feil 1, Nancy Gelb 1, Stuart Kornfeld 1
PMCID: PMC515408  PMID: 173886

Abstract

Sindbis and vesicular stomatitis viruses were grown in a line (termed 15B) of Chinese hamster ovary (CHO) cells that is deficient in a specific UDP-N-acetylglucosamine:glycoprotein N-acetylglucosaminyltransferase. Both viruses replicated normally in the cell line, but the glycoproteins of the released virus migrated faster on sodium dodecyl sulfate-polyacrylamide gels than did glycoproteins of virus grown in parent CHO cells. Digestion of the viral glycoproteins with Pronase followed by gel filtration demonstrated that the glycopeptides of Sindbis-15B virus were much smaller than the glycopeptides of Sindbis-CHO virus. In addition, Sindbis-15B viral glycopeptides but not Sindbis-CHO viral glycopeptides contained terminal α-mannose residues as shown by their susceptibility to α-mannosidase digestion. These findings demonstrate that the oligosaccharide units of the glycoproteins of vesicular stomatitis and Sindbis viruses are altered when the viruses are grown in 15B cells. We conclude that the N-acetylglucosaminyltransferase that is missing in 15B cells normally participates in the biosynthesis of the oligosaccharide units of the viral glycoproteins, and in the absence of this enzyme incomplete oligosaccharide chains are produced. Viruses released from 15B cells appear to retain full infectivity; Sindbis-15B virus, however, showed a significant decrease in hemagglutination titer compared with that of Sindbis-CHO virus.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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