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Virology. 1991 Apr;181(2):768-72.

Analysis of rubella virus E1 glycosylation mutants expressed in COS cells.

Author information

1
Department of Pathology, University of British Columbia Research Center, Vancouver, Canada.

Abstract

cDNA clones encoding the envelope glycoprotein E1 of rubella virus (RV) were altered by site-directed mutagenesis at consensus sites for addition of N-linked glycans. The resulting plasmids were introduced into COS cells and the mutant E1 proteins were analyzed by indirect immunofluorescence, radioimmunoprecipitation, and immunoblotting. We found that RV E1 contains three N-linked oligosaccharides, each approximately 2 kDa in size. Although lack of glycosylation did not appear to affect targeting of E1 to the Golgi region, mutants lacking N-linked glycans at Asn 177 and Asn 209 failed to bind anti-E1 antibodies under nonreducing conditions. Our results suggest that glycosylation may be important for expression of important immunologic epitopes on RV E1.

PMID:
2014650
DOI:
10.1016/0042-6822(91)90915-x
[Indexed for MEDLINE]

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