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. 1980 Dec;77(12):7277–7281. doi: 10.1073/pnas.77.12.7277

Distribution of virus structural proteins and protein-protein interactions in plasma membrane of baby hamster kidney cells infected with Sindbis or vesicular stomatitis virus.

H Scheefers, U Scheefers-Borchel, J Edwards, D T Brown
PMCID: PMC350485  PMID: 6261249

Abstract

The plasma membrane of baby hamster kidney (BHK-21) cells infected with either Sindbis or vesicular stomatitis virus was isolated by a technique involving the ingestion of latex beads by the cells. Plasma membrane isolated from Sindbis virus-infected cells contained only one (E1) of the three (E1, E2, and C) structural proteins of this virus. When the latex beads were pretreated with either polylysine or DEAE-dextran, plasma membrane obtained from Sindbis virus-infected cells contained all three structural proteins and PE2, a precursor to one of the structural proteins. In pulse-chase radiolabeling experiments with Sindbis virus-infected cells, it was possible to follow the appearance of the precursor protein (PE2) i the plasma membrane and its eventual conversion to E2. The appearance of Sindbis virus membrane proteins PE2 and E1 in the purified plasma membrane was not affected by the drug tunicamycin, an inhibitor of glycosylation. These experiments imply the following: (i) Cleavage of the Sindbis virus precursor polypeptide PE2 to E2 is not a prerequisite for its transport to the cell plasma membrane; (ii) transport of virus membrane proteins to the cell surface does not depend on glycosylation; and (iii) although all Sindbis virus structural proteins are associated with the plasma membrane, a generally accepted pairing of PE2-E1 or E2-E1 in the plasma membrane either does not exist or, if it does exist, involves a very weak interaction. The procedures used in this study also resulted in the successful isolation of plasma membrane from vesicular stomatitis virus-infected cells containing the glycoprotein, the matrix protein, and the nucleocapsid protein, a result that suggests that these proteins are located on the media side of baby hamster kidney cells grown in monolayer.

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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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