1887

Abstract

The fusion (F) protein of Sendai vims was expressed with a baculovirus system in insect cells. The F protein is synthesized in its uncleaved form F, which appears in SDS-containing gels as two bands with values of 66K and 64K. Digestion of the F protein with endo-glycosidase H revealed that the 66K species contains high mannose-type carbohydrates, whereas partially processed oligosaccharides are attached to the 64K species. Pulse-chase experiments showed that the F protein is initially synthesized as its 66K form. After 1 h of chase this precursor glycoprotein is partially converted to the 64K species and exposed at the cell surface. Other modifications of the F protein in insect cells are the formation of intramolecular disulphide linkages and oligomerization. However, processing and plasma membrane transport of the F protein in insect cells are incomplete and retarded compared to the F protein synthesized in Sendai virus-infected mammalian cells.

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1994-05-01
2022-05-28
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