Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/107683
Title: Expression of the dengue virus structural proteins in Pichia pastoris leads to the generation of virus-like particles
Authors: Sugrue, R.J. 
Fu, J. 
Howe, J.
Chan, Y.-C. 
Issue Date: Aug-1997
Source: Sugrue, R.J.,Fu, J.,Howe, J.,Chan, Y.-C. (1997-08). Expression of the dengue virus structural proteins in Pichia pastoris leads to the generation of virus-like particles. Journal of General Virology 78 (8) : 1861-1866. ScholarBank@NUS Repository.
Abstract: We have expressed cDNA encoding the dengue virus structural proteins in Pichia pastoris by chromosomal integration of an expression cassette containing the dengue virus structural genes (CprME). The yeast recombinant E protein migrated during SDS-PAGE as a 65 kDa protein when analysed by Western blotting and radioimmunoprecipitation, which is the expected molecular mass for correctly processed and glycosylated E protein. Treatment with endoglycosidases showed that the recombinant E protein was modified by the addition of short mannose chains. The E protein migrated with a buoyant density of 1.13 g/cm3 when analysed using sucrose density gradient centrifugation. Spherical structures with an average diameter of 30 nm, whose morphology resembles dengue virions, were observed in the purified fractions using transmission electron microscopy. Furthermore, the virus-like particles were immunogenic in animals and were able to induce neutralizing antibodies. This is the first report that expression of the structural genes of a flavivirus in yeast is able to generate particulate structures that resemble virions.
Source Title: Journal of General Virology
URI: http://scholarbank.nus.edu.sg/handle/10635/107683
ISSN: 00221317
Appears in Collections:Staff Publications

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