ISSN:
0749-503X
Keywords:
Poliovirus
;
subviral particles
;
posttranslational cleavage
;
heterologous gene expression
;
Saccharomyces cerevisiae
;
Life and Medical Sciences
;
Genetics
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
Notes:
The sequence of the poliovirus genome encoding 3CD (a protease) was transferred to the yeast Saccharomyces cerevisiae on expression vectors with either a constitutive or an inducible promoter. Transformants could only be obtained with vectors carrying the inducible transcription unit. Extracts of induced cells were able to cleave cell-free synthesized P1, the precursor of the poliovirus capsid proteins, into VP0, VP3 and VP1.In yeast cells constitutively expressing P1, induction of 3CD expression resulted in only trace amounts of processed products. Processing could be improved considerably by simultaneous induction of both P1 and 3CD expression. Analysis of extracts of such induced cells revealed the presence of particles that resembled authentic subviral particles.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/yea.320100706
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