Chen Y, et al. (1994) Overexpression of the gene for polyubiquitin in yeast confers increased secretion of a human leucocyte protease inhibitor. Biotechnology (N Y) 12(8):819-23
Abstract: We have found an influence of cellular ubiquitin levels over the secretion of human leucocyte elastase inhibitor (elafin) by Saccharomyces cerevisiae. Inactivation of the UBI4 polyubiquitin gene reduced elafin secretion 3 to 4-fold. Conversely ubiquitin overexpression, by galactose induction of an integrated UBI4 gene under GAL1 promoter control, enhanced elafin secretion 7-fold compared to cells wild-type for ubiquitin genes. This influence of ubiquitin levels is exerted at a post-transcriptional step in elafin gene expression, and may represent a chaperone-like action. Ubiquitin overexpression did not affect production of alpha-factor and of certain natural yeast extracellular enzymes even though appreciable free ubiquitin became associated with the yeast periplasm.
|Status: Published||Type: Journal Article||PubMed ID: 7765022|
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