Abstract
Expression of the genes encoding several peroxisomal enzymes of the n-alkane-utilizable yeast Candida tropicalis has been examined in Saccharomyces cerevisiae to find out a novel and foreign promoter functional in S. cerevisiae. Among these genes, two malate synthase genes, as well as the isocitrate lyase gene, were strongly expressed in acetate-grown cells of S. cerevisiae. The amounts of the recombinant malate synthases expressed in S. cerevisiae were as much as 30% of the total amount of soluble proteins in the cells. These results showed that the upstream regions (1.1 kbp for the MS-1 gene and 0.8 kbp for the MS-2 gene) of the malate synthase genes [ UPR-MSs] from C. tropicalis contained strong promoters functional in S. cerevisiae and that the construction of novel gene expression systems using UPR-MSs might be possible.
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