Abstract
An expression and secretion system for scytalidopepsin B, an acid protease from Scytalidium lignicolum, was constructed in yeast. Saccharomyces cerevisiae AH22 was transformed with an yeast-E. coli shuttle vector, pAM82, in which an yeast invertase signal segment and the cDNA encoding the pro- and mature enzyme regions were inserted. The transformant was found to secret a pepstatin-insensitive acid protease, when cultured aerobically in a low phosphate (Pi) medium. Amino terminal amino acid sequencing analysis indicated that the recombinant acid protease was accurately processed and secreted as a mature form.
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