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. 1989 Dec;55(12):3167-72.
doi: 10.1128/aem.55.12.3167-3172.1989.

Cloning and Expression of a Schwanniomyces occidentalis alpha-Amylase Gene in Saccharomyces cerevisiae

T T Wang  1 , L L Lin, W H Hsu
Affiliations

Cloning and Expression of a Schwanniomyces occidentalis alpha-Amylase Gene in Saccharomyces cerevisiae

T T Wang et al. Appl Environ Microbiol. 1989 Dec.

Abstract

An alpha-amylase gene (AMY) was cloned from Schwanniomyces occidentalis CCRC 21164 into Saccharomyces cerevisiae AH22 by inserting Sau3AI-generated DNA fragments into the BamHI site of YEp16. The 5-kilobase insert was shown to direct the synthesis of alpha-amylase. After subclones containing various lengths of restricted fragments were screened, a 3.4-kilobase fragment of the donor strain DNA was found to be sufficient for alpha-amylase synthesis. The concentration of alpha-amylase in culture broth produced by the S. cerevisiae transformants was about 1.5 times higher than that of the gene donor strain. The secreted alpha-amylase was shown to be indistinguishable from that of Schwanniomyces occidentalis on the basis of molecular weight and enzyme properties.

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