Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Expression of Schwanniomyces occidentalis $\alpha-Amylase$ Gene in Saccharomyces cerevisiae var. diastaticus

  • Park, Jeong-Nam (Departments of Microbiology and Biology, Chonnam National University) ;
  • Shin, Dong-Jun (Departments of Microbiology and Biology, Chonnam National University) ;
  • Kim, Hee-Ok (Departments of Microbiology and Biology, Chonnam National University) ;
  • Kim, Dong-Ho (Protein Function R. U., Korea Research Institute of Bioscience and Biotechnology) ;
  • Lee, Hwang-Hee (The Institute of Basic Sciences, Chonnam National University) ;
  • Chun, Soon-Bai (Departments of Microbiology and Biology, Chonnam National University) ;
  • Bai, Suk (Departments of Microbiology and Biology, Chonnam National University)
  • Published : 1999.10.01
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Abstract

The gene encoding Schwanniomyces occidentalis $\alpha-amylase$(AMY) was introduced into Saccharomyces cerevisiae var. diastaticus which secreted only glucoamylase, by using a linearized yeast integrating vector to develop stable strains with a capability of secreting $\alpha-amylase$and glucoamylase simultaneously. A dominant selectable marker, the geneticin(G418) resistance gene (Gt^r$), was cloned into a vector to screen wild-type diploid transformants harboring the AMY gene. The amylolytic activities of transformants were about 3-7 times higher than those of the recipient strains. When grown in nonselective media, the transformants with the linearized integrating vector containing the AMY gene exhibited almost all of the mitotic stability after 100 generations.

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References

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