Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Increase of Yeast Survival under Oxidative Stress by the Expression of the Laccase Gene from Coprinellus congregatus

  • Kim, Dong-Sik (Molecular Microbiology Lab, Department of Biochemistry, Division of Life Sciences, Kangwon National University) ;
  • Kwak, Eun-Jung (Molecular Microbiology Lab, Department of Biochemistry, Division of Life Sciences, Kangwon National University) ;
  • Choi, Hyoung-T. (Molecular Microbiology Lab, Department of Biochemistry, Division of Life Sciences, Kangwon National University)
  • Published : 2006.12.31
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Abstract

Coprinellus congregatus secreted a laccase isozyme when the culture was transferred to an acidic liquid medium (pH 4.1). The laccase cDNA gene (clac2) was used as a probe for cloning of the genomic laccase gene (lac2) including the promoter (Plac2). The open reading frame (ORF) of lac2 had 526 deduced amino acids and four conserved copper binding domains as other fungal laccases. Recombinant plasmid (pRSlac2p-cDNA) of lac2 cDNA with its own promoter was transformed in Saccharomyces cerevisiae. Expression of the transformed lac2 gene was induced by oxidative stress ($H_2O_2$) in yeast and the survival rate of the transformed yeast strain was greatly increased when compared with that of the control strain transformed with pRS316 yeast vector.

Keywords

References

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