Expression of Tkermomonoepora fusea Exoglucanase in Saccharomyces cerevisiae and Its Application to Cellulose Hydrolysis

Saccharomyces cerevisiae에서 Tkermomonospora fusca Exoglucanase의 발현 및 Cellulose분해에의 응용

  • Park Hyun-Soon (Department of Biotechnology & Bioengineering, Pukyung National University) ;
  • Kim Hyun-Chul (Biomaterial Control, Dong-Eui University) ;
  • Shin Dong-Ha (Insect Biotech Co.) ;
  • Kim Joong-Kyun (Department of Biotechnology & Bioengineering, Pukyung National University) ;
  • Nam Soo-Wan (Department of Biotechnology & Bioengineering, Dong-Eui University)
  • 박현순 (부경대학교 생물공학과) ;
  • 김현철 (동의대학교 바이오물질제어학과) ;
  • 신동하 ((주)인섹트바이오텍) ;
  • 김중균 (부경대학교 생물공학과) ;
  • 남수완 (동의대학교 생명공학과)
  • Published : 2005.12.01


To develop effective and powerful probiotic, Saccharomyces cerevisiae strains producing cellulolytic enzymes were genetically brooded. For the production of exoglucanase, the plasmid pVT-TExo (8.8 kb) was constructed, in which Thermomonosporafusca exoglucanase gene (E3) was under the control of ADHl promoter, and introduced into S. cerevisiae SEY2102. When the transformant, S. cerevisiae SEY2102/pVT-TExo, was cultivated on YPD medium, the total expression level of avicelase reached about 190 unit/l. The secretion efficiency and plasmid stability were about $50\%\;and\;91\%$, respectively. Recombination exoglucanase enzyme bound to avicel better than Clostridium endoglucanase (CelA) and Trichoderma endoglucanase (C4) enzymes. The mixing ratio of E3 and CelA displaying the best synergistic hydrolysis for avicel was observed at 4:1. The mixture of endoglucanase (CelA) and exoglucanase (E3) resulted in 3.2-fold increase of avicelase activity and 2.5-fold enhanced production of sugar production from avicel, compared to the single enzyme treatment.


Saccharomyces cerevisiae;exoglucanase;endoglucanase synergistic hydrolysis;cellulose


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