한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)

  • 제25권4호
  • /
  • Pages.346-353
  • /
  • 1997
  • /
  • 1598-642X(pISSN)
  • /
  • 2234-7305(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
권호 표지

Cellulose 분해효소를 분비하는 Trichoderma sp. C-4 균주의 분리 및 특성

  • 손영준 (울산대학교 미생물학과) ;
  • 설옥주 (울산대학교 미생물학과) ;
  • 정대균 (경희대학교 유전공학과 및 유전공학연구소) ;
  • 한인섭 (울산대학교 미생물학과) ;
  • 최윤재 (서울대학교 동물자원학과) ;
  • 정춘수 (울산대학교 미생물학과)
  • 발행 : 1997.08.01
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초록

During the screening of cellulase producing microorganisms, a fungal strain C-4 was selected from etiolated leaves. Based on taxonomic studies, the fungus could be classified as a strain of Trichoderma sp. When the strain C-4 was cultured in Mandels' media at 28$circ$C for 6 days, the enzyme activities detected in broth were as follows: 8.2 U/ml (28.1 U/mg) of CMCase activity, 0.75 U/ml (2.58 U/mg) of Avicelase activity, 1.67 U/ ml (5.68 U/mg) of $eta$-glucosidase activity. The optimum pH for enzyme induction was 6.2. The crude enzyme retained 100% of its original CMCase activity at 50$circ$C for 1 hr (pH 5.0), and at 4$circ$C for 24 hrs (pH 5.0). There was no effect on the CMCase activity in the presence of 1 mM of CsCl, LiCl, MgCl$_{2}$, and FeCl$_{2}$, respectively. When the crude enzyme was treated with trypsin and chymotrypsin (2% W/w) for 10 minutes, the remaining CMCase activity was 70%, but there was no further loss of activity for 60 minutes treatment at 30$circ$C. The crude enzyme showed the synergism with rumen fluid for the hydrolysis of Avicel and CMC by 118% and 130%, respectively.

키워드

참고문헌

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