KSBB Journal

  • 제18권2호
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  • Pages.155-160
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  • 2003
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  • 1225-7117(pISSN)
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  • 2288-8268(eISSN)
한국생물공학회 (The Korean Society for Biotechnology and Bioengineering)
권호 표지

용존산소 농도 조절이 미생물유래 Transglutaminase 생산에 미치는 영향

The Effect of Dissolved Oxygen on Microbial Transglutaminase production by Streptoverticillium morbaraense

  • 유재수 (전북대학교 농과대학 응용생물공학부) ;
  • 전계택 (강원대학교 자연과학대학 생명과학부) ;
  • 정용섭 (전북대학교 농과대학 응용생물공학부)
  • 발행 : 2003.04.01
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초록

Streptoverticillium morbaraene로부터 미생물 유래 transglutaminase 생산을 위하여 최적의 용존산소 농도를 구명하였다. 용존산소는 용존산소 농도 자동 조절 시스템에 의해 조절되었다. 발효 중 용존산소 농도 조절을 위하여 통기속도는 0.3-3.9 L/min, 교반속도는 260-360 rpm으로 각각 범위를 설정하였다. 용존산소 농도를 조절한 다양한 회분식 배양에서 용존산소가 20%일 때 최대 미생물유래 transgiutaminase 생산이 가능하였다. 최분배양에서 용존산소 농도를 20%로 조절한 경우 미생물유래 transglutaminase 생산은 2.12 U/mL이었고, 용존산소를 조절하지 않은 회분식 배양의 미생물유래 transglutaminase 생산보다 1.1배 향상되었다. 역시 가장 높은 미생물유래 transglutaminase 생산은 용존산소를 20%로 조절한 유가식 배양에서 가능하였으며, 용존산소를 조절하지 않은 회분식 배양의 미생물유래 transglutaminase 생산에 비교해서 1.3배 증가하였다. 최대 건조균체량과 미생물유래 transglutaminase 생산은 각각 13.2 g/L와 2.6 U/mL이었다. 용존산소를 20%로 용존산소 농도 자동 조절 시스템에 의해 조절한 유가식 배양은 미생물유래 transgiutaminase 생산에 적절하였으며 다른 미생물 배양에도 적용할 수 있을 것으로 판단된다.

The effect of dissolved oxygen(DO) on microbial transglutaminase(mTG) production by Streptoverticillium morbaraense was studied in on-line computer controlled fermentation system. In order to control dissolved oxygen during fermentation, the agitation speed and aeration rate of 2.5 L fermenter ranged from 260 to 360 rpm and 0.3 to 3.9 L/min, respectively. The maximum microbial transglutaminase production was obtained at controlled 20% of dissolved oxygen among the various dissolved oxygen controlled batch cultures tested. The production of microbial transglutaminase at controlled 20% of dissolved oxygen was about 2.12 U/mL which was 1.1 times higher than that obtained in batch culture without control of dissolved oxygen. Also, the highest microbial transglutaminase production was obtained in fed-batch cultures in which dissolved oxygen was controlled at 20%, and it was improved almost 1.3 times in comparison with that without control of dissolved oxygen. Maximal dry cell weight and microbial transglutaminase production were 13.2 g/L and 2.6 U/mL, respectively. Finally, it was also found that fed-batch fermentation at controlled 20% of dissolved oxygen showed a good performance for the microbial transglutaminase production by on-line computer controlled fermentation system which may be generally applicable to other microbial cultures.

키워드

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