한천분해효소의 고생산성 변이주의 분리 및 최적배양조건

Isolation and Its Optimal Culture Condition for High Agarase-Producing Mutant

  • 황선희 (부경대학교 식품생명공학부) ;
  • 하순득 (부경대학교 식품생명공학부) ;
  • 김봉조 (부경대학교 식품생명공학부) ;
  • 김학주 (부경대학교 식품생명공학부) ;
  • 공재열 (부경대학교 식품생명공학부)
  • 발행 : 1999.06.01

초록

A marine bacterium Bacillus cereus ASK202, agarase producing strain, was treated with some mutagenic agents, ultraviolte(UV), 1-methyl-3-nitro-1-nitrosoguanidine(NTG), and ethyl methane sulfonate(EMS), several times for the increasing of the agarase production After mutagen treatment, we isolated one mutant strain treated with NTG showed the highest stability and agarase productivity and named as Bacillus cereus ASK202-N3. This Bacillus cereus ASK202-N3 strain was well grown in the modified marine medium containing 0.5%(w/v) agar, 0.3%(w/v) yeast extract, and 5.0%(w/v) NaCl, and the optimal initial pH, temperature and culture time were 7.8, $25^{\circ}C$ and 32h, respectively. In the optimal culture conditions, the agarase production was increased to 5.3 fold(850units/L) compared to that of the wild type.

키워드

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