Optimal Culture Conditions for Production of Subtilisin-like Protease Inhibitor from Streptomyces thermocarboxydus C12

Streptomyces thermocarboxydus C12에서 Subtilisin-like Protease Inhibitor 생산을 위한 최적배양조건

  • Kang, Sung-Il (Dept. of Biotechnology & Bioengineering, Pukyong National University) ;
  • Jang, Young-Boo (Dept. of Biotechnology & Bioengineering, Pukyong National University) ;
  • Choi, Gyeong-Lim (Division of Marine Bioscience/Institue of Marine Industry, Gyeongsang National University) ;
  • Choi, Byeong-Dae (Division of Marine Bioscience/Institue of Marine Industry, Gyeongsang National University) ;
  • Kong, Jai-Yul (Dept. of Biotechnology & Bioengineering, Pukyong National University) ;
  • Choi, Yeung-Joon (Division of Marine Bioscience/Institue of Marine Industry, Gyeongsang National University)
  • 강성일 (부경대학교 생물공학과) ;
  • 장영부 (부경대학교 생물공학과) ;
  • 최경임 (경상대학교 해양식품생명공학과) ;
  • 최병대 (경상대학교 해양식품생명공학과) ;
  • 공재열 (부경대학교 생물공학과) ;
  • 최영준 (경상대학교 해양식품생명공학과)
  • Published : 2008.03.31


The objective of this paper was to investigate optimal culture conditions for the production of an inhibitor against subtilisin-like protease from Streptomyces thermocarboxydus (S. thermocarboxydus) C12 isolated from sediments of Gwangyang coast. The optimal temperature and initial pH for the production of subtilisin-like protease inhibitor were $40^{\circ}C$ and pH 8.0, respectively. Inhibition activities were high for galactose, glucose and fructose. The best carbon source and its concentration were galactose and 1.6% (w/v), respectively. Inhibition activities were also high in medium containing polypeptone, proteose and peptone. Optimal nitrogen source and concentration were protease peptone and 0.5% (w/v), respectively. Optimal concentrations for inhibitor production were 1% (w/v) for NaCl and 1 mM LiCl for metal salts. The subtilisin-like protease inhibitor from S. thermocarboxydus C12 showed a maximum inhibitor activity after cultivation for 84 h under the optimized medium.


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