欢迎访问过程工程学报, 今天是

›› 2005, Vol. 5 ›› Issue (4): 430-433.

• 生化工程专栏 • 上一篇    下一篇

西索米星分批发酵的动力学特性

陈剑锋,张元兴,郭养浩,孟 春,石贤爱,陈 凡   

  1. 福州大学生物科学与工程学院
  • 出版日期:2005-08-20 发布日期:2005-08-20

Kinetic Characteristics of Antibiotic Sisomicin in a Batch Fermentation Process

CHEN Jian-feng,ZHANG Yuan-xing,GUO Yang-hao,MENG Chun,SHI Xian-ai,CHEN Fan   

  1. College of Biological Science and Technology, Fuzhou University
  • Online:2005-08-20 Published:2005-08-20

PDF

摘要： 伊尼奥小单孢菌F003的发酵特性研究表明，西索米星发酵过程具有典型的非生长耦联特征. 当以淀粉为主要碳源时，对数生长期最大菌体比生长速率为0.058 h-1，产物合成期最大产物比合成速率0.0018 g/(g×h). HPLC和酶法测定结果显示发酵液中主要的可发酵糖为麦芽糖，适合菌体生长的麦芽糖浓度或葡萄糖浓度分别为10.0~25.0和7.5~15.0 g/L，可发酵糖浓度低于10.2 g/L将限制西索米星合成. 西索米星发酵过程淀粉水解酶表观活性的动力学特性表明，在对数生长期淀粉水解酶表观活性较高，最大值为0.84 g/(L×h)，在发酵中后期淀粉水解酶表观活性仅为最大值的1/4~1/20，导致可发酵糖浓度降低，限制西索米星的合成. 西索米星浓度大于0.50 g/L将明显抑制产物合成.

关键词: 西索米星, 动力学特性, 淀粉水解酶, 产物合成

Abstract: The sisomicin production was found to be non-associated with the cell growth of M. inyoensis F003. When starch was used as main carbon source, the maximal specific growth rate was 0.058 h-1, and the maximal specific sisomicin production rate was 0.0018 g/(g×h). The cells of M. inyoensis F003 grew well at 10.0~25.0 g/L maltose or 7.5~15.0 g/L glucose in fermentation broth. It was shown by HPLC analysis and enzymatic measurement that maltose was the main fermentable sugar during the fermentation, and sisomicin biosynthesis was limited when the level of fermentable sugar was below 10.2 g/L. The apparent activity of starch-hydrolytic enzymes in the batch fermentation of M. inyoensis F003 was 1/4 to 1/20 fold of the maximum value 0.84 g/(L×h) in sisomicin biosynthesis phase, its apparent activity, which would result in restriction to the sisomicin biosynthesis by the limitation of fermentable sugar in the broth. Sisomicin above 0.5 g/L was inhibitive to its biosynthesis.

Key words: sisomicin, kinetics, starch-hydrolytic enzymes, biosynthesis