食品科学 ›› 2011, Vol. 32 ›› Issue (7 ): 269-272.doi: 10.7506/spkx1002-6630-201107058

• 生物工程 • 上一篇    下一篇

低能离子注入法选育透明质酸高产菌株

张 伟1,2,姚 俊1,*,陈宽婷1,孙荣斌3,魏钦俊1,曹 新1   

  1. 1.南京医科大学基础医学院生物技术系 2.江苏省常熟职业教育中心校旅游管理系 3.南京医科大学药学院
  • 收稿日期:2010-08-24 修回日期:2011-03-09 出版日期:2011-04-15 发布日期:2011-03-30
  • 通讯作者: 姚俊 E-mail:joelyao@163.com
  • 基金资助:
    江苏省高校自然科学研究计划项目(09KJB530007)

Screening of High-yield Hyaluronic Acid-producing Strain by Low Energy Ion Implantation

ZHANG Wei1,2,YAO Jun1,*,CHEN Kuan-ting1,SUN Rong-bin3,WEI Qin-jun1,CAO Xin1   

  1. 1. Department of Biotechnology, School of Basic Medical Science, Nanjing Medical University, Nanjing 210029, China;
    2. Department of Tourism Management, Changshu Central School of Vocational Education, Changshu 215500, China;
    3. School of Pharmacy, Nanjing Medical University, Nanjing 210029, China
  • Received:2010-08-24 Revised:2011-03-09 Online:2011-04-15 Published:2011-03-30
  • Contact: Jun YAO E-mail:joelyao@163.com

摘要: 以一株兽疫链球菌(Streptococcus zooepidemicus) NN-7为出发菌株,利用30keV,剂量为8×1014N+/cm2氮离子进行诱变,筛选获得溶血素和透明质酸酶双缺陷型突变菌株,经摇瓶发酵培养筛选获得一株透明质酸高产菌株SH-9,透明质酸产量达3.23g/L,相对分子质量达2.12×106,相对于原始菌株,透明质酸产量及相对分子质量分别提高了104.4%及35.9%。6代传代实验表明诱变后得到的高产透明质酸菌株具有较好的传代稳定性。低能离子注入法可作为有效的诱变手段用于透明质酸高产菌株的选育。

关键词: 透明质酸, 兽疫链球菌, 离子注入, 诱变选育

Abstract: Streptococcus zooepidemicus NN-7 was subjected to mutagenesis by means of low energy ion implantation of 8×1014 N+/cm2 dose at 30 keV. After culture in selective medium, the mutant strains with double deficiency of hemolysin and hyaluronic acid-degrading enzyme were screened. Among these strains, a mutant strain capable of producing a high yield of hyaluronic acid was selected and designated as SH-9. The strain still revealed excellent passage stability after six generations. The yield of hyaluronic acid reached up to 3.23 g/L with determined relative molecular weight (Mr) of 2.12×106. Compared with the original parent strain, the yield and molecular weight of hyaluronic acid derived from SH-9 were increased by 104.4%and 35.9%, respectively.

Key words: hyaluronic acid, Streptococcus zooepidemicus, ion implantation, mutation screening

中图分类号: