CIESC Journal

• BIOTECHNOLOGY & BIOENGINEERING • 上一篇    下一篇

海澡酸钙胶囊化重组E.coli BL21(DE3)生产靛蓝

陆燕; 梅乐和   

  1. Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027,
    China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-28 发布日期:2007-06-28
  • 通讯作者: 陆燕

Production of indigo by immobilization of E. coli BL21 (DE3) cells in calcium-alginate gel
capsules

LU Yan; MEI Lehe   

  1. Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027,
    China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-06-28 Published:2007-06-28
  • Contact: LU Yan

摘要: The ability of catalyzing indole into indigo of gene engineering strain expressing P450 BM3
immobilized by entrapment in calcium-alginate gel capsules was examined, and various
characteristics of immobilized cells were assessed. Optimum conditions for cells activity
were not affected after immobilization, and pH and temperature for both free and
immobilized cells were found to be pH 7.5 and 35℃, respectively. The immobilized cells
exhibited a markedly improved thermal stability than free cells. After five repeated
experiments, the yield of indigo with the immobilized cells retained over 94% of their
original activity, which indicated that the operational stability for recycling in batch
processes was improved.

关键词: calcium-alginate gel;gene engineering strain;immobilized cells;indigo;P450 BM3

Abstract: The ability of catalyzing indole into indigo of gene engineering strain expressing P450 BM3
immobilized by entrapment in calcium-alginate gel capsules was examined, and various
characteristics of immobilized cells were assessed. Optimum conditions for cells activity
were not affected after immobilization, and pH and temperature for both free and
immobilized cells were found to be pH 7.5 and 35℃, respectively. The immobilized cells
exhibited a markedly improved thermal stability than free cells. After five repeated
experiments, the yield of indigo with the immobilized cells retained over 94% of their
original activity, which indicated that the operational stability for recycling in batch
processes was improved.

Key words: calcium-alginate gel, gene engineering strain, immobilized cells, indigo, P450 BM3