生物技术通报 ›› 2013, Vol. 0 ›› Issue (6): 116-121.

• 研究报告 • 上一篇    下一篇

诺卡氏菌酰胺酶在大肠杆菌中的重组表达及其在锦纶改性中的应用

郭迎春1, 2, 陈晟1, 宿玲恰1, 吴敬1   

  1. (1.江南大学 食品科学与技术国家重点实验室 工业生物技术教育部重点实验室, 无锡 214122;2.江南大学生物工程学院, 无锡 214122)
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2013-06-20 发布日期:2013-06-20
  • 作者简介:郭迎春, 女, 硕士研究生, 研究方向: 酶工程;E-mail: guoyingchun10@163.com
  • 基金资助:
    江苏省科学与技术支持项目(BE2012018)

Recombinant and Expression of Amidase from Nocardia farcinica in E. coli and Application on PA Modification

Guo Yingchun1, 2 Chen Sheng1 Su Lingqia1 Wu Jing1   

  1. (1. State Key Laboratory of Food Science and Technology, Industrial Biotechnology Key Laboratory of the Ministry of Education, Jiangnan University, Wuxi 214122;2. Institute of Biological Engineering, Jiangnan University, Wuxi 214122)
  • Received:2013-06-20 Revised:2013-06-20 Published:2013-06-20 Online:2013-06-20

摘要: 将来源于诺卡氏菌(Nocardia farcinica) 的酰胺酶在E. coli中进行了重组表达。构建了重组表达质粒pET24a/AMID, 转入宿主菌E. coli Origami(DE3) 中, 0.4 mmol/L IPTG, 25℃诱导20 h后, 酶活为1.02 U/mL。在此基础上, 考察了重组酰胺酶在PA改性中的应用。通过优化温度、pH、处理时间和摇床转速等因素对酶处理的影响, 确定了酶处理的最优条件为: 40℃, pH7.5, 处理时间1 h, 摇床转速100 r/min, 在该处理条件下, 与磷酸缓冲液对比, PA吸水高度提高了8.7 cm, 上染率提高了23.1%, 基本能够达到碱处理的效果。

关键词: 酰胺酶, 诺卡氏菌, 重组表达, 大肠杆菌, PA改性

Abstract: The amidase from Nocardia farcinica was recombined and expressed in E. coli. The recombinant vector pET24a/AMID was constructed and transferred into E. coli Origami(DE3). After 20 h induction(0.4 mmol/L IPTG, 25℃), the amidase activity was reached about 1.02 U/mL. In this study, the effect of temperature, pH, treatment time and rotation rate was investigated when PA fabric was treated with recombinant amidase, the water absorbability and wettability was detected by the methods of capillary effect and dying test. The result was demonstrated that the optimization of treatment condition were as follow: 40℃, pH7.5, 100 r/min rotation rate and treated 1 h, under this condition, the rising height of PA was increased by 8.7 cm, the dying percent was increased by 23.1%. The effect of enzymatic modification by recombinant amidase was almost the same as alkali treatment.

Key words: Amidase, Nocaridia farcinica, Recombinant and expression, E. coli, PA modification