食品科学 ›› 2005, Vol. 26 ›› Issue (7): 58-63.

• 基础研究 • 上一篇    下一篇

凝乳酶的基因克隆、序列分析及初步表达

 邱重晏, 徐敏, 王正祥   

  1. 江南大学生物工程学院工业生物技术教育部重点实验室
  • 出版日期:2005-07-15 发布日期:2011-09-19

Molecular Cloning, Sequence Analysis and Primary Expression of Mucor pusillus DNA

 QIU  Zhong-Yan, XU  Min, WANG  Zheng-Xiang   

  1. The Key Laboratory of Industrial Biology, School of Biotechnology, Southern Yangtze University
  • Online:2005-07-15 Published:2011-09-19

摘要: PCR扩增得到微小毛霉凝乳酶结构基因并测定其核苷酸序列,用DNAman软件分析其核苷酸序列及推衍得到的多肽序列,结果表明扩增得到的片段为凝乳酶基因。构建了重组菌Pichia pastoris KM71/PIC9K-mcp,通过G418抗性筛选得到具有多拷贝基因的整合重组菌MK3。用甲醇诱导进行初步发酵试验,测得重组菌MK3酶活为5.4U/ml。

关键词: 凝乳酶, 克隆, 序列分析, 重组菌, 表达

Abstract: In this paper, rennin gene was amplified from Mucor pusillus and sequenced. The nucleic acid sequence and amino-acid sequence encoded by the gene were compared using DNAman biological software. Results showed that amplified fragmentwas a novel rennin gene(mcp). re-combination Pichia pastoris KM71/PIC9K-mcp was constructed successfully and obtained amulti-copied integrated strain of MK3 by resistant screening (G418). Initial fermation experiments were carried out andmethanol was used as sole carbon source. The enzyme activity of re-combination MK3 was 5.4U/ml in above condition.

Key words: rennin, clone, sequence analysis, re-combination strain, express