生物技术通报 ›› 2016, Vol. 32 ›› Issue (6): 226-230.doi: 10.13560/j.cnki.biotech.bull.1985.2016.06.033

• 研究报告 • 上一篇    下一篇

重组胰岛素原在毕赤酵母中高效分泌表达的研究

梁果义1, 甘一迪1, 刘晓航1, 蔡祥胜2   

  1. 1. 北京双鹭药业股份有限公司,北京 100043
    2. 南方医科大学生物治疗研究所,广州 510515
  • 收稿日期:2015-09-30 出版日期:2016-06-27 发布日期:2016-06-28
  • 作者简介:梁果义,男,研究生,研究方向:生物医药;E-mail:guoyi_liang@163.com

Study on the Highly Secreted Expression of the Recombinant Insulin in Pichia pastoris

LIANG Guo-yi1, GAN Yi-di1, LIU Xiao-hang1, CAI Xiang-sheng2   

  1. 1. Beijing SL Pharmaceutical Co.,Ltd.,Beijing 100043
    2. Institute of Biotherapy of Southern Medical University,Guangzhou 510515
  • Received:2015-09-30 Published:2016-06-27 Online:2016-06-28

摘要: 为了提高胰岛素在酵母的分泌表达效率,首先合成了胰岛素原基因,并在其序列的N端引入了一段引导肽,构建成pPICZα-A-Pro-INS重组分泌型表达载体。将表达载体线性化处理后电击转化毕赤酵母GSll5感受态细胞,筛选获得分泌型高表达工程菌株,重组蛋白的表达水平为300 mg/L,占分泌总蛋白的40%左右。该结果表达明引导肽的存在对于在毕赤酵母中高效表达胰岛素的基因至关重要。

关键词: 胰岛素, 毕赤酵母, 高效表达, 引导肽

Abstract: In order to improve the efficiency of insulin secretion expression in yeast,firstly the pro-insulin gene was synthesized,and a recombinant secreted expression vector(pPICZα-A-Pro-INS)was constructed by inserting a leader peptide to N-end of the gene’s sequence. Linearized expression vector was transformed into the competent cells of Pichia pastoris GSll5. A strain with highly secreted expression of the insulin was screened,by which the secreted recombinant protein expression level was 300 mg/L,accounting for about 40% of the total secreted protein. This result revealed that the leader peptide is crucial to the gene of highly expressing insulin in P. pastoris.

Key words: insulin, Pichia pastoris, highly expression, leader peptide