J4

• 基础研究 • 上一篇    下一篇

重组人β-淀粉样蛋白1-42大规模发酵及纯化工艺

申茉函1,王全才2,刘佳伟3,韦安慧1,朱 洁1,颜炜群1   

  1. 1.吉林大学药学院医学生物工程研究室,吉林 长春 130021;2.中国医科大学盛京医院神经外科,辽宁 沈阳 110003;3.吉林省长春市第六医院ECT醒脉通治疗室,吉林 长春 130052
  • 收稿日期:2008-05-12 修回日期:1900-01-01 出版日期:2009-01-28 发布日期:2009-01-28
  • 通讯作者: 颜炜群

Large scale fermentation and purification technologyof recombinant human β-amyloid peptide 1-42

SHEN Mo-han1,WANG Quan-cai2,LIU Jia-wei1,WEI An-hui1,ZHU Jie1,YAN Wei-qun1   

  1. 1.Department of Bioengineering,School of Pharmacy,Jilin University,Changchun 130021,China; 2. Department of Neurosurgery,Shengjing Hospital,China Medical University,Shenyang 110003,China; 3. Department of ECT,Sixth Hospital of Changchun City,Changchun 130052,China
  • Received:2008-05-12 Revised:1900-01-01 Online:2009-01-28 Published:2009-01-28
  • Contact: YAN Wei-qun

摘要: 目的:在毕赤酵母(Pichia pastoris)中高效表达人β-淀粉样蛋白1-42(hAβ1-42),用80 L的发酵罐大量制备hAβ1-42。方法: 在成功构建表达载体pPICZα-hAβ1-42并电转化至毕赤酵母X-33的基础上,筛选高表达hAβ1-42工程菌,对发酵液的pH值、溶解氧、甲醇流加速度以及诱导表达的时间等发酵条件进行系统优化,通过阳离子交换层析和反向疏水层析对其进行纯化,实现其大规模制备。结果: 筛选出的高表达工程菌采用80 L发酵罐甲醇诱导补料批式发酵,在pH 4.0、溶解氧浓度20 %~30 %、罐内压力为10 psi、甲醇诱导48 h时产量最高可达150 mg•L-1;纯化的hAβ1-42经SDS-PAGE分析显示单一区带,相对分子质量约为4 200。结论:构建、筛选出高效表达hAβ1-42的毕赤酵母工程菌,并建立稳定的发酵和纯化制备工艺。

关键词: 发酵, 分离, 提纯

Abstract: Abstract:Objective To study the efficient expression of the human recombinant β-amyloid protein 1-42(hAβ1-42),and produce hAβ1-42 by optimized fermentation parameters on large scale using Pichia pastoris as host system.Methods On the base of construction of the recombinant expression vector pPICZα-Aβ1-42,and the obtained recombinant vector was transformed into the Pichia pastoris.hAβ1-42 was expressed in 80 L fermentor with optimized parameters and the broth was harvested and purified with SP Sepharose and Source TM 30 RPC.Results hAβ1-42 in the broth could reach maximal yield of 150 mg•L-1 after induced by methanol for 48 h.The expressed product was purified from the fermentating culture.Analytic results revealed that the relative molecular mass of obtained product was about 4 200.Conclusion hAβ1-42 can be expressed in Pichia pastoris on large scale.A stable fermentation and purification technology is successfully set up.

Key words: fermentation, separation, purification

中图分类号: 

  • Q78