SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (2): 185-191.DOI: 10.1016/S1004-9541(13)60457-7

• BIOTECHNOLOGY AND BIOENGINEERING • Previous Articles     Next Articles

Optimization of DsbA Purification from Recombinant Escherichia coli Broth Using Box-Behnken Design Methodology

LUO Man, GUAN Yixin, YAO Shanjing   

  1. Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2011-05-13 Revised:2011-10-16 Online:2013-03-13 Published:2013-02-28

Optimization of DsbA Purification from Recombinant Escherichia coli Broth Using Box-Behnken Design Methodology

罗曼, 关怡新, 姚善泾   

  1. Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • 通讯作者: GUAN Yixin
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21036005).

Abstract: Disulfide bond formation protein A (DsbA) is one of the important helper proteins for folding in protein synthesis in vivo. In this study, purification of recombinant DsbA was investigated by examining four important factors with Box-Behnken design method, a statistic-based design of experiments. The optimal operation conditions were obtained by adopting the effectiveness coefficient method on the multi-objective problem, which takes the protein recovery, purification efficiency and throughput of ion-exchange chromatography into account. After the optimization, protein recovery of 96.8% and purity higher than 95% DsbA was achieved, and the productivity was (377.9?1.7) mg soluble DsbA per liter broth. The purified protein was identified by peptide mass fingerprinting matching the record of gi|2624856, a mutant of DsbA. The DsbA was preliminarily applied to the refolding of denatured lysozyme in vitro.

Key words: disulfide bond formation protein A, protein purification, Box-Behnken experiment design, response surface methodology, multi-object programming

摘要: Disulfide bond formation protein A (DsbA) is one of the important helper proteins for folding in protein synthesis in vivo. In this study, purification of recombinant DsbA was investigated by examining four important factors with Box-Behnken design method, a statistic-based design of experiments. The optimal operation conditions were obtained by adopting the effectiveness coefficient method on the multi-objective problem, which takes the protein recovery, purification efficiency and throughput of ion-exchange chromatography into account. After the optimization, protein recovery of 96.8% and purity higher than 95% DsbA was achieved, and the productivity was (377.9?1.7) mg soluble DsbA per liter broth. The purified protein was identified by peptide mass fingerprinting matching the record of gi|2624856, a mutant of DsbA. The DsbA was preliminarily applied to the refolding of denatured lysozyme in vitro.

关键词: disulfide bond formation protein A, protein purification, Box-Behnken experiment design, response surface methodology, multi-object programming