大肠杆菌
基因
效价
生物
转移RNA
模块化设计
抗体
遗传学
大肠杆菌蛋白质类
计算生物学
计算机科学
程序设计语言
作者
Jinhua Zhang,Yan-Shu Zhao,Yingxiu Cao,Zhenpeng Yu,Guoping Wang,Yi-Qun Li,Ye Xiaoqiong,Congfa Li,Xue Lin,Hao Song
标识
DOI:10.1021/acssynbio.0c00062
摘要
The production of the aglycosylated immunoglobulin G (IgG) in Escherichia coli has received wide interest for its analytical and therapeutic applications. To enhance the production titer of IgG, we first used synthetic sRNAs to perform a systematical analysis of the gene expression in the translational level in the glycolytic pathway (module 1) and the tricarboxylic acid (TCA) cycle (module 2) to reveal the critical genes for the efficient IgG production. Second, to provide sufficient amino acid precursors for the protein biosynthesis, amino acid biosynthesis pathways (module 3) were enhanced to facilitate the IgG production. Upon integrated engineering of these genes in the three modules (module 1, aceF; module 2, gltA and acnA; module 3, serB) and optimization of fermentation conditions, the recombinant E. coli enabled a titer of the full-assembled IgG of 4.5 ± 0.6 mg/L in flask cultures and 184 ± 9.2 mg/L in the 5 L high cell density fed-batch fermenter, which is, as far as we know, the highest reported titer of IgG production in recombinant E. coli.
科研通智能强力驱动
Strongly Powered by AbleSci AI