Comprehensive engineering of Escherichia coli for enhanced expression of IgG antibodies.

Comprehensive engineering of Escherichia coli for enhanced expression of IgG antibodies.
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DOI:
10.1016/j.ymben.2010.11.002
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发表时间:
2011-03
影响因子:
8.4
通讯作者:
Georgiou, George
Georgiou, George
中科院分区:
工程技术1区
文献类型:
--
作者:
Makino, Tomohiro;Skretas, Georgios;Kang, Tae-Hyun;Georgiou, George

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The expression of IgG antibodies in Escherichia coli is of increasing interest for analytical and therapeutic applications. In this work, we describe a comprehensive and systematic approach to the development of a dicistronic expression system for enhanced IgG expression in E. coli encompassing: (i) random mutagenesis and high-throughput screening for the isolation of overexpressing strains using flow cytometry, and (ii) optimization of translation initiation via the screening of libraries of synonymous codons in the 5’ region of the second cistron (heavy chain). The effects of different promoters and co-expression of molecular chaperones on full-length IgG production were also investigated. The optimized system resulted in reliable expression of fully assembled IgG at yields between 1 and 4 mg/liter of shake flask culture for different antibodies.
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