T7 Expression Systems for Inducible Production of Proteins from Cloned Genes in E. coli
- Brookhaven National Lab. (BNL), Upton, NY (United States)
Inducible T7 expression systems are capable of producing a wide range of proteins in E. coli. Improvements over common practice include: preventing unintended induction by establishing and maintaining expression strains in non-inducing growth media comprised entirely of purified components instead of complex growth media that may variably induce target proteins on approach to saturation; and expressing many target proteins in parallel by convenient and productive auto-induction in BL21(DE3) and other suitable hosts, instead of IPTG induction. From earliest days, basal expression prevented establishment of inducible strains for producing proteins that are stressful to the host. Newly developed pAL vectors now reduce basal expression to levels where coding sequences for even the most stressful proteins can be maintained and induced. In conclusion, asymmetric ligation allows simple and efficient cloning of individual coding sequences or simultaneous cloning of two or three coding sequences for co expression from a single pAL vector.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1462437
- Report Number(s):
- BNL-207916-2018-JAAM
- Journal Information:
- Current Protocols in Molecular Biology, Vol. 124, Issue 1; ISSN 1934-3639
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Construction of a strain-producer of the chimeric protein consisting of RNA polymerase and a DNA-affinity domain
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journal | October 2018 |
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