Abstract
Objective
To construct effective genetic expression parts controlling transcription and translation initiation for synthetic biology and heterologous expression in Corynebacterium glutamicum.
Result
Twelve highly expressed genes were identified from the proteomic data of C. glutamicum. Their related sequences were used to construct bicistronic genetic expression parts. Each part contain promoter, 5′-UTR, N-terminal sequence of the source gene and a conserved SD sequence, associated with target gene, forming the bicistronic expression cassette. The enhanced green fluorescent protein (EGFP) expression levels controlled by these novel parts have 1.4 to 790-fold increase in C. glutamicum compared with corresponding promoter-5′-UTR part. One of the bicistronic parts is 1.35 times the EGFP expression of the constitutive-expression pXMJ19. These bicistronic parts had expression advantage compared with conventional promoter-5′-UTR parts.
Conclusion
Various genetic parts for efficient gene expression can be quickly obtained via this new method.
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Acknowledgment
This work was financially supported by the National Basic Research Program of China (973 Program) (Grant No. 2013CB733602), the Fundamental Research Funds for the Central Universities (Grant No. JUSRP51401A) and the Natural Science Foundation of Jiangsu Province (Grant No. BK20150148).
Supporting information
Supplementary Table 1—Primers used.
Supplementary Table 2—Information about highly expressed genes in C. glutamicum.
Supplementary Fig. 1—Construction process of the probe vector pE-0.
Supplementary Fig. 2—Insertion of fragments guided by Golden Gate method to seamlessly connect genetic expression parts to reporter gene.
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Zhao, Z., Liu, X., Zhang, W. et al. Construction of genetic parts from the Corynebacterium glutamicum genome with high expression activities. Biotechnol Lett 38, 2119–2126 (2016). https://doi.org/10.1007/s10529-016-2196-y
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DOI: https://doi.org/10.1007/s10529-016-2196-y