Metabolic engineering of Escherichia coli for the production of 1,3-diaminopropane, a three carbon diamine

Abstract

Bio-based production of chemicals from renewable resources is becoming increasingly important for sustainable chemical industry. In this study, Escherichia coli was metabolically engineered to produce 1,3-diaminopropane (1,3-DAP), a monomer for engineering plastics. Comparing heterologous C4 and C5 pathways for 1,3-DAP production by genome-scale in silico flux analysis revealed that the C4 pathway employing Acinetobacter baumannii dat and ddc genes, encoding 2-ketoglutarate 4-aminotransferase and L-2,4-diaminobutanoate decarboxylase, respectively, was the more efficient pathway. In a strain that has feedback resistant aspartokinases, the ppc and aspC genes were overexpressed to increase flux towards 1,3-DAP synthesis. Also, studies on 128 synthetic small RNAs applied in gene knock-down revealed that knocking out pfkA increases 1,3-DAP production. Overexpression of ppc and aspC genes in the pfkA deleted strain resulted in production titers of 1.39 and 1.35 g l(-1) of 1,3-DAP, respectively. Fed-batch fermentation of the final engineered E. coli strain allowed production of 13 g l(-1) of 1,3-DAP in a glucose minimal medium.

DOI: 10.1038/srep13040

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Cite this paper

@inproceedings{Chae2015MetabolicEO, title={Metabolic engineering of Escherichia coli for the production of 1,3-diaminopropane, a three carbon diamine}, author={Tong Un Chae and Won Kim and Sol Ji Choi and Si Jae Park and Sang Yup Lee}, booktitle={Scientific reports}, year={2015} }