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Biosynthesis of l-phosphinothricin with enzymes from chromosomal integrated expression in E. coli

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Abstract

Phosphinothricin (PPT) is one of the most prevalently using herbicides. The commercial phosphinothricin products are generally in the form of a racemic mixture, of which only the l-phosphinothricin (L-PPT) gives herbicidal function. Synthesis of optically pure L-PPT by deracemization of D/L-PPT is a promising way to cut down the environmental burden and manufacturing cost. To convert D/L-PPT to L-PPT, we expressed the catalytic enzymes by genomic integration in E. coli. The whole production was implemented in two steps in one pot using four catalytic enzymes, namely d-amino acid oxidase, catalase, glutamate dehydrogenase, and glucose dehydrogenase. Finally, after a series of process optimization, the results showed that with our system the overall L-PPT yield reached 86%. Our study demonstrated a new strategy for L-PPT synthesis, based on enzymes from chromosomal integrated expression, which does not depend on antibiotic selection, and shows a high potential for future industrial application.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21978268).

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Y-KC created the idea and wrote the first draft. HG implemented the laboratory work. Y-PX and Y-GZ provided financial support and finalized the draft.

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Correspondence to Ya-Ping Xue.

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The authors declare that they have no conflict of interest in this publication.

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Cen, YK., Gong, H., Xue, YP. et al. Biosynthesis of l-phosphinothricin with enzymes from chromosomal integrated expression in E. coli. 3 Biotech 11, 477 (2021). https://doi.org/10.1007/s13205-021-03037-7

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  • DOI: https://doi.org/10.1007/s13205-021-03037-7

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