Journal
BIOCATALYSIS AND BIOTRANSFORMATION
Volume 39, Issue 3, Pages 190-197Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10242422.2020.1797697
Keywords
2-oxo-4-(hydroxymethylphosphinyl)butyric acid; d-amino acid oxidase; catalase; biocatalysis
Funding
- National Natural Science Foundation of China [21978268, 31970046]
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In this study, the gene of d-amino acid oxidase (DAAO) was cloned and expressed in Escherichia coli to construct a biocatalytic cascade for the synthesis of PPO. By optimizing the reaction conditions, a high conversion rate of DL-PPT was achieved, providing a promising route for the large-scale production of PPO and the asymmetric synthesis of L-PPT using bio-enzymatic methods.
2-Oxo-4-(hydroxymethylphosphinyl) butyric acid (PPO) is an important precursor compound for the broad-spectrum herbicidel-glufosinate (L-PPT). In this study, the gene ofd-amino acid oxidase (DAAO) was cloned and expressed inEscherichia coli. By coupling exogenous catalase (CAT), a biocatalytic cascade was constructed for synthesis of PPO in one pot. The bioprocess was optimized on a 300 mL scale reaction by one factor at a time optimization. The conversion of this biocatalytic cascade achieved 46.8% towards 400 mM DL-PPT within 4 h. These results indicated that DAAO could be applied to the large-scale bioproduction of PPO and provide a promising route for the asymmetric synthesis of L-PPT by bio-enzymatic methods using PPO as the substrate.
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