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Research Articles

Development of a biocatalytic cascade for synthesis of 2-oxo-4-(hydroxymethylphosphinyl) butyric acid in one pot

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Pages 190-197 | Received 27 Apr 2020, Accepted 27 Jun 2020, Published online: 25 Jul 2020
 

Abstract

2-Oxo-4-(hydroxymethylphosphinyl) butyric acid (PPO) is an important precursor compound for the broad-spectrum herbicide l-glufosinate (L-PPT). In this study, the gene of d-amino acid oxidase (DAAO) was cloned and expressed in Escherichia 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.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was funded by National Natural Science Foundation of China [No. 21978268 and No. 31970046].

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