Synthetic-biological approach for production of neoxanthin in Escherichia coli

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Abstract

Carotenoids are isoprenoid pigments produced typically in plants, algae, and part of bacteria and fungi. Violaxanthin, neoxanthin, and lutein are xanthophylls biosynthesized specifically in land plants and part of algae. Nowadays, it is feasible to produce violaxanthin and lutein in Escherichia coli by pathway engineering, whereas there is no report to synthesize neoxanthin in E. coli. So far, several genes have been reported to code for neoxanthin synthases, e.g., NSY (NXS), ABA4 and VDL, which were assigned to catalyze a reaction for forming neoxanthin from violaxanthin. However, neither gene of these was common in plants or algae that biosynthesize neoxanthin, nor was confirmed by the E. coli complementation system. This study showed that the algal VDL gene (PtVDL1) was functional in recombinant E. coli cells accumulating violaxanthin to produce neoxanthin, whereas the E. coli cells failed to generate neoxanthin, when the NSY or ABA4 gene was introduced there instead of VDL. This result notes that VDL is one of veritable neoxanthin synthase genes.

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Higuchi, Y., Iha, M., Maoka, T., Misawa, N., & Takemura, M. (2023). Synthetic-biological approach for production of neoxanthin in Escherichia coli. Plant Biotechnology, 40(1), 15–20. https://doi.org/10.5511/plantbiotechnology.22.1130a

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