Biochemical Characterization of Parsley Glycosyltransferases Involved in the Biosynthesis of a Flavonoid Glycoside, Apiin
The flavonoid glycoside apiin (apigenin 7-<i>O</i>-[β-D-apiosyl-(1→2)-β-D-glucoside]) is abundant in apiaceous and asteraceous plants, including celery and parsley. Although several enzymes involved in apiin biosynthesis have been identified in celery, many of the enzymes in parsley (<...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-12-01
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| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/24/23/17118 |
| Summary: | The flavonoid glycoside apiin (apigenin 7-<i>O</i>-[β-D-apiosyl-(1→2)-β-D-glucoside]) is abundant in apiaceous and asteraceous plants, including celery and parsley. Although several enzymes involved in apiin biosynthesis have been identified in celery, many of the enzymes in parsley (<i>Petroselinum crispum</i>) have not been identified. In this study, we identified parsley genes encoding the glucosyltransferase, PcGlcT, and the apiosyltransferase, PcApiT, that catalyze the glycosylation steps of apiin biosynthesis. Their substrate specificities showed that they were involved in the biosynthesis of some flavonoid 7-<i>O</i>-apiosylglucosides, including apiin. The expression profiles of <i>PcGlcT</i> and <i>PcApiT</i> were closely correlated with the accumulation of flavonoid 7-<i>O</i>-apiosylglucosides in parsley organs and developmental stages. These findings support the idea that <i>PcGlcT</i> and <i>PcApiT</i> are involved in the biosynthesis of flavonoid 7-<i>O</i>-apiosylglucosides in parsley. The identification of these genes will elucidate the physiological significance of apiin and the development of apiin production methods. |
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| ISSN: | 1661-6596 1422-0067 |