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Efficient Secretory Production of δ-Tocotrienol by Combining Pathway Modularization and Transportation Engineering
- Source :
- Journal of Agricultural and Food Chemistry; June 2023, Vol. 71 Issue: 23 p9020-9030, 11p
- Publication Year :
- 2023
-
Abstract
- The vitamin E component δ-tocotrienol has shown impressive activities in radioprotection, neuroprotection, and cholesterol reduction. Its production is limited by the low content in plants and difficulty in separation from other tocotrienols. Fermentative production using a microbial cell factory that exclusively produces and secretes δ-tocotrienol is a promising alternative approach. Assembly of the δ-tocotrienol synthetic pathway in Saccharomyces cerevisiaefollowed by comprehensive pathway engineering led to the production of 73.45 mg/L δ-tocotrienol. Subsequent addition of 2-hydroxypropyl-β-cyclodextrin (CD) and overexpression of the transcription factor PDR1 significantly elevated δ-tocotrienol titer to 241.7 mg/L (63.65 mg/g dry cell weight) in shake flasks, with 30.4% secreted. By properly adding CD and the in situ extractant olive oil, 181.12 mg/L of δ-tocotrienol was collected as an extracellular product, accounting for 85.6% of the total δ-tocotrienol production. This process provides not only a promising δ-tocotrienol cell factory but also insights into yeast engineering toward secretory production of other terpenoids.
Details
- Language :
- English
- ISSN :
- 00218561 and 15205118
- Volume :
- 71
- Issue :
- 23
- Database :
- Supplemental Index
- Journal :
- Journal of Agricultural and Food Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs63204504
- Full Text :
- https://doi.org/10.1021/acs.jafc.3c01743