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- W3150621083 abstract "Linoleic acid (LA) has garnered much attention due to its potential applications in the oleochemical and nutraceutical industries. The oleaginous yeast Rhodotorula toruloides has outstanding lipogenecity, and is considered a potential alternative to the current plant-based platforms for LA production. Δ12-fatty acid desaturases (Δ12-Fads) are involved in LA synthesis in various fungi and yeasts, but their functions in R. toruloides remain poorly understood. To achieve the production of LA-rich lipids in R. toruloides, we investigated the function of the native Δ12-FAD (RtFAD2). First, the overexpression of RtFAD2 and its co-overexpression with RtFAD1 (encoding R. toruloides Δ9-Fad) and their effects on LA production in R. toruloides were investigated. The function of RtFad2 was confirmed by heterologous expression in Saccharomyces cerevisiae. Overexpression of RtFAD2 significantly elevated the LA contents and titers in the wild-type strain R. toruloides DMKU3-TK16 (TK16) and in a thermotolerant derivative of TK16 (L1-1). Additionally, overexpression of RtFAD2 in R. toruloides strains also increased the lipid titer and content. Overexpression of RtFAD1 was down-regulated in the RtFAD1 and RtFAD2 co-overexpressing strains, suggesting that the elevated LA content may function as a key regulator of RtFAD1 expression to control C18 fatty-acid synthesis in R. toruloides. We characterized the function of RtFAD2 and showed that its overexpression in R. toruloides increased the lipid and LA production. These findings may assist in the rational design of metabolic engineering related to LA or polyunsaturated fatty acid production in R. toruloides." @default.
- W3150621083 created "2021-04-13" @default.
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- W3150621083 date "2021-06-01" @default.
- W3150621083 modified "2023-09-23" @default.
- W3150621083 title "Functional characterization and overexpression of Δ12-desaturase in the oleaginous yeast Rhodotorula toruloides for production of linoleic acid-rich lipids" @default.
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- W3150621083 doi "https://doi.org/10.1016/j.jbiosc.2021.02.002" @default.
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