Metabolic engineering of Saccharomyces cerevisiae for production of β-carotene from hydrophobic substrates.

FEMS Yeast Research
Zahra FathiFarshad Darvishi

Abstract

β-Carotene is a yellow-orange-red pigment used in food, cosmetics and pharmacy. There is no commercial yeast-based process for β-carotene manufacturing. In this work, we engineered the baker's yeast Saccharomyces cerevisiae by expression of lipases and carotenogenic genes to enable the production of β-carotene on hydrophobic substrates. First, the extracellular lipase (LIP2) and two cell-bound lipases (LIP7 and LIP8) from oleaginous yeast Yarrowia lipolytica were expressed either individually or in combination in S. cerevisiae. The engineered strains could grow on olive oil and triolein as the sole carbon source. The strain expressing all three lipases had ∼40% lipid content per dry weight. Next, we integrated the genes encoding β-carotene biosynthetic pathway, crtI, crtYB and crtE from Xanthophyllomyces dendrorhous. The resulting engineered strain bearing the lipases and carotenogenic genes reached a titer of 477.9 mg/L β-carotene in yeast peptone dextrose (YPD) medium supplemented with 1% (v/v) olive oil, which was 12-fold higher than an analogous strain without lipases. The highest β-carotene content of 46.5 mg/g DCW was obtained in yeast nitrogen base (YNB) medium supplemented with 1% (v/v) olive oil. The study demonstrates...Continue Reading

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Citations

Feb 11, 2021·Metabolites·Alexander RapoportAnna Maria Kot
Feb 18, 2022·World Journal of Microbiology & Biotechnology·Xue JiaoLidan Ye

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Methods Mentioned

BETA
PCR

Software Mentioned

DinoCapture

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