Dissolved-oxygen feedback control fermentation for enhancing β-carotene in engineered Yarrowia lipolytica.

ABSTRACT: The DO-stat fed-batch fermentation was carried out to explore the volumetric productivity of β-carotene in engineered Yarrowia lipolytica C11 strain. Using DO-stat fed-batch fermentation, we achieved 94 g/L biomass and 2.01 g/L β-carotene. Both biomass and β-carotene were about 1.28-fold higher than that in fed-batch fermentation. The ATP, NADP⁺/NADPH, and gene expression levels of tHMG, GGS1, carRA, and carB were promoted as compared to that in fed-batch fermentation. As for as the kinetic parameters in DO-stat fed-batch fermentation, μ_m', Y_x/s', and Y_p/s' was 0.527, 0.353, and 0.158, respectively. The μ_m' was elevated 4.66-fold than that in fed-batch fermentation. These data illustrate that more dissolved oxygen increased the biomass

SUBMITTER: Lv PJ 

PROVIDER: S-EPMC7555900 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature