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  • Title: Reduction of lipid-accumulation of oleaginous yeast Rhodosporidium toruloides through CRISPR/Cas9-mediated inactivation of lipid droplet structural proteins.
    Author: Jiao X, Lyu L, Zhang Y, Huang Q, Zhou R, Wang S, Wang S, Zhang S, Zhao ZK.
    Journal: FEMS Microbiol Lett; 2021 Sep 01; 368(16):. PubMed ID: 34410383.
    Abstract:
    The basidiomycetous yeast Rhodosporidium toruloides is an important chassis organism for producing microbial lipids and terpenoids. However, excess carbon flux flows towards lipid synthesis than terpenoid synthesis. Thus, it is essential to limit lipid accumulation so that R. toruloides can be explored as an advanced cell factory for producing non-lipid derivatives. In this study, we knocked out two lipid droplet (LD) structural proteins (Ldp1 and Cals) of R. toruloides NP11 through the CRISPR/Cas9 system to reduce lipid production. The results showed that lipid content of LD protein-disrupted strains dropped by over 40%. LDP1-disrupted mutants harbored small-sized LDs. This study provided valuable information to study about microbial lipid metabolism and platform strains for constructing advanced cell factories.
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