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Frontiers in Bioengineering and Biotechnology
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Engineering the Yeast Yarrowia lipolytica for Production of Polylactic Acid Homopolymer

Authors: Sophie Lajus; Simon Dusséaux; Jonathan Verbeke; Coraline Rigouin; Zhongpeng Guo; Maria Fatarova; Floriant Bellvert; +6 Authors

Engineering the Yeast Yarrowia lipolytica for Production of Polylactic Acid Homopolymer

Abstract

Polylactic acid is a plastic polymer widely used in different applications from printing filaments for 3D printer to mulching films in agriculture, packaging materials, etc. Here, we report the production of poly-D-lactic acid (PDLA) in an engineered yeast strain of Yarrowia lipolytica. Firstly, the pathway for lactic acid consumption in this yeast was identified and interrupted. Then, the heterologous pathway for PDLA production, which contains a propionyl-CoA transferase (PCT) converting lactic acid into lactyl-CoA, and an evolved polyhydroxyalkanoic acid (PHA) synthase polymerizing lactyl-CoA, was introduced into the engineered strain. Among the different PCT proteins that were expressed in Y. lipolytica, the Clostridium propionicum PCT exhibited the highest efficiency in conversion of D-lactic acid to D-lactyl-CoA. We further evaluated the lactyl-CoA and PDLA productions by expressing this PCT and a variant of Pseudomonas aeruginosa PHA synthase at different subcellular localizations. The best PDLA production was obtained by expressing the PCT in the cytosol and the variant of PHA synthase in peroxisome. PDLA homopolymer accumulation in the cell reached 26 mg/g-DCW, and the molecular weights of the polymer (Mw = 50.5 × 103 g/mol and Mn = 12.5 × 103 g/mol) were among the highest reported for an in vivo production.

Keywords

Yarrowia lipolytica, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Bioengineering and Biotechnology, PHA synthase, polylactic acid, cellular compartments, CoA analysis, TP248.13-248.65, 620, [SDV.BIO] Life Sciences [q-bio]/Biotechnology, Biotechnology

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
37
Top 10%
Average
Top 10%
Green
gold
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