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• W4323808568 abstract "Abstract Biological recycling of PET waste has been extensively investigated recently to tackle plastic waste pollution, and ethylene glycol (EG) is one of the main building blocks recovered from this process. Wild‐type Yarrowia lipolytica IMUFRJ 50682 can be a biocatalyst to biodepolymerize PET. Herein, we report its ability to perform oxidative biotransformation of EG into glycolic acid (GA): a higher value‐added chemical with varied industrial applications. We found that this yeast tolerates high EG concentrations (up to 2 M) based on maximum non‐inhibitory concentration (MNIC) tests. Whole‐cell biotransformation assays using resting yeast cells showed GA production uncoupled to cell growth metabolism, and 13 C nuclear magnetic resonance (NMR) analysis confirmed GA production. Moreover, higher agitation speed (450 vs. 350 rpm) resulted in a 1.12‐fold GA production improvement (from 352 to 429.5 mM) during Y. lipolytica cultivation in bioreactors after 72 h. GA was constantly accumulated in the medium, suggesting that this yeast may also share an incomplete oxidation pathway (i.e., it is not metabolized to carbon dioxide) as seen in acetic acid bacterial group. Additional assays using higher chain‐length diols (1,3‐propanediol, 1,4‐butanediol, and 1,6‐hexanediol) revealed that C4 and C6 diols were more cytotoxic, suggesting that they underwent different pathways in the cells. We found that this yeast consumed extensively all these diols, however, 13 C NMR analysis from supernatant identified solely the presence of 4‐hydroxybutanoic acid from 1,4‐butanediol, along with GA from EG oxidation. Findings reported herein reveal a potential route for PET upcycling to a higher value‐added product." @default.
• W4323808568 created "2023-03-11" @default.
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• W4323808568 date "2023-04-17" @default.
• W4323808568 modified "2023-10-17" @default.
• W4323808568 title "Biotransformation of ethylene glycol to glycolic acid by <i>Yarrowia lipolytica</i>: A route for poly(ethylene terephthalate) (PET) upcycling" @default.
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• W4323808568 doi "https://doi.org/10.1002/biot.202200521" @default.
• W4323808568 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36896762" @default.
• W4323808568 hasPublicationYear "2023" @default.
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