Journal
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
Volume 342, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123404
Keywords
PET recycling; Protein engineering; Enzymatic degradation; Microbial dark matter; AlphaFold; High -throughput screening
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Enzymatic PET recycling is a promising alternative to conventional methods, but requires optimization of PET hydrolases through engineering. A workflow integrating various methods can accelerate the discovery of PET-degrading enzymes, leading to the development of innovative plastic recycling techniques.
Polyethylene terephthalate (PET) is a widely used polyester due to its beneficial material properties and low cost. However, PET contributes significantly to the growing problem of plastic waste pollution. Enzymatic PET recycling has emerged as a promising alternative to conventional mechanical and chemical recycling methods. While many PET hydrolases - belonging to the alpha/beta-hydrolase fold superfamily - have been discovered, the wild -type enzymes obtained from natural sources are not optimal for industrial conditions and need to be optimized through rational design or directed evolution to improve their efficiency and stability. This Perspective sum-marizes case studies of engineered PET hydrolases and proposes a workflow that tightly integrates a variety of in silico and high-throughput approaches for biochemical and structural characterization to accelerate the discovery of PET-degrading enzymes, also with novel structural scaffolds. These biocatalysts could be candidates for developing further innovative plastic recycling techniques.
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