Towards bio-upcycling of polyethylene terephthalate.
Biopolymers
Metabolic engineering
Polyethylene terephthalate (PET) degradation
Pseudomonas putida
Synthetic biology
Journal
Metabolic engineering
ISSN: 1096-7184
Titre abrégé: Metab Eng
Pays: Belgium
ID NLM: 9815657
Informations de publication
Date de publication:
07 2021
07 2021
Historique:
received:
14
09
2020
revised:
24
02
2021
accepted:
13
03
2021
pubmed:
19
4
2021
medline:
25
11
2021
entrez:
18
4
2021
Statut:
ppublish
Résumé
Over 359 million tons of plastics were produced worldwide in 2018, with significant growth expected in the near future, resulting in the global challenge of end-of-life management. The recent identification of enzymes that degrade plastics previously considered non-biodegradable opens up opportunities to steer the plastic recycling industry into the realm of biotechnology. Here, the sequential conversion of post-consumer polyethylene terephthalate (PET) into two types of bioplastics is presented: a medium chain-length polyhydroxyalkanoate (PHA) and a novel bio-based poly(amide urethane) (bio-PU). PET films are hydrolyzed by a thermostable polyester hydrolase yielding highly pure terephthalate and ethylene glycol. The obtained hydrolysate is used directly as a feedstock for a terephthalate-degrading Pseudomonas umsongensis GO16, also evolved to efficiently metabolize ethylene glycol, to produce PHA. The strain is further modified to secrete hydroxyalkanoyloxy-alkanoates (HAAs), which are used as monomers for the chemo-catalytic synthesis of bio-PU. In short, a novel value-chain for PET upcycling is shown that circumvents the costly purification of PET monomers, adding technological flexibility to the global challenge of end-of-life management of plastics.
Identifiants
pubmed: 33865980
pii: S1096-7176(21)00047-1
doi: 10.1016/j.ymben.2021.03.011
pii:
doi:
Substances chimiques
Plastics
0
Polyethylene Terephthalates
0
Hydrolases
EC 3.-
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
167-178Informations de copyright
Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.