Biodegrading plastics with a synthetic non-biodegradable enzyme
Biodegrading plastics with a synthetic non-biodegradable enzyme
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使用合成的不可生物降解酶的生物降解塑料
DOI:
10.1016/j.chempr.2022.09.008
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发表时间:
2022-10
期刊:
影响因子:
23.5
通讯作者:
Wenjun Jiang
中科院分区:
文献类型:
--
作者:
Cong Guo;Li-Qun Zhang;Wenjun Jiang
Summary Biodegradation of plastics through the use of enzymes provides an attractive, environmentally friendly solution to dispose of and recycle plastic wastes. Although many natural and engineered plastic-degrading enzymes have been developed, their practical applications are hindered by their biodegradation in open environments. We reasoned that most popularly used plastics, such as polyethylene terephthalate (PET), are achiral and hence can be hydrolyzed by both the l- and d-amino acid versions of plastic-degrading enzymes. Here, we chemically synthesized a mirror-image version of the 231-aa PET hydrolase, which is capable of efficiently degrading a variety of plastics such as PET, polybutylene terephthalate (PBT), and polybutylene succinate (PBS) but meanwhile itself is resistant to biodegradation by soil extract and seawater from the environment. The synthetic mirror-image PET hydrolase demonstrates the potential of a new class of plastic-degrading, non-biodegradable mirror-image enzymes to help address the plastic pollution problem in our homochiral biosphere.
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