Polyvinyl chloride degradation by a bacterium isolated from the gut of insect larvae

Zhe Zhang, Haoran Peng, Dongchen Yang, Guoqing Zhang, Jinlin Zhang and Feng Ju ()
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Zhe Zhang: Westlake University
Haoran Peng: Westlake University
Dongchen Yang: Hebei Agricultural University
Guoqing Zhang: Westlake University
Jinlin Zhang: Hebei Agricultural University
Feng Ju: Westlake University

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: Abstract Evidence for microbial degradation of polyvinyl chloride (PVC) has previously been reported, but little is known about the degrading strains and enzymes. Here, we isolate a PVC-degrading bacterium from the gut of insect larvae and shed light on the PVC degradation pathway using a multi-omic approach. We show that the larvae of an insect pest, Spodoptera frugiperda, can survive by feeding on PVC film, and this is associated with enrichment of Enterococcus, Klebsiella and other bacteria in the larva’s gut microbiota. A bacterial strain isolated from the larval intestine (Klebsiella sp. EMBL-1) is able to depolymerize and utilize PVC as sole energy source. We use genomic, transcriptomic, proteomic, and metabolomic analyses to identify genes and proteins potentially involved in PVC degradation (e.g., catalase-peroxidase, dehalogenases, enolase, aldehyde dehydrogenase and oxygenase), and propose a PVC biodegradation pathway. Furthermore, enzymatic assays using the purified catalase-peroxidase support a role in PVC depolymerization.

Date: 2022
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DOI: 10.1038/s41467-022-32903-y

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