Cited by 304Microbial bioremediation and biosurfactantsbiodegradable polymer synthesis and propertiesMicroplastics and Plastic Pollution

Biodegradation of Polyethylene by a Soil Bacterium and AlkB Cloned Recombinant Cell

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Gyung Yoon, Moon, Jeong Jeon, Hyun, Nam Kim, Mal·2012·Journal of Bioremediation & Biodegradation

Abstract

A mesophilic bacterium capable of Low-Molecular-Weight Polyethylene (LMWPE) biodegradation was isolated from a beach soil having been contaminated extensively with crude oil. The isolated strain was rod-shaped gram negative bacterium and was identified as Pseudomonas sp. E4 through the 16S rDNA sequencing. The biodegradability test in the compost inoculated with the isolated strain for LMWPE having weight-average-molecularweight (Mw) in the range of 1,700~23,700 indicated that 4.9~28.6 % of the carbon was mineralized into CO2 after 80 days at 37°C. The biodegradability decreased with increase in Mw of LMWPE. In comparison to other previous works which reported biodegradation of pre-oxidized polyethylene, we investigated biodegradation of non-oxidized LMWPE whose Mw was well above the Mw upper limit penetrable through microbial membrane. The smooth surface of LMWPE sheet became eroded as a result of the biodegradation, and the degree of the surface erosion became more pronounced for LMWPE with lower molecular weight in line with the biodegradability test results. The alkane hydroxylase gene (alkB) of Pseudomonas sp. E4 was expressed in Escherichia coli BL21 and the recombinant E. coli BL21 mineralized 19.3% of the carbon of LMWPE into CO2 during the biodegradation in the compost at 37°C for 80 days, while the recipient cell was not active at all toward the LMWPE biodegradation, indicating that the alkB from Pseudomonas sp. E4 plays a central role in the LMWPE degradation even in the absence of the other specific enzymes like rubredoxin and rubredoxin reductase.

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  • The alkB gene coding for a monooxygenase plays a central role in PE degradation mediated by a Pseudomonas strain.

    “The alkB gene coding for a monooxygenase was identied to play a central role in PE degradation mediated by a Pseudomonas strain.116”

    From The fate of plastic in the ocean environment – a minireview (2021) · cites this paper as [116]

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Authors
Gyung Yoon, M., Jeong Jeon, H., & Nam Kim, M.
Venue
Journal of Bioremediation & Biodegradation
Published
2012
Volume
03
Issue
04
ISSN
2155-6199 (ISSN-L)
OpenAlex
W2146679743
Cited by
304
References
46
Citations by year
2026: 13 · 2025: 40 · 2024: 48 · 2023: 41 · 2022: 55 · 2021: 36 · 2020: 26 · 2019: 17 · 2018: 8 · 2017: 4 · 2016: 3 · 2015: 6 · 2014: 4 · 2013: 2 · 2012: 1
FWCI
3.42
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
Journal of Bioremediation & Biodegradation (publishedVersion, cc-by)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microbial bioremediation and biosurfactants
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
Keywords
polyethylene biodegradation, low molecular weight polyethylene, soil bacteria, molecular weight dependence, surface erosion, carbon mineralization

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