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Plasticizer degradation by marine bacterial isolates : a proteogenomic and metabolomic characterization
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Wright, Robyn J., Bosch, Rafael, Gibson, Matthew I. and Christie-Oleza, Joseph Alexander (2020) Plasticizer degradation by marine bacterial isolates : a proteogenomic and metabolomic characterization. Environmental Science & Technology, 54 (4). pp. 2244-2256. doi:10.1021/acs.est.9b05228 ISSN 0013-936X.
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WRAP-plasticizer-degradation-marine-isolates-metabolomic-Gibson-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3640Kb) | Preview |
Official URL: https://doi.org/10.1021/acs.est.9b05228
Abstract
Many commercial plasticizers are toxic endocrine-disrupting chemicals that are added to plastics during manufacturing and may leach out once they reach the environment. Traditional phthalic acid ester plasticizers (PAEs), such as dibutyl phthalate (DBP) and bis(2-ethyl hexyl) phthalate (DEHP), are now increasingly being replaced with more environmentally friendly alternatives, such as acetyl tributyl citrate (ATBC). While the metabolic pathways for PAE degradation have been established in the terrestrial environment, to our knowledge, the mechanisms for ATBC biodegradation have not been identified previously and plasticizer degradation in the marine environment remains underexplored. From marine plastic debris, we enriched and isolated microbes able to grow using a range of plasticizers and, for the first time, identified the pathways used by two phylogenetically distinct bacteria to degrade three different plasticizers (i.e., DBP, DEHP, and ATBC) via a comprehensive proteogenomic and metabolomic approach. This integrated multi-OMIC study also revealed the different mechanisms used for ester side-chain removal from the different plasticizers (esterases and enzymes involved in the β-oxidation pathway) as well as the molecular response to deal with toxic intermediates, that is, phthalate, and the lower biodegrading potential detected for ATBC than for PAE plasticizers. This study highlights the metabolic potential that exists in the biofilms that colonize plastics-the Plastisphere-to effectively biodegrade plastic additives and flags the inherent importance of microbes in reducing plastic toxicity in the environment.
| Item Type: | Journal Article | |||||||||||||||||||||||||||
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| Subjects: | G Geography. Anthropology. Recreation > GC Oceanography Q Science > QR Microbiology T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | |||||||||||||||||||||||||||
| SWORD Depositor: | Library Publications Router | |||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Plastic marine debris, Microplastics, Marine pollution, Phthalate esters -- Environmental aspects, Plasticizers , Marine bacteria | |||||||||||||||||||||||||||
| Journal or Publication Title: | Environmental Science & Technology | |||||||||||||||||||||||||||
| Publisher: | American Chemical Society | |||||||||||||||||||||||||||
| ISSN: | 0013-936X | |||||||||||||||||||||||||||
| Official Date: | 18 February 2020 | |||||||||||||||||||||||||||
| Dates: |
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| Volume: | 54 | |||||||||||||||||||||||||||
| Number: | 4 | |||||||||||||||||||||||||||
| Page Range: | pp. 2244-2256 | |||||||||||||||||||||||||||
| DOI: | 10.1021/acs.est.9b05228 | |||||||||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||||||||
| Date of first compliant deposit: | 24 January 2020 | |||||||||||||||||||||||||||
| Date of first compliant Open Access: | 24 January 2020 | |||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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