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Article: Genomic characterization, kinetics, and pathways of sulfamethazine biodegradation by Paenarthrobacter sp. A01

TitleGenomic characterization, kinetics, and pathways of sulfamethazine biodegradation by Paenarthrobacter sp. A01
Authors
KeywordsSulfamethazine
Biodegradation
Paenarthrobacter
Pathways
Sad genes
Issue Date2019
PublisherElsevier: Creative Commons Licenses. The Journal's web site is located at http://www.elsevier.com/locate/envint
Citation
Environment International, 2019, v. 131, article no. 104961 How to Cite?
AbstractBiodegradation is an important route for the removal of sulfamethazine (SMZ), one of the most commonly used sulfonamide antibiotics, in the environment. However, little information is known about the kinetics, products, and pathways of SMZ biodegradation owing to the complexity of its enzyme-based biotransformation processes. In this study, the SMZ-degrading strain A01 belonging to the genus Paenarthrobacter was isolated from SMZ-enriched activated sludge reactors. The bacterial cells were rod-shaped with transient branches 2.50–4.00 μm in length with most forming in a V-shaped arrangement. The genome size of Paenarthrobacter sp. A01 had a total length of 4,885,005 bp with a GC content of 63.5%, and it contained 104 contigs and 55 RNAs. The effects of pH, temperature, initial substrate concentration and additional carbon source on the biodegradation of SMZ were investigated. The results indicated that pH 6.0–7.8, 25 °C and the addition of 0.2 g/L sodium acetate favored the biodegradation, whereas a high concentration of SMZ, 500 mg/L, had an inhibitory effect. The biodegradation kinetics with SMZ as the sole carbon source or 0.2 g/L sodium acetate as the co-substrate fit the modified Gompertz model well with a correlation coefficient (R2) of 0.99. Three biodegradation pathways were proposed involving nine biodegradation products, among which C6H9N3O2S and C12H12N2 were two novel biodegradation products that have not been reported previously. Approximately 90.7% of SMZ was transformed to 2-amino-4, 6-dimethylpyrimidine. Furthermore, sad genes responsible for catabolizing sulfonamides were characterized in A01 with high similarities of 96.0%–100.0%. This study will fill the knowledge gap in the biodegradation of this ubiquitous micropollutant in the aquatic environment.
Persistent Identifierhttp://hdl.handle.net/10722/293307
ISSN
2023 Impact Factor: 10.3
2023 SCImago Journal Rankings: 3.015
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCao, L-
dc.contributor.authorZhang, J-
dc.contributor.authorZhao, R-
dc.contributor.authorDeng, Y-
dc.contributor.authorLiu, J-
dc.contributor.authorFu, W-
dc.contributor.authorLei, Y-
dc.contributor.authorZhang, T-
dc.contributor.authorLi, X-
dc.contributor.authorLi, B-
dc.date.accessioned2020-11-23T08:14:52Z-
dc.date.available2020-11-23T08:14:52Z-
dc.date.issued2019-
dc.identifier.citationEnvironment International, 2019, v. 131, article no. 104961-
dc.identifier.issn0160-4120-
dc.identifier.urihttp://hdl.handle.net/10722/293307-
dc.description.abstractBiodegradation is an important route for the removal of sulfamethazine (SMZ), one of the most commonly used sulfonamide antibiotics, in the environment. However, little information is known about the kinetics, products, and pathways of SMZ biodegradation owing to the complexity of its enzyme-based biotransformation processes. In this study, the SMZ-degrading strain A01 belonging to the genus Paenarthrobacter was isolated from SMZ-enriched activated sludge reactors. The bacterial cells were rod-shaped with transient branches 2.50–4.00 μm in length with most forming in a V-shaped arrangement. The genome size of Paenarthrobacter sp. A01 had a total length of 4,885,005 bp with a GC content of 63.5%, and it contained 104 contigs and 55 RNAs. The effects of pH, temperature, initial substrate concentration and additional carbon source on the biodegradation of SMZ were investigated. The results indicated that pH 6.0–7.8, 25 °C and the addition of 0.2 g/L sodium acetate favored the biodegradation, whereas a high concentration of SMZ, 500 mg/L, had an inhibitory effect. The biodegradation kinetics with SMZ as the sole carbon source or 0.2 g/L sodium acetate as the co-substrate fit the modified Gompertz model well with a correlation coefficient (R2) of 0.99. Three biodegradation pathways were proposed involving nine biodegradation products, among which C6H9N3O2S and C12H12N2 were two novel biodegradation products that have not been reported previously. Approximately 90.7% of SMZ was transformed to 2-amino-4, 6-dimethylpyrimidine. Furthermore, sad genes responsible for catabolizing sulfonamides were characterized in A01 with high similarities of 96.0%–100.0%. This study will fill the knowledge gap in the biodegradation of this ubiquitous micropollutant in the aquatic environment.-
dc.languageeng-
dc.publisherElsevier: Creative Commons Licenses. The Journal's web site is located at http://www.elsevier.com/locate/envint-
dc.relation.ispartofEnvironment International-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectSulfamethazine-
dc.subjectBiodegradation-
dc.subjectPaenarthrobacter-
dc.subjectPathways-
dc.subjectSad genes-
dc.titleGenomic characterization, kinetics, and pathways of sulfamethazine biodegradation by Paenarthrobacter sp. A01-
dc.typeArticle-
dc.identifier.emailDeng, Y: dengyu@hku.hk-
dc.identifier.emailZhang, T: zhangt@hkucc.hku.hk-
dc.identifier.emailLi, X: xlia@hkucc.hku.hk-
dc.identifier.authorityDeng, Y=rp02795-
dc.identifier.authorityZhang, T=rp00211-
dc.identifier.authorityLi, X=rp00222-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.envint.2019.104961-
dc.identifier.pmid31330364-
dc.identifier.scopuseid_2-s2.0-85069548683-
dc.identifier.hkuros319417-
dc.identifier.volume131-
dc.identifier.spagearticle no. 104961-
dc.identifier.epagearticle no. 104961-
dc.identifier.isiWOS:000493550200018-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0160-4120-

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