Anaerobic naphthalene degradation by sulfate-reducing Desulfobacteraceae from various anoxic aquifers

FEMS Microbiology Ecology
Steffen KümmelCarsten Vogt

Abstract

Polycyclic aromatic hydrocarbons (PAH) are widespread and persistent environmental contaminants, especially in oxygen-free environments. The occurrence of anaerobic PAH-degrading bacteria and their underlying metabolic pathways are rarely known. In this study, PAH degraders were enriched in laboratory microcosms under sulfate-reducing conditions using groundwater and sediment samples from four PAH-contaminated aquifers. Five enrichment cultures were obtained showing sulfate-dependent naphthalene degradation. Mineralization of naphthalene was demonstrated by the formation of sulfide concomitant with the depletion of naphthalene and the development of (13)C-labeled CO2 from [(13)C6]-naphthalene. 16S rRNA gene and metaproteome analyses revealed that organisms related to Desulfobacterium str. N47 were the main naphthalene degraders in four enrichment cultures. Protein sequences highly similar to enzymes of the naphthalene degradation pathway of N47 were identified, suggesting that naphthalene was activated by a carboxylase, and that the central metabolite 2-naphthoyl-CoA was further reduced by two reductases. The data indicate an importance of members of the family Desulfobacteraceae for naphthalene degradation under sulfate-reduci...Continue Reading

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Citations

Sep 22, 2015·Environmental Science & Technology·Meiying XuJizhong Zhou
Feb 9, 2016·Environmental Science & Technology·Steffen KümmelCarsten Vogt
Apr 27, 2016·Current Opinion in Biotechnology·Nico JehmlichMartin von Bergen
Nov 24, 2016·Environmental Science and Pollution Research International·Sandra SanchesMaria Teresa Barreto Crespo
Jul 18, 2019·Environmental Microbiology·Magali Ranchou-PeyruseAnthony Ranchou-Peyruse
Mar 23, 2017·Applied Microbiology and Biotechnology·Marcelle J van der WaalsJan Gerritse
Nov 24, 2016·Frontiers in Microbiology·Sophie-Marie Martirani-Von AbercronSilvia Marqués
Jun 27, 2018·Microorganisms·Sarah J WolfsonLily Y Young
Mar 2, 2021·Environmental Pollution·Juan F Mujica-AlarconStephen A Rolfe
Apr 2, 2021·FEMS Microbiology Ecology·Bronwyn C CampbellSimon C George
Jun 23, 2021·The ISME Journal·Lea C WunderMichael W Friedrich
Aug 25, 2021·Chemosphere·Lucélia CabralLara Durães Sette

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