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Differential protein expression during growth on model and commercial mixtures of naphthenic acids in Pseudomonas fluorescens Pf-5

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dc.contributor.authorMcKew, Boyd A.
dc.contributor.authorJohnson, Richard
dc.contributor.authorClothier, Lindsay
dc.contributor.authorSkeels, Karl
dc.contributor.authorRoss, Matthew S.
dc.contributor.authorMetodiev, Metodi
dc.contributor.authorFrenzel, Max
dc.contributor.authorGieg, Lisa M.
dc.contributor.authorMartin, Jonathan W.
dc.contributor.authorHough, Michael A.
dc.contributor.authorWhitby, Corinne
dc.date.accessioned2022-01-18
dc.date.accessioned2022-05-31T01:45:10Z
dc.date.available2022-05-31T01:45:10Z
dc.date.issued2021
dc.description.abstractNaphthenic acids (NAs) are carboxylic acids with the formula (CnH2n+ZO2) and are among the most toxic, persistent constituents of oil sands process-affected waters (OSPW), produced during oil sands extraction. Currently, the proteins and mechanisms involved in NA biodegradation are unknown. Using LC-MS/ MS shotgun proteomics, we identified proteins overexpressed during the growth of Pseudomonas fluorescens Pf-5 on a model NA (4′-n-butylphenyl)- 4-butanoic acid (n-BPBA) and commercial NA mixture (Acros). By day 11, >95% of n-BPBA was degraded. With Acros, a 17% reduction in intensity occurred with 10–18 carbon compounds of the Z family −2 to −14 (major NA species in this mixture). A total of 554 proteins (n-BPBA) and 631 proteins (Acros) were overexpressed during growth on NAs, including several transporters (e.g., ABC transporters), suggesting a cellular protective response from NA toxicity. Several proteins associated with fatty acid, lipid, and amino acid metabolism were also overexpressed, including acyl-CoA dehydrogenase and acyl-CoA thioesterase II, which catalyze part of the fatty acid beta-oxidation pathway. Indeed, multiple enzymes involved in the fatty acid oxidation pathway were upregulated. Given the presumed structural similarity between alkyl-carboxylic acid side chains and fatty acids, we postulate that P. fluorescens Pf-5 was using existing fatty acid catabolic pathways (among others) during NA degradation.
dc.format.extent2.18MB
dc.format.mimetypePDF
dc.identifier.citationMcKew, B.A., Johnson, R., Clothier, L., Skeels, K., Ross, M.S., Metodiev, M., Frenzel, M., Gieg, L.M., Martin, J.W., Hough, M.A. and Whitby, C. (2021), Differential protein expression during growth on model and commercial mixtures of naphthenic acids in Pseudomonas fluorescens Pf-5. MicrobiologyOpen, 10, article e1196. https://doi.org/10.1002/mbo3.1196
dc.identifier.doihttps://doi.org/10.1002/mbo3.1196
dc.identifier.urihttps://hdl.handle.net/20.500.14078/2551
dc.languageEnglish
dc.language.isoen
dc.rightsAttribution (CC BY)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectnaphthenic acids
dc.subjectoil sands process-affected water
dc.subjectproteomics
dc.subjectPseudomonas fluorescens
dc.subjecttailing ponds
dc.subjecttoxicity
dc.titleDifferential protein expression during growth on model and commercial mixtures of naphthenic acids in Pseudomonas fluorescens Pf-5en
dc.typeArticle

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