Transcriptomic response of Gordonia sp. strain NB4-1Y when provided with 6:2 fluorotelomer sulfonamidoalkyl betaine or 6:2 fluorotelomer sulfonate as sole sulfur source. 2020

Eric M Bottos, and Ebtihal Y Al-Shabib, and Dayton M J Shaw, and Breanne M McAmmond, and Aditi Sharma, and Danae M Suchan, and Andrew D S Cameron, and Jonathan D Van Hamme
Department of Biological Sciences, Thompson Rivers University, Kamloops, BC, V2C 0C8, Canada.

Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are environmental contaminants of concern. We previously described biodegradation of two PFAS that represent components and transformation products of aqueous film-forming foams (AFFF), 6:2 fluorotelomer sulfonamidoalkyl betaine (6:2 FTAB) and 6:2 fluorotelomer sulfonate (6:2 FTSA), by Gordonia sp. strain NB4-1Y. To identify genes involved in the breakdown of these compounds, the transcriptomic response of NB4-1Y was examined when grown on 6:2 FTAB, 6:2 FTSA, a non-fluorinated analog of 6:2 FTSA (1-octanesulfonate), or MgSO4, as sole sulfur source. Differentially expressed genes were identified as those with ± 1.5 log2-fold-differences (± 1.5 log2FD) in transcript abundances in pairwise comparisons. Transcriptomes of cells grown on 6:2 FTAB and 6:2 FTSA were most similar (7.9% of genes expressed ± 1.5 log2FD); however, several genes that were expressed in greater abundance in 6:2 FTAB treated cells compared to 6:2 FTSA treated cells were noted for their potential role in carbon-nitrogen bond cleavage in 6:2 FTAB. Responses to sulfur limitation were observed in 6:2 FTAB, 6:2 FTSA, and 1-octanesulfonate treatments, as 20 genes relating to global sulfate stress response were more highly expressed under these conditions compared to the MgSO4 treatment. More highly expressed oxygenase genes in 6:2 FTAB, 6:2 FTSA, and 1-octanesulfonate treatments were found to code for proteins with lower percent sulfur-containing amino acids compared to both the total proteome and to oxygenases showing decreased expression. This work identifies genetic targets for further characterization and will inform studies aimed at evaluating the biodegradation potential of environmental samples through applied genomics.

UI MeSH Term Description Entries
D005466 Fluorocarbons Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions, and fluorocarbon blood substitutes. Perfluorinated and related polyfluorinated chemicals are referred to as PFAS and are defined as chemicals with at least two adjacent carbon atoms, where one carbon is fully fluorinated and the other is at least partially fluorinated. Fluorocarbon,Fluorocarbon Emulsion,Fluorocarbon Emulsions,Fluorotelomer Phosphate Esters,N-Alkyl Perfluoroalkyl Sulfonamido Carboxylates,PFAS Per- and Polyfluoroalkyl Substances,PFC Perfluorinated Chemicals,PFECAs Perfluoropolyether Carboxylic Acids,Per- and Polyfluoroalkyl Substances,Perfluoroalkane Sulfonamides,Perfluoroalkyl Carboxylates,Perfluoroalkyl Ether Carboxylates,Perfluoroalkyl Polyether Carboxylates,Perfluorocarbon,Perfluorocarbons,Perfluoropolyether Carboxylic Acids,Polyfluorocarbons,Fluorinated Telomer Alcohols,Fluoro-Telomer Alcohols,Polyfluorinated Telomer Alcohols,Telomer Fluorocarbons,Acids, Perfluoropolyether Carboxylic,Alcohols, Fluorinated Telomer,Alcohols, Fluoro-Telomer,Alcohols, Polyfluorinated Telomer,Carboxylates, Perfluoroalkyl,Carboxylates, Perfluoroalkyl Ether,Carboxylates, Perfluoroalkyl Polyether,Carboxylic Acids, Perfluoropolyether,Chemicals, PFC Perfluorinated,Emulsion, Fluorocarbon,Emulsions, Fluorocarbon,Esters, Fluorotelomer Phosphate,Ether Carboxylates, Perfluoroalkyl,Fluoro Telomer Alcohols,Fluorocarbons, Telomer,N Alkyl Perfluoroalkyl Sulfonamido Carboxylates,PFAS Per and Polyfluoroalkyl Substances,Per and Polyfluoroalkyl Substances,Perfluorinated Chemicals, PFC,Phosphate Esters, Fluorotelomer,Polyether Carboxylates, Perfluoroalkyl,Sulfonamides, Perfluoroalkane,Telomer Alcohols, Fluorinated,Telomer Alcohols, Polyfluorinated
D001622 Betaine A naturally occurring compound that has been of interest for its role in osmoregulation. As a drug, betaine hydrochloride has been used as a source of hydrochloric acid in the treatment of hypochlorhydria. Betaine has also been used in the treatment of liver disorders, for hyperkalemia, for homocystinuria, and for gastrointestinal disturbances. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1341) Lycine,Oxyneurine,Acidin-Pepsin,Betaine Hydrochloride,C.B.B.,Citrate de Bétaïne Beaufour,Citrate de Bétaïne UPSA,Cystadane,Glycine Betaine,Hepastyl,Novobetaine,Scorbo-bétaïne,Stea-16,Acidin Pepsin,AcidinPepsin,Betaine, Glycine,Hydrochloride, Betaine,Scorbo bétaïne,Scorbobétaïne,Stea 16,Stea16
D001673 Biodegradation, Environmental Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers. Bioremediation,Phytoremediation,Natural Attenuation, Pollution,Environmental Biodegradation,Pollution Natural Attenuation
D013455 Sulfur An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine. Sulfur-16,Sulfur 16
D014874 Water Pollutants, Chemical Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water. Chemical Water Pollutants,Landfill Leachate,Leachate, Landfill,Pollutants, Chemical Water
D059467 Transcriptome The pattern of GENE EXPRESSION at the level of genetic transcription in a specific organism or under specific circumstances in specific cells. Transcriptomes,Gene Expression Profiles,Gene Expression Signatures,Transcriptome Profiles,Expression Profile, Gene,Expression Profiles, Gene,Expression Signature, Gene,Expression Signatures, Gene,Gene Expression Profile,Gene Expression Signature,Profile, Gene Expression,Profile, Transcriptome,Profiles, Gene Expression,Profiles, Transcriptome,Signature, Gene Expression,Signatures, Gene Expression,Transcriptome Profile

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