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- W4200106899 endingPage "106401" @default.
- W4200106899 startingPage "106401" @default.
- W4200106899 abstract "Cometabolic oxidation involves the oxidation of chemicals often by monooxygenases or dioxygenases and can be a removal process for environmental contaminants such as trichloroethene (TCE) or 1,4-dioxane. Information on the occurrence of these genes and their associated microorganisms in environmental samples has the potential to enhance our understanding of contaminant removal. The overall aims were to 1) ascertain which genes encoding for monooxygenases (from methanotrophs, ammonia oxidizing bacteria and toluene/phenol oxidizers) and other key enzymes are present in soil microcosms and 2) determine which phylotypes are associated with those genes. The approach involved a predictive tool called PICRUSt2 and 16S rRNA gene amplicon datasets from two previous soil microcosm studies. The following targets from the KEGG database were examined: pmo/amo, mmo, dmp/pox/tomA, tmo/tbu/tou, bssABC (and downstream genes), tod, xylM, xylA, gst, dhaA, catE, dbfA1, dbfA2 and phenol 2-monooxygenase. A large number of phylotypes were associated with pmo/amo, while mmo was linked to only five. Several phylotypes were associated with both pmo/amo and mmo. The most dominant microorganism predicted for mmoX was Mycobacterium (also predicted for pmo/amo). A large number of phylotypes were associated with all six genes from the dmp/pox/tomA KEGG group. The taxonomic associations predicted for the tmo/tbu/tou KEGG group were more limited. In both datasets, Geobacter was a key phylotype for benzylsuccinate synthase. The dioxygenase-mediated toluene degradation pathway encoded by todC1C2BA was largely absent, as were the genes (xylM, xylA) encoding for xylene monooxygenase. All other genes investigated were predicted to be present and were associated with a number of microorganisms. Overall, the analysis predicted the genes encoding for sMMO (mmo), T3MO/T3MO/ToMO (tmo/tbu/tou) and benzylsuccinate synthase (bssABC) are present for a limited number of phylotypes compared to those encoding for pMMO/AMO (pmo/amo) and phenol monooxygenase/T2MO (dmp/poxA/tomA). These findings suggest in soils contaminant removal via pMMO/AMO or phenol monooxygenase/T2MO may be common because of the occurrence of these enzymes with a large number of phylotypes." @default.
- W4200106899 created "2021-12-31" @default.
- W4200106899 creator A5039830193 @default.
- W4200106899 creator A5048631117 @default.
- W4200106899 date "2022-02-01" @default.
- W4200106899 modified "2023-09-23" @default.
- W4200106899 title "Predicting the occurrence of monooxygenases and their associated phylotypes in soil microcosms" @default.
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