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• W2593194167 abstract "Environmental endocrine‐disrupting compounds (EDCs) are a growing concern as studies reveal their persistence and detrimental effects on wildlife. Microorganisms are known to affect the transformation of steroid EDCs; however, the diversity of estrogen‐degrading microorganisms and the range of transformations they mediate remain relatively little studied. In mesocosms, low concentrations of added estrone (E1) and 17β‐estradiol (E2) were removed by indigenous microorganisms from Las Vegas Wash water within 2 wk. Three bacterial isolates, Rhizobium sp. strain LVW‐9, Sphingopyxis sp. strain LVW‐12, and Pseudomonas sp. strain LVW‐PC, were enriched from Las Vegas Wash water on E1 and E2 and used for EDC transformation studies. In the presence of alternative carbon sources, LVW‐9 and LVW‐12 catalyzed near‐stoichiometric reduction of E1 to E2 but subsequently reoxidized E2 back to E1; whereas LVW‐PC minimally reduced E1 to E2 but effectively oxidized E2 to E1 after a 20‐d lag. In the absence of alternative carbon sources, LVW‐12 and LVW‐PC oxidized E2 to E1. This report documents the rapid and sometimes reversible microbial transformation of E1 and E2 and the slow degradation of 17α‐ethinylestradiol in urban stream water and extends the list of known estrogen‐transforming bacteria to the genera Rhizobium and Sphingopyxis . These results suggest that discharge of steroid estrogens via wastewater could be reduced through tighter control of redox conditions and may assist in future risk assessments detailing the environmental fate of estrogens through evidence that microbial estrogen transformations may be affected by environmental conditions or growth status. Core Ideas Estrone and 17β‐estradiol were rapidly degraded in Las Vegas Wash water. Microbial genera involved included Rhizobium , Sphingopyxis , and Pseudomonas . Microbial isolates catalyzed the reversible reduction of estrone to 17β‐estradiol. Oxidation‐reduction activities on estrogens may be controlled by redox status." @default.
• W2593194167 created "2017-03-16" @default.
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• W2593194167 date "2017-03-01" @default.
• W2593194167 modified "2023-10-06" @default.
• W2593194167 title "Reversible Reduction of Estrone to 17β‐Estradiol by <i>Rhizobium</i>, <i>Sphingopyxis</i>, and <i>Pseudomonas</i> Isolates from the Las Vegas Wash" @default.
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• W2593194167 doi "https://doi.org/10.2134/jeq2016.08.0286" @default.
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