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Potential of tellurite resistance in heterotrophic bacteria from mining environments

Untreated mining wastes and improper disposal of high-tech devices generate an environmental increase of bioavailable metalloids, exerting stress on autochthonous microbial populations. Tellurium is a metalloid, an element with raising economic importance; nevertheless, its interaction with living o...

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Autores principales: Farias, Pedro, Francisco, Romeu, Morais, Paula V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9240799/
https://www.ncbi.nlm.nih.gov/pubmed/35784792
http://dx.doi.org/10.1016/j.isci.2022.104566
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author Farias, Pedro
Francisco, Romeu
Morais, Paula V.
author_facet Farias, Pedro
Francisco, Romeu
Morais, Paula V.
author_sort Farias, Pedro
collection PubMed
description Untreated mining wastes and improper disposal of high-tech devices generate an environmental increase of bioavailable metalloids, exerting stress on autochthonous microbial populations. Tellurium is a metalloid, an element with raising economic importance; nevertheless, its interaction with living organisms is not yet fully understood. Here we characterized aerobic heterotrophic bacteria, isolated from high metal-content mining residues, able to resist/reduce tellurite into tellurium structures and to determine the presence of confirmed tellurite resistance genetic determinants in resistant strains. We identified over 50 tellurite-resistant strains, among 144 isolates, eight strains reduced tellurite to tellurium at different rates, with the concomitant production of tellurium deposits. Most tellurite resistance genes were found in strains from Bacillales, with the prevalence of genes of the ter operon. This work demonstrated that bacterial isolates, from environments with a persistent selective pressure, are potential candidates for uncovering strategies for tellurite resistance and/or production of valuable Te-containing materials.
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spelling pubmed-92407992022-06-30 Potential of tellurite resistance in heterotrophic bacteria from mining environments Farias, Pedro Francisco, Romeu Morais, Paula V. iScience Article Untreated mining wastes and improper disposal of high-tech devices generate an environmental increase of bioavailable metalloids, exerting stress on autochthonous microbial populations. Tellurium is a metalloid, an element with raising economic importance; nevertheless, its interaction with living organisms is not yet fully understood. Here we characterized aerobic heterotrophic bacteria, isolated from high metal-content mining residues, able to resist/reduce tellurite into tellurium structures and to determine the presence of confirmed tellurite resistance genetic determinants in resistant strains. We identified over 50 tellurite-resistant strains, among 144 isolates, eight strains reduced tellurite to tellurium at different rates, with the concomitant production of tellurium deposits. Most tellurite resistance genes were found in strains from Bacillales, with the prevalence of genes of the ter operon. This work demonstrated that bacterial isolates, from environments with a persistent selective pressure, are potential candidates for uncovering strategies for tellurite resistance and/or production of valuable Te-containing materials. Elsevier 2022-06-09 /pmc/articles/PMC9240799/ /pubmed/35784792 http://dx.doi.org/10.1016/j.isci.2022.104566 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Farias, Pedro
Francisco, Romeu
Morais, Paula V.
Potential of tellurite resistance in heterotrophic bacteria from mining environments
title Potential of tellurite resistance in heterotrophic bacteria from mining environments
title_full Potential of tellurite resistance in heterotrophic bacteria from mining environments
title_fullStr Potential of tellurite resistance in heterotrophic bacteria from mining environments
title_full_unstemmed Potential of tellurite resistance in heterotrophic bacteria from mining environments
title_short Potential of tellurite resistance in heterotrophic bacteria from mining environments
title_sort potential of tellurite resistance in heterotrophic bacteria from mining environments
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9240799/
https://www.ncbi.nlm.nih.gov/pubmed/35784792
http://dx.doi.org/10.1016/j.isci.2022.104566
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