Determinants of copper resistance in Acidithiobacillus ferrivorans ACH isolated from the Chilean altiplano

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dc.contributor.authorBarahona, S.
dc.contributor.authorCastro-Severyn, J.
dc.contributor.authorDorador, C.
dc.contributor.authorSaavedra, C.
dc.contributor.authorRemonsellez, F.
dc.date.accessioned2021-09-15T15:52:43Z
dc.date.available2021-09-15T15:52:43Z
dc.date.issued2020-08
dc.descriptionIndexación; Scopus.es
dc.description.abstractThe use of microorganisms in mining processes is a technology widely employed around the world. Leaching bacteria are characterized by having resistance mechanisms for several metals found in their acidic environments, some of which have been partially described in the Acidithiobacillus genus (mainly on ferrooxidans species). However, the response to copper has not been studied in the psychrotolerant Acidithiobacillus ferrivorans strains. Therefore, we propose to elucidate the response mechanisms of A. ferrivorans ACH to high copper concentrations (0–800 mM), describing its genetic repertoire and transcriptional regulation. Our results show that A. ferrivorans ACH can grow in up to 400 mM of copper. Moreover, we found the presence of several copper-related makers, belonging to cop and cus systems, as well as rusticyanins and periplasmatic acop protein in the genome. Interestingly, the ACH strain is the only one in which we find three copies of copB and copZ genes. Moreover, transcriptional expression showed an up-regulation response (acop, copZ, cusA, rusA, and rusB) to high copper concentrations. Finally, our results support the important role of these genes in A. ferrivorans copper stress resistance, promoting the use of the ACH strain in industrial leaching under low temperatures, which could decrease the activation times of oxidation processes and the energy costs. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.es
dc.description.urihttps://www.mdpi.com/2073-4425/11/8/844
dc.identifier.citationGenes Open Access Volume 11, Issue 8, Pages 1 - 19 August 2020 Article number 844es
dc.identifier.doi10.3390/genes11080844
dc.identifier.issn2073-4425
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/20273
dc.language.isoenes
dc.publisherMDPI AGes
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectA. ferrivorans ACHes
dc.subjectBioleachinges
dc.subjectChilean Altiplanoes
dc.subjectCopper resistancees
dc.titleDeterminants of copper resistance in Acidithiobacillus ferrivorans ACH isolated from the Chilean altiplanoes
dc.typeArtículoes
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