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Genetic variability of psychrotolerant Acidithiobacillus ferrivorans revealed by (meta)genomic analysis.
Universidad Andrés Bello, Santiago, Chile.
Universidad Andrés Bello, Santiago, Chile.
Universidad Andrés Bello, Santiago, Chile.
Center for Systems Biotechnology, Santiago, Chile.
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2014 (English)In: Research in Microbiology, ISSN 0923-2508, Vol. 165, no 9, 726-734 p.Article in journal (Refereed) Published
Abstract [en]

Acidophilic microorganisms inhabit low pH environments such as acid mine drainage that is generated when sulfide minerals are exposed to air. The genome sequence of the psychrotolerant Acidithiobacillus ferrivorans SS3 was compared to a metagenome from a low temperature acidic stream dominated by an A. ferrivorans-like strain. Stretches of genomic DNA characterized by few matches to the metagenome, termed 'metagenomic islands', encoded genes associated with metal efflux and pH homeostasis. The metagenomic islands were enriched in mobile elements such as phage proteins, transposases, integrases and in one case, predicted to be flanked by truncated tRNAs. Cus gene clusters predicted to be involved in copper efflux and further Cus-like RND systems were predicted to be located in metagenomic islands and therefore, constitute part of the flexible gene complement of the species. Phylogenetic analysis of Cus clusters showed both lineage specificity within the Acidithiobacillus genus as well as niche specificity associated with an acidic environment. The metagenomic islands also contained a predicted copper efflux P-type ATPase system and a polyphosphate kinase potentially involved in polyphosphate mediated copper resistance. This study identifies genetic variability of low temperature acidophiles that likely reflects metal resistance selective pressures in the copper rich environment.

Place, publisher, year, edition, pages
2014. Vol. 165, no 9, 726-734 p.
National Category
Microbiology
Research subject
Natural Science, Microbiology
Identifiers
URN: urn:nbn:se:lnu:diva-37349DOI: 10.1016/j.resmic.2014.08.005ISI: 000347660400004PubMedID: 25172573OAI: oai:DiVA.org:lnu-37349DiVA: diva2:750405
Available from: 2014-09-29 Created: 2014-09-29 Last updated: 2016-11-30Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • fi-FI
  • nn-NO
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Output format
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  • asciidoc
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