Insights from the genomes of microbes thriving in uranium-enriched sediments

Brodie Sutcliffe, Anthony A. Chariton, Andrew J. Harford, Grant C. Hose, Sarah Stephenson, Paul Greenfield, David J. Midgley, Ian T. Paulsen*

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Elevated uranium dose (4 g kg−1) causes a shift in billabong sediment communities that result in the enrichment of five bacterial species. These taxa include Geobacter, Geothrix and Dyella species, as well as a novel—potentially predatory—Bacteroidetes species, and a new member of class Anaerolineae (Chloroflexi). Additionally, a population of methanogenic Methanocella species was also identified. Genomic reconstruction and metabolic examination of these taxa reveal a host of divergent life strategies and putative niche partitioning. Resistance-nodulation-division heavy metal efflux (RND-HME) transporters are implicated as potential uranium tolerance strategies among the bacterial taxa. Potential interactions, uranium tolerance and ecologically relevant catabolism are presented in a conceptual model of life in this environment.

Original languageEnglish
Pages (from-to)970–984
Number of pages15
JournalMicrobial Ecology
Volume75
Issue number4
DOIs
Publication statusPublished - May 2018

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Keywords

  • Genomes
  • Sediment
  • Metagenome

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