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The complete genome sequence for putative H 2 ‐ and S ‐oxidizer C andidatus Sulfuricurvum sp., assembled de novo from an aquifer‐derived metagenome
Author(s) -
Handley Kim M.,
Bartels Daniela,
O'Loughlin Edward J.,
Williams Kenneth H.,
Trimble William L.,
Skinner Kelly,
Gilbert Jack A.,
Desai Narayan,
Glass Elizabeth M.,
Paczian Tobias,
Wilke Andreas,
Antonopoulos Dionysios,
Kemner Kenneth M.,
Meyer Folker
Publication year - 2014
Publication title -
environmental microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.954
H-Index - 188
eISSN - 1462-2920
pISSN - 1462-2912
DOI - 10.1111/1462-2920.12453
Subject(s) - biology , genome , metagenomics , sulfur metabolism , sulfur , bacteria , gene , genetics , whole genome sequencing , chemistry , organic chemistry
Summary We reconstructed the complete 2.4 Mb‐long genome of a previously uncultivated epsilonproteobacterium, C andidatus Sulfuricurvum sp. RIFRC ‐1, via assembly of short‐read shotgun metagenomic data using a complexity reduction approach. Genome‐based comparisons indicate the bacterium is a novel species within the S ulfuricurvum genus, which contains one cultivated representative, S . kujiense . Divergence between the species appears due in part to extensive genomic rearrangements, gene loss and chromosomal versus plasmid encoding of certain (respiratory) genes by RIFRC ‐1. Deoxyribonucleic acid for the genome was obtained from terrestrial aquifer sediment, in which RIFRC ‐1 comprised ∼ 47% of the bacterial community. Genomic evidence suggests RIFRC ‐1 is a chemolithoautotrophic diazotroph capable of deriving energy for growth by microaerobic or nitrate‐/nitric oxide‐dependent oxidation of S 0 , sulfide or sulfite or H 2 oxidation. Carbon may be fixed via the reductive tricarboxylic acid cycle. Consistent with these physiological attributes, the local aquifer was microoxic with small concentrations of available nitrate, small but elevated concentrations of reduced sulfur and NH 4 + / NH 3 ‐limited. Additionally, various mechanisms for heavy metal and metalloid tolerance and virulence point to a lifestyle well‐adapted for metal(loid)‐rich environments and a shared evolutionary past with pathogenic E psilonproteobacteria . Results expand upon recent findings highlighting the potential importance of sulfur and hydrogen metabolism in the terrestrial subsurface.