A novel hydrogen oxidizer amidst the sulfur-oxidizing Thiomicrospira lineage

Thiomicrospira species are ubiquitously found in various marine environments and appear particularly common in hydrothermal vent systems. Members of this lineage are commonly classified as sulfur-oxidizing chemolithoautotrophs. Although sequencing of Thiomicrospira crunogena ’s genome has revealed g...

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Bibliographic Details
Published in:The ISME Journal 2015-03, Vol.9 (3), p.696-707
Main Authors: Hansen, Moritz, Perner, Mirjam
Format: Article
Language:English
Subjects:
14/32
631/326/41/2535
Biomedical and Life Sciences
Deep sea
Ecology
Evolutionary Biology
Hydrogen
Hydrogen - metabolism
Hydrogenase - metabolism
Hydrothermal Vents - microbiology
Life Sciences
Marine environment
Microbial Ecology
Microbial Genetics and Genomics
Microbiology
Original
original-article
Oxidation-Reduction
Phylogeny
Piscirickettsiaceae - classification
Piscirickettsiaceae - growth & development
Piscirickettsiaceae - isolation & purification
Piscirickettsiaceae - metabolism
Seawater - microbiology
Sulfur
Sulfur - metabolism
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Summary:Thiomicrospira species are ubiquitously found in various marine environments and appear particularly common in hydrothermal vent systems. Members of this lineage are commonly classified as sulfur-oxidizing chemolithoautotrophs. Although sequencing of Thiomicrospira crunogena ’s genome has revealed genes that encode enzymes for hydrogen uptake activity and for hydrogenase maturation and assembly, hydrogen uptake ability has so far not been reported for any Thiomicrospira species. We isolated a Thiomicrospira species (SP-41) from a deep sea hydrothermal vent and demonstrated that it can oxidize hydrogen. We show in vivo hydrogen consumption, hydrogen uptake activity in partially purified protein extracts and transcript abundance of hydrogenases during different growth stages. The ability of this strain to oxidize hydrogen opens up new perspectives with respect to the physiology of Thiomicrospira species that have been detected in hydrothermal vents and that have so far been exclusively associated with sulfur oxidation.
ISSN:1751-7362
1751-7370
DOI:10.1038/ismej.2014.173