A novel hydrogen oxidizer amidst the sulfur-oxidizing Thiomicrospira lineage.

Hansen, Moritz and Perner, Mirjam (2015) A novel hydrogen oxidizer amidst the sulfur-oxidizing Thiomicrospira lineage. The ISME Journal, 9 (3). pp. 696-707. DOI 10.1038/ismej.2014.173.

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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.

Document Type: Article
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1038/ismej.2014.173
ISSN: 1751-7362
Date Deposited: 17 Jan 2019 10:01
Last Modified: 17 Jan 2019 10:01
URI: http://oceanrep.geomar.de/id/eprint/45414

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