• Publications
  • Influence
A moderately thermophilic ammonia-oxidizing crenarchaeote from a hot spring
TLDR
The enriched AOA, which is provisionally classified as “Candidatus Nitrososphaera gargensis,” is the first described thermophilic ammonia oxidizer and the first member of the crenarchaeotal group I.1b for which ammonium oxidation has been verified on a cellular level.
Distinct gene set in two different lineages of ammonia-oxidizing archaea supports the phylum Thaumarchaeota.
TLDR
Phylogenetic studies based on r-proteins and other core genes, as well as comparative genomics, confirm the assignment of archaea comprising ammonia oxidizers of moderate terrestrial and marine environments to a separate phylum and reveal a Thaumarchaeota-specific set of core informational processing genes.
A Nitrospira metagenome illuminates the physiology and evolution of globally important nitrite-oxidizing bacteria
TLDR
Comparison genomic analyses indicate functionally significant lateral gene-transfer events between the genus Nitrospira and anaerobic ammonium-oxidizing planctomycetes, which share highly similar forms of NXR and other proteins reflecting that two key processes of the nitrogen cycle are evolutionarily connected.
NxrB encoding the beta subunit of nitrite oxidoreductase as functional and phylogenetic marker for nitrite-oxidizing Nitrospira.
TLDR
This work introduces nxrB, the gene encoding subunit beta of nitrite oxidoreductase, as a functional and phylogenetic marker for Nitrospira, and reveals a previously unrecognized diversity of terrestrial NitroSpira.
The Genome of Nitrospina gracilis Illuminates the Metabolism and Evolution of the Major Marine Nitrite Oxidizer
TLDR
Comparative genomics indicated a strong evolutionary link between Nitrospina, the nitrite-oxidizing genus Nitro Spina, and anaerobic ammonium oxidizers, apparently including the horizontal transfer of a periplasmically oriented nitrite oxidoreductase and other key genes for nitrite oxidation at an early evolutionary stage.
Cultivation of a novel cold-adapted nitrite oxidizing betaproteobacterium from the Siberian Arctic
TLDR
It is demonstrated that a novel genus of chemolithoautotrophic nitrite oxidizing bacteria is present in polygonal tundra soils and can be enriched at low temperatures up to 17°C and proposed provisional classification of the novel nitrite oxidation bacterium as ‘Candidatus Nitrotoga arctica’.
Crenarchaeol dominates the membrane lipids of Candidatus Nitrososphaera gargensis, a thermophilic Group I.1b Archaeon
TLDR
The hypothesis that crenarchaeol is specific to all AOA is supported and specific lipids, which may prove useful as biomarkers for ‘Ca. N. gargensis’-like AOA are highlighted.
Comparison of Oxidation Kinetics of Nitrite-Oxidizing Bacteria: Nitrite Availability as a Key Factor in Niche Differentiation
TLDR
The kinetic parameters determined represent improved basis values for nitrifying models and will support predictions of community structure and nitrification rates in natural and engineered ecosystems.
Expanded metabolic versatility of ubiquitous nitrite-oxidizing bacteria from the genus Nitrospira
TLDR
It is reported that, surprisingly, key NOB of many ecosystems (Nitrospira) convert urea, an important ammonia source in nature, to ammonia and CO2, leading to a reciprocal feeding interaction of nitrifiers.
The genome of the ammonia-oxidizing Candidatus Nitrososphaera gargensis: insights into metabolic versatility and environmental adaptations.
TLDR
The complete genome sequence of Candidatus Nitrososphaera gargensis is obtained from an enrichment culture, representing a different evolutionary lineage of AOA frequently found in high numbers in many terrestrial environments and it is shown that thaumarchaeota produce cofactor F420 as well as polyhydroxyalkanoates.
...
1
2
3
4
5
...