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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.
daime, a novel image analysis program for microbial ecology and biofilm research.
Combinations of microscopy and molecular techniques to detect, identify and characterize microorganisms in environmental and medical samples are widely used in microbial ecology and biofilm research.
Complete nitrification by a single microorganism
TLDR
The enrichment and initial characterization of two Nitrospira species that encode all the enzymes necessary for ammonia oxidation via nitrite to nitrate in their genomes, and indeed completely oxidize ammonium to nitrates to conserve energy are reported.
Deep sequencing reveals exceptional diversity and modes of transmission for bacterial sponge symbionts
TLDR
Bacterial diversity that is unparalleled in an invertebrate host is shown, with more than 250 000 sponge-derived sequence tags being assigned to 23 bacterial phyla and revealing up to 2996 operational taxonomic units per sponge species.
Lateral Gene Transfer of Dissimilatory (Bi)Sulfite Reductase Revisited
TLDR
It is demonstrated that the dissimilatory (bi)sulfite reductase genes (dsrAB) of Desulfobacula toluolica were vertically inherited.
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.
16S rRNA Gene-Based Oligonucleotide Microarray for Environmental Monitoring of the Betaproteobacterial Order “Rhodocyclales”
TLDR
The implementation of a newly designed “Rhodocyclales”-selective PCR amplification system prior to microarray hybridization greatly enhanced the sensitivity of the RHC-PhyloChip and thus enabled the detection of “Tournaisia” populations with relative abundances of less than 1% of all bacteria (as determined by fluorescence in situ hybridization) in the activated sludge.
Nitrification expanded: discovery, physiology and genomics of a nitrite-oxidizing bacterium from the phylum Chloroflexi
TLDR
The surprising discovery of a chemolithoautotrophic nitrite oxidizer that belongs to the widespread phylum Chloroflexi not previously known to contain any nitrifying organism significantly extends the known diversity of nitrify organisms and likely will have implications for future research on nitrification in natural and engineered ecosystems.
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