Evidence map›Paper›PMID 26305944›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2015

Expanded metabolic versatility of ubiquitous nitrite-oxidizing bacteria from the genus Nitrospira.

Hanna Koch, Sebastian Lücker, Mads Albertsen, Katharina Kitzinger, Craig Herbold, Eva Spieck, Per Halkjaer Nielsen, Michael Wagner, Holger Daims

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 182 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
182citing papers in PubMed, 1 pooled it
20.7field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

182 citing papers in PubMed, 1 synthesis or guideline pooled it, 542 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Comparative physiological and genomic characterization of a novelApplied and environmental microbiology · 2026
    Article
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  16. Unusual Plastoquinones in Non-Phototrophic Nitrifying Bacteria.Environmental microbiology reports · 2025
    Article
  17. Article
  18. Nitrate-Nitrite Interplay in the Nitrogen Biocycle.Molecules (Basel, Switzerland) · 2025
    Review
  19. Article
  20. Article

122 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 3 countries.

Hanna KochDepartment of Microbiology and Ecosystem Science, Division of Microbial Ecology, Research Network Chemistry meets Microbiology, University of Vienna, 1090 Vienna, Austria;
Sebastian LückerDepartment of Microbiology and Ecosystem Science, Division of Microbial Ecology, Research Network Chemistry meets Microbiology, University of Vienna, 1090 Vienna, Austria;
Mads AlbertsenCenter for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg, Denmark;
Katharina KitzingerDepartment of Microbiology and Ecosystem Science, Division of Microbial Ecology, Research Network Chemistry meets Microbiology, University of Vienna, 1090 Vienna, Austria;
Craig HerboldDepartment of Microbiology and Ecosystem Science, Division of Microbial Ecology, Research Network Chemistry meets Microbiology, University of Vienna, 1090 Vienna, Austria;
Eva SpieckBiozentrum Klein Flottbek, Microbiology and Biotechnology, University of Hamburg, 22609 Hamburg, Germany.
Per Halkjaer NielsenCenter for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg, Denmark;
Michael WagnerDepartment of Microbiology and Ecosystem Science, Division of Microbial Ecology, Research Network Chemistry meets Microbiology, University of Vienna, 1090 Vienna, Austria;
Holger DaimsDepartment of Microbiology and Ecosystem Science, Division of Microbial Ecology, Research Network Chemistry meets Microbiology, University of Vienna, 1090 Vienna, Austria; daims@microbial-ecology.net.
University of Vienna · ATAalborg University · DKUniversität Hamburg · DE

Funding

Training Grant in Genomic Analysis and InterpretationT32HG002536 · NHGRI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI Valerie A Arboleda, Harold Pimentel · 2002 to 2026
$8.6M
European Research Council 294343NHGRI NIH HHS T32 HG002536
6 · The paper itself

Abstract

Nitrospira are a diverse group of nitrite-oxidizing bacteria and among the environmentally most widespread nitrifiers. However, they remain scarcely studied and mostly uncultured. Based on genomic and experimental data from Nitrospira moscoviensis representing the ubiquitous Nitrospira lineage II, we identified ecophysiological traits that contribute to the ecological success of Nitrospira. Unexpectedly, N. moscoviensis possesses genes coding for a urease and cleaves urea to ammonia and CO2. Ureolysis was not observed yet in nitrite oxidizers and enables N. moscoviensis to supply ammonia oxidizers lacking urease with ammonia from urea, which is fully nitrified by this consortium through reciprocal feeding. The presence of highly similar urease genes in Nitrospira lenta from activated sludge, in metagenomes from soils and freshwater habitats, and of other ureases in marine nitrite oxidizers, suggests a wide distribution of this extended interaction between ammonia and nitrite oxidizers, which enables nitrite-oxidizing bacteria to indirectly use urea as a source of energy. A soluble formate dehydrogenase lends additional ecophysiological flexibility and allows N. moscoviensis to use formate, with or without concomitant nitrite oxidation, using oxygen, nitrate, or both compounds as terminal electron acceptors. Compared with Nitrospira defluvii from lineage I, N. moscoviensis shares the Nitrospira core metabolism but shows substantial genomic dissimilarity including genes for adaptations to elevated oxygen concentrations. Reciprocal feeding and metabolic versatility, including the participation in different nitrogen cycling processes, likely are key factors for the niche partitioning, the ubiquity, and the high diversity of Nitrospira in natural and engineered ecosystems.

Indexed as

AmmoniaBacteriaBacterial ProteinsEcosystemFormate DehydrogenasesFormatesFresh WaterGenome, BacterialMetagenomeMolecular Sequence DataNitratesNitritesNitrogen CycleOxidation-ReductionOxygenSequence Analysis, DNAAmmoniaBacterial ProteinsFormate DehydrogenasesFormatesNitratesNitritesOxygenSewageUreaUreaseformategenomenitrificationNitrospiraurease

Identifiers

PMID26305944
PMCPMC4568715
OpenAlexW2155704095

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.