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Showing 1–14 of 14 results
Advanced filters: Author: Boran Kartal Clear advanced filters

  • Planctomycetes are unusual bacteria with complex intracellular compartments and an apparent lack of peptidoglycan in their cell walls. Here, van Teeseling et al. show that the cell wall of an anammox planctomycete does contain peptidoglycan, and propose to redefine planctomycetes as Gram-negative bacteria.

    • Muriel C.F. van Teeseling
    • Rob J. Mesman
    • Laura van Niftrik
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-6

  • A symbiosis between a diatom and a newly discovered species of alphaproteobacteria, ‘Candidatus Tectiglobus diatomicola’, can fix nitrogen in the ocean, providing evidence that nitrogen fixers other than cyanobacteria have a key role in the marine environment.

    • Bernhard Tschitschko
    • Mertcan Esti
    • Marcel M. M. Kuypers
    ResearchOpen Access
    Nature
    Volume: 630, P: 899-904

  • Anammox bacteria couple nitrite reduction to ammonium oxidation, with nitric oxide (NO) and hydrazine as intermediates, and produce N2 and nitrate. Here, Hu et al. show that an anammox bacterium can grow in the absence of nitrite by coupling ammonium oxidation to NO reduction, producing only N2.

    • Ziye Hu
    • Hans J. C. T. Wessels
    • Boran Kartal
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • Nitrogen-transforming microorganisms shape global biogeochemical nutrient cycles. In this Review, Kuypers, Marchant and Kartal explore the vast diversity of these microorganisms and their enzymes, highlighting novel pathways, and discuss how nitrogen-transforming microorganisms form complex nitrogen-cycling networks in different environments.

    • Marcel M. M. Kuypers
    • Hannah K. Marchant
    • Boran Kartal
    Reviews
    Nature Reviews Microbiology
    Volume: 16, P: 263-276

  • The oxidoreductase (NXR) multiprotein complex is a key enzyme in the nitrogen cycle. A detailed structural and biochemical characterization of NXR from the anammox bacterium Kuenenia stuttgartiensis shows that this complex is a filament-forming protein that catalysers both nitrite oxidation and nitrate reduction, and elucidates the mechanisms governing complex assembly and function.

    • Tadeo Moreno Chicano
    • Lea Dietrich
    • Thomas R. M. Barends
    ResearchOpen Access
    Nature Microbiology
    Volume: 6, P: 1129-1139

  • Hydrazine is an intermediate in the process of anaerobic ammonium oxidation which has a major role in the Earth’s nitrogen cycle; the crystal structure of a hydrazine synthase enzyme provides insights into the mechanism of hydrazine synthesis.

    • Andreas Dietl
    • Christina Ferousi
    • Thomas R. M. Barends
    Research
    Nature
    Volume: 527, P: 394-397

  • Until now, the oxidation steps necessary for complete nitrification had always been observed to occur in two separate microorganisms in a cross-feeding interaction; here, together with the study by Daims et al., van Kessel et al. report the enrichment and characterization of Nitrospira species that encode all of the enzymes necessary to catalyse complete nitrification, a phenotype referred to as ‘comammox’ (for complete ammonia oxidation).

    • Maartje A. H. J. van Kessel
    • Daan R. Speth
    • Sebastian Lücker
    Research
    Nature
    Volume: 528, P: 555-559