Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia

  title={Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia},
  author={Xinning Zhang and D. Sigman and François M. M. Morel and A. M. Kraepiel},
  journal={Proceedings of the National Academy of Sciences},
  pages={4782 - 4787}
  • Xinning Zhang, D. Sigman, +1 author A. M. Kraepiel
  • Published 2014
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences
  • Significance Biological nitrogen fixation is the main route by which nitrogen enters the biosphere. This reaction is catalyzed by nitrogenase, a metalloenzyme that exists in forms containing molybdenum, vanadium, or iron only. The contribution of the “alternative” vanadium and iron-only nitrogenases to nitrogen fixation in the present and the past is unknown. Here we show that the nitrogen isotopic composition (15N to 14N ratio) of biomass generated from nitrogen fixation by alternative… CONTINUE READING
    94 Citations
    Effect of iron limitation on the isotopic composition of cellular and released fixed nitrogen in Azotobacter vinelandii
    • 3
    • PDF
    Biological nitrogen fixation by alternative nitrogenases in terrestrial ecosystems: a review
    • 4
    • Highly Influenced
    Exploring the alternatives of biological nitrogen fixation.
    • 35
    Nitrogen fixation sustained productivity in the wake of the Palaeoproterozoic Great Oxygenation Event
    • 15
    • PDF


    Nitrogen isotope effects induced by anammox bacteria
    • 96
    • PDF
    An Alternative Path for the Evolution of Biological Nitrogen Fixation
    • 65
    • PDF
    New insights into the evolutionary history of biological nitrogen fixation
    • 101
    • PDF
    The cycling and redox state of nitrogen in the Archaean ocean
    • 170
    • PDF
    A late methanogen origin for molybdenum-dependent nitrogenase.
    • 85
    • PDF
    A global marine‐fixed nitrogen isotopic budget: Implications for Holocene nitrogen cycling
    • 390
    • Highly Influential
    Isotopic Evidence for an Aerobic Nitrogen Cycle in the Latest Archean
    • 123
    • PDF