Nitrogen Fixation at 92°C by a Hydrothermal Vent Archaeon

  title={Nitrogen Fixation at 92°C by a Hydrothermal Vent Archaeon},
  author={Mausmi P. Mehta and J. Baross},
  pages={1783 - 1786}
  • Mausmi P. Mehta, J. Baross
  • Published 2006
  • Biology
  • Science
  • A methanogenic archaeon isolated from deep-sea hydrothermal vent fluid was found to reduce N2 to NH3 at up to 92°C, which is 28°C higher than the current upper temperature limit of biological nitrogen fixation. The 16S ribosomal RNA gene of the hyperthermophilic nitrogen fixer, designated FS406-22, was 99% similar to that of non–nitrogen fixing Methanocaldococcus jannaschii DSM 2661. At its optimal growth temperature of 90°C, FS406-22 incorporated 15N2 and expressed nifH messenger RNA. This… CONTINUE READING
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