A hydrogen-dependent geochemical analogue of primordial carbon and energy metabolism

@article{Preiner2020AHG,
  title={A hydrogen-dependent geochemical analogue of primordial carbon and energy metabolism},
  author={Martina Preiner and Kensuke Igarashi and Kamila B. Muchowska and Mingquan Yu and Sreejith J. Varma and Karl Kleinermanns and Masaru Konishi Nobu and Yoichi Kamagata and Harun T{\"u}ys{\"u}z and Joseph Moran and William F. Martin},
  journal={Nature Ecology \& Evolution},
  year={2020},
  volume={4},
  pages={534-542}
}
Hydrogen gas, H 2 , is generated by alkaline hydrothermal vents through an ancient geochemical process called serpentinization, in which water reacts with iron-containing minerals deep within the Earth’s crust. H 2 is the electron donor for the most ancient and the only energy-releasing route of biological CO 2 fixation, the acetyl-CoA pathway. At the origin of metabolism, CO 2 fixation by hydrothermal H 2 within serpentinizing systems could have preceded and patterned biotic pathways. Here we… Expand
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  • Frontiers in Microbiology
  • 2020
TLDR
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TLDR
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Spontaneous assembly of redox-active iron-sulfur clusters at low concentrations of cysteine
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Electrochemically induced metal- vs. ligand-based redox changes in mackinawite: identification of a Fe3+- and polysulfide-containing intermediate.
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Investigation of the chemical properties of iron-sulfide by cyclic voltammetry, Raman and X-ray absorption spectroscopic techniques point to the existence of a metastable FeS phase located at the junction of a metal-based oxidation path between FeS and greigite and a ligand-based oxidative path betweenFeS and pyrite. Expand
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