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Asgard archaea modulate potential methanogenesis substrates in wetland soil

Author

Listed:
  • Luis E. Valentin-Alvarado

    (University of California
    University of California)

  • Kathryn E. Appler

    (University of Texas at Austin; Marine Science Institute)

  • Valerie Anda

    (University of Texas at Austin; Marine Science Institute
    University of Texas at Austin)

  • Marie C. Schoelmerich

    (University of California
    Department of Environmental Systems Sciences; ETH Zürich)

  • Jacob West-Roberts

    (University of California)

  • Veronika Kivenson

    (University of California)

  • Alexander Crits-Christoph

    (University of California
    University of California
    Cultivarium)

  • Lynn Ly

    (Oxford Nanopore Technologies Inc)

  • Rohan Sachdeva

    (University of California)

  • Chris Greening

    (Biomedicine Discovery Institute; Monash University
    Monash University)

  • David F. Savage

    (University of California
    University of California
    University of California Berkeley)

  • Brett J. Baker

    (University of Texas at Austin; Marine Science Institute
    University of Texas at Austin)

  • Jillian F. Banfield

    (University of California
    University of California
    Biomedicine Discovery Institute; Monash University
    University of California)

Abstract

The roles of Asgard archaea in eukaryogenesis and marine biogeochemical cycles are well studied, yet their contributions in soil ecosystems remain unknown. Of particular interest are Asgard archaeal contributions to methane cycling in wetland soils. To investigate this, we reconstructed two complete genomes for soil-associated Atabeyarchaeia, a new Asgard lineage, and a complete genome of Freyarchaeia, and predicted their metabolism in situ. Metatranscriptomics reveals expression of genes for [NiFe]-hydrogenases, pyruvate oxidation and carbon fixation via the Wood-Ljungdahl pathway. Also expressed are genes encoding enzymes for amino acid metabolism, anaerobic aldehyde oxidation, hydrogen peroxide detoxification and carbohydrate breakdown to acetate and formate. Overall, soil-associated Asgard archaea are predicted to include non-methanogenic acetogens, highlighting their potential role in carbon cycling in terrestrial environments.

Suggested Citation

  • Luis E. Valentin-Alvarado & Kathryn E. Appler & Valerie Anda & Marie C. Schoelmerich & Jacob West-Roberts & Veronika Kivenson & Alexander Crits-Christoph & Lynn Ly & Rohan Sachdeva & Chris Greening & , 2024. "Asgard archaea modulate potential methanogenesis substrates in wetland soil," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49872-z
    DOI: 10.1038/s41467-024-49872-z
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