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Biogenesis of DNA-carrying extracellular vesicles by the dominant human gut methanogenic archaeon

Author

Listed:
  • Diana P. Baquero

    (Archaeal Virology Unit)

  • Guillaume Borrel

    (Evolutionary Biology of the Microbial Cell)

  • Anastasia Gazi

    (Université Paris Cité)

  • Camille Martin-Gallausiaux

    (Evolutionary Biology of the Microbial Cell)

  • Virginija Cvirkaite-Krupovic

    (Archaeal Virology Unit)

  • Pierre-Henri Commere

    (Flow Cytometry Platform)

  • Nika Pende

    (Evolutionary Biology of the Microbial Cell
    Archaea Physiology and Biotechnology Group)

  • Stéphane Tachon

    (Centre de Ressources et Recherches Technologiques (C2RT))

  • Anna Sartori-Rupp

    (Centre de Ressources et Recherches Technologiques (C2RT))

  • Thibaut Douché

    (Mass Spectrometry for Biology)

  • Mariette Matondo

    (Mass Spectrometry for Biology)

  • Simonetta Gribaldo

    (Evolutionary Biology of the Microbial Cell)

  • Mart Krupovic

    (Archaeal Virology Unit)

Abstract

Extracellular vesicles (EVs) play many important roles in cells from all domains of life. Here, we characterize EVs produced by Methanobrevibacter smithii, the dominant methanogenic archaeon in the human gut, which contains a peptidoglycan cell wall. We show that M. smithii EVs are enriched in histones and diverse DNA repair proteins. Consistently, the EVs carry DNA and are strongly enriched in extrachromosomal circular DNA (eccDNA) molecules, which originate from excision of a 2.9-kb chromosomal fragment, and a proviral genome. The eccDNA encodes enzymes implicated in biosynthesis of cofactor F420 and coenzyme M, two elements critical for methanogenesis. Furthermore, several of the most abundant EV proteins are implicated in methanogenesis. Cryo-electron tomography suggests that EVs are formed by budding from the cell membrane and are trapped under the peptidoglycan layer prior to liberation through disruptions in the cell wall. Our results reveal parallels with EV biogenesis in bacteria and suggest that M. smithii EVs have potential impact on methane production in the gut.

Suggested Citation

  • Diana P. Baquero & Guillaume Borrel & Anastasia Gazi & Camille Martin-Gallausiaux & Virginija Cvirkaite-Krupovic & Pierre-Henri Commere & Nika Pende & Stéphane Tachon & Anna Sartori-Rupp & Thibaut Dou, 2025. "Biogenesis of DNA-carrying extracellular vesicles by the dominant human gut methanogenic archaeon," Nature Communications, Nature, vol. 16(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60272-9
    DOI: 10.1038/s41467-025-60272-9
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    References listed on IDEAS

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    1. Panpan Zhang & Assane Mbodj & Abirami Soundiramourtty & Christel Llauro & Alain Ghesquière & Mathieu Ingouff & R. Keith Slotkin & Frédéric Pontvianne & Marco Catoni & Marie Mirouze, 2023. "Extrachromosomal circular DNA and structural variants highlight genome instability in Arabidopsis epigenetic mutants," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
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