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Genomic and enzymatic evidence of acetogenesis by anaerobic methanotrophic archaea

Author

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  • Shanshan Yang

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Yongxin Lv

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Xipeng Liu

    (Shanghai Jiao Tong University)

  • Yinzhao Wang

    (Shanghai Jiao Tong University)

  • Qilian Fan

    (Shanghai Jiao Tong University)

  • Zhifeng Yang

    (Shanghai Jiao Tong University)

  • Nico Boon

    (Ghent University)

  • Fengping Wang

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Xiang Xiao

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University
    Pilot National Laboratory for Marine Science and Technology)

  • Yu Zhang

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

Abstract

Anaerobic oxidation of methane (AOM) mediated by anaerobic methanotrophic archaea (ANME) is the primary process that provides energy to cold seep ecosystems by converting methane into inorganic carbon. Notably, cold seep ecosystems are dominated by highly divergent heterotrophic microorganisms. The role of the AOM process in supporting heterotrophic population remains unknown. We investigate the acetogenic capacity of ANME-2a in a simulated cold seep ecosystem using high-pressure biotechnology, where both AOM activity and acetate production are detected. The production of acetate from methane is confirmed by isotope-labeling experiments. A complete archaeal acetogenesis pathway is identified in the ANME-2a genome, and apparent acetogenic activity of the key enzymes ADP-forming acetate-CoA ligase and acetyl-CoA synthetase is demonstrated. Here, we propose a modified model of carbon cycling in cold seeps: during AOM process, methane can be converted into organic carbon, such as acetate, which further fuels the heterotrophic community in the ecosystem.

Suggested Citation

  • Shanshan Yang & Yongxin Lv & Xipeng Liu & Yinzhao Wang & Qilian Fan & Zhifeng Yang & Nico Boon & Fengping Wang & Xiang Xiao & Yu Zhang, 2020. "Genomic and enzymatic evidence of acetogenesis by anaerobic methanotrophic archaea," Nature Communications, Nature, vol. 11(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17860-8
    DOI: 10.1038/s41467-020-17860-8
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    Cited by:

    1. Liang, Jianzhen & Feng, Jing-Chun & Chen, Xiao & Li, Cun & Zhang, Si, 2024. "Increasing temperature and sulfate enhances the efficiency of methane abatement in an anaerobic oxidation of methane bioreactor (AOMB) system," Applied Energy, Elsevier, vol. 362(C).
    2. Mengfan Chu & Rui Bao & Michael Strasser & Ken Ikehara & Jez Everest & Lena Maeda & Katharina Hochmuth & Li Xu & Ann McNichol & Piero Bellanova & Troy Rasbury & Martin Kölling & Natascha Riedinger & J, 2023. "Earthquake-enhanced dissolved carbon cycles in ultra-deep ocean sediments," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Yunru Chen & Liang Dong & Weikang Sui & Mingyang Niu & Xingqian Cui & Kai-Uwe Hinrichs & Fengping Wang, 2024. "Cycling and persistence of iron-bound organic carbon in subseafloor sediments," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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