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Metabolic diversity within the globally abundant Marine Group II Euryarchaea offers insight into ecological patterns

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  • Benjamin J. Tully

    (University of Southern California
    University of Southern California)

Abstract

Despite their discovery over 25 years ago, the Marine Group II Euryarchaea (MGII) remain a difficult group of organisms to study, lacking cultured isolates and genome references. The MGII have been identified in marine samples from around the world, and evidence supports a photoheterotrophic lifestyle combining phototrophy via proteorhodopsins with the remineralization of high molecular weight organic matter. Divided between two clades, the MGII have distinct ecological patterns that are not understood based on the limited number of available genomes. Here, I present a comparative genomic analysis of 250 MGII genomes, providing a comprehensive investigation of these mesophilic archaea. This analysis identifies 17 distinct subclades including nine subclades that previously lacked reference genomes. The metabolic potential and distribution of the MGII genera reveals distinct roles in the environment, identifying algal-saccharide-degrading coastal subclades, protein-degrading oligotrophic surface ocean subclades, and mesopelagic subclades lacking proteorhodopsins, common in all other subclades.

Suggested Citation

  • Benjamin J. Tully, 2019. "Metabolic diversity within the globally abundant Marine Group II Euryarchaea offers insight into ecological patterns," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-018-07840-4
    DOI: 10.1038/s41467-018-07840-4
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    Cited by:

    1. Paul O. Sheridan & Yiyu Meng & Tom A. Williams & Cécile Gubry-Rangin, 2023. "Genomics of soil depth niche partitioning in the Thaumarchaeota family Gagatemarchaeaceae," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    2. Paul O. Sheridan & Yiyu Meng & Tom A. Williams & Cécile Gubry-Rangin, 2022. "Recovery of Lutacidiplasmatales archaeal order genomes suggests convergent evolution in Thermoplasmatota," Nature Communications, Nature, vol. 13(1), pages 1-13, December.

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