Globally distributed marine Gemmatimonadota have unique genomic potentials

Area of Science:

• Microbiology
• Genomics
• Marine Science

Background:

• Gemmatimonadota bacteria are globally distributed but their marine roles and metabolism remain unclear.
• Limited understanding of Gemmatimonadota metabolic potential and ecological functions in marine ecosystems.

Purpose of the Study:

• To characterize the genomic diversity and metabolic potential of Gemmatimonadota in marine environments.
• To investigate the phylogenetic distinctions between marine and terrestrial Gemmatimonadota.

Main Methods:

• Analysis of 495 metagenome-assembled genomes (MAGs) and associated viruses from global marine sediments.
• Phylogenetic analysis and comparative genomics to assess protein composition and genetic potential.

Main Results:

• Marine Gemmatimonadota are phylogenetically distinct from terrestrial counterparts.
• Identified metabolic capabilities including complex organic carbon degradation, denitrification, sulfate reduction, and sulfide/sulfite oxidation.
• Revealed widespread potential for secondary metabolite biosynthesis and viral manipulation of host metabolism.

Conclusions:

• Expanded genomic data advances understanding of marine Gemmatimonadota diversity and ecological roles.
• Highlights genetic differences between terrestrial and marine Gemmatimonadota communities.
• Suggests Gemmatimonadota as a source of novel natural products and reveals viral-host interactions.