Diversification in ANME-1 archaea is associated with the presence of highly variable genomic hotspots

2026/05/25 by Yingli Zhou, Jing-Chun Feng, Rui Lu +11 · 1 voice
Environmental Science · #Bacteriophages and microbial interactions #Methane Hydrates and Related Phenomena #Microbial Community Ecology and Physiology

paper · pdf · doi:10.1038/s41467-026-73573-4

openalex publication_date 2026/05/25 · openalex created_date 2026/05/26 · openalex updated_date 2026/07/31

Abstract

Anaerobic methanotrophic (ANME) archaea have been primarily documented by metagenomic analysis of environmental samples. The mechanisms that drive their diversification and speciation are poorly understood. Here we analyse the phylogenomic diversity at the species and strain levels of clade ANME-1 from deep-sea cold seeps, as a model system with a well-studied phylogenetic framework. We reconstruct high-quality circular metagenomic-assembled genomes (cMAGs) and identify highly variable genomic hotspots that distinguish them. Genomic differentiation and diversification in ANME-1 is associated with genes involved in prokaryotic defense systems, transport mechanisms and methane metabolism. In addition, heterologous expression of ANME-1 hicAB operons supports their proposed role as toxin/antitoxin systems, possibly involved in mediating responses to environmental stresses. Anaerobic methanotrophic (ANME) archaea are abundant in marine cold seeps. Here, the authors reconstruct high-quality circular metagenomic-assembled genomes and identify variable genomic hotspots associated with phylogenomic diversity at the species and strain levels.

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Discussions

• Diversification in ANME-1 archaea is associated with the presence of highly variable genomic hotspots #microbiology #archaea #methane #MicroSky #ArchaeaSky @natcomms.nature.com doi.org/10.1038/s414.. [bsky, 4 points, 0 comments]

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