Excited to share our discovery of archaeal circular, jumbo extrachromosomal elements (up to ~535 kb genomes). One related, 409-kb genome is integrated in CH4-eating Methanoperedens, representing the largest integrative element in Archaea so far! Curious about what they are doing? See the paper
Ling-Dong Shi
Jumbo circular extrachromosomal elements of methane-oxidizing archaea with variably extensive metabolic and defense gene repertoires https://www.biorxiv.org/content/10.64898/2026.01.21.700959v1
