
ISME Communications, Journal Year: 2024, Volume and Issue: 4(1)
Published: Jan. 1, 2024
Abstract The archaeal class Bathyarchaeia is widely and abundantly distributed in anoxic habitats. Metagenomic studies have suggested that they are mixotrophic, capable of CO2 fixation heterotrophic growth, involved acetogenesis lignin degradation. We analyzed 35 metagenome-assembled genomes (MAGs), including the first complete circularized MAG (cMAG) Bathy-6 subgroup, from metagenomes three full-scale pulp paper mill anaerobic digesters laboratory methanogenic enrichment cultures maintained on pre-treated poplar. Thirty-three MAGs belong to Bathy-6, lineage while two Bathy-8 lineage. In our previous analysis microbial community digesters, were abundant positively correlated hydrogenotrophic methylotrophic methanogenesis. Several factors likely contribute success compared reactors. larger than those more genes lignocellulose degradation, carbohydrate-active enzymes not present Bathy-8. also shares Bathyarchaeal O-demethylase system recently identified All had numerous membrane-associated pyrroloquinoline quinone-domain proteins we suggest modification or together with Radical-S-adenosylmethionine (SAM) Rieske domain proteins, AA2, AA3, AA6-family oxidoreductases. a B12 synthesis pathway nitrogenase gene locus. Finally, comparative genomic analyses revealed dynamic interacted other organisms their environments through transfer expand repertoire.
Language: Английский