Guillaume Borrel

TL;DR: The archaeal tree is being rapidly filled up with new branches constituting phyla, classes and orders, generating novel challenges for high-rank systematics, and providing key information for dissecting the origin of this domain, the evolutionary trajectories that have shaped its current diversity, and its relationships with Bacteria and Eukarya.

TL;DR: An updated census of the archaeal diversity associated with the human GIT and their possible role in the gut physiology and health is provided and particularly focuses on the still poorly characterized 7th order of methanogens, the Methanomassiliicoccales associated to aged population.

TL;DR: The effects of environmental factors on methanogenic and methanotrophic rates are reviewed and an inventory of the methanogens and meethanotrophs at the genus/species level in freshwater lakes is given, focusing on the anaerobic oxidation of methane.

TL;DR: This study represents the first insights into the genomic organization and metabolic traits of the seventh order of methanogens and suggests a different handling of the Pyl-encoding capacity among the three analyzed Methanomassiliicoccales representatives.

TL;DR: Phylogenetic analysis including homologs retrieved from environmental samples indicates that methylotrophic methanogenesis (regardless of dependency on H2) is not restricted to gut representatives but may be an ancestral characteristic of the whole order, and possibly also of ancient origin in the Euryarchaeota.