Archaea

The closed chromosome of an Asgard archaeon, Candidatus Odinarchaeum yellowstonii LCB_4, revealed CRISPR spacers, which were used to identify archaeal viruses.

Analysis of CRISPR spacers in Asgardarchaeota metagenomes reveals three family-level groups of viruses associated with these microbial eukaryotes.

The ESCRT pathway is crucial for membrane remodelling in eukaryotes. Here, Hatano et al. explore the phylogeny, structure, and biochemistry of homologues of the ESCRT machinery and the associated ubiquitylation system in Asgard archaea, the closest living relatives of eukaryotes.

Here, by analyzing 250 species of animals covering a large taxonomic spectrum, the authors show that archaea are common constituent of the animal gut throughout the animal kingdom, and identify six main genera/families of gut archaea revealing their abundance and diversity to be driven by host diet, evolutionary history and physiology.

Comparative genomics and proteomics of archaea and eukaryotes are used to explore the evolutionary history of eukaryotic chromatin, including modifications, catalytic functions and relationship with genomic parasites.

Synthetic carbon monoxide:formate oxidoreductase is designed for direct electron transfer between non-interacting CO dehydrogenase and formate dehydrogenase using an electron-transferring Fe-S fusion protein in T. onnurineus.