Archaea Current Biology Laura Eme, W. Ford Doolittle  Current Biology  Volume 25, Issue 19, Pages R851-R855 (October 2015) DOI: 10.1016/j.cub.2015.05.025 Copyright © 2015 Elsevier Ltd Terms and Conditions

Figure 1 Commemorating the Archaea. Plaque in front of Burrill Hall at the University of Illinois at Urbana-Champaign, where Carl Woese began oligonucleotide cataloguing of 16S rRNA (photo by W.F. Doolittle). Current Biology 2015 25, R851-R855DOI: (10.1016/j.cub.2015.05.025) Copyright © 2015 Elsevier Ltd Terms and Conditions

Figure 2 Schematic phylogenetic tree of Archaea. Lineages belonging to the TACK supergroup are shaded in teal, Euryarchaeota are in purple, while the orange shadings indicate lineages of nano-sized archaea proposed to form the ‘DPANN’ supergroup. Polytomies (mutiple apparently simultaneous branchings) highlight uncertainties about phylogenetic relationships between lineages. The tree is unrooted and purple triangles indicate favored hypotheses regarding the position of the root; between Euryarchaeota and the rest, within Euryarchaeota, and at the base of, or within, DPANN. The yellow triangle points at a possible branching point for the eukaryotic lineage (either sister to the TACK supergroup, or within it — possibly sister to the Lokiarchaeota) with the other favored one being at the base of all Archaea (not shown). Symbols indicate the type of DNA collection method used to determine genome sequence (metagenome, co-culture, single-cell genomics or enrichment culture), unless pure culture was used for at least one representative organism (no symbol). Additional lineages uncovered via 16S rRNA-based diversity surveys alone, without extensive genomic data available, are not depicted. Current Biology 2015 25, R851-R855DOI: (10.1016/j.cub.2015.05.025) Copyright © 2015 Elsevier Ltd Terms and Conditions

Figure 3 Taxonomic distribution of archaeal orthologs of cell-division system components and of eukaryotic signature proteins. Archeal cell-division components are shown on the left: FtsZ-based systems are depicted in blue, actin-based in pink and Cdv-based in teal. Eukaryotic signature proteins are shown on the right: proteins involved in cell-shape determination (pink); protein recycling (green); translation (purple); transcription (yellow); DNA packaging, replication and repair (pink-violet); and cell division, vesicle formation and membrane remodelling (teal). Some components appear in both categories. Phylogenetic relationships are depicted as a consensus of recent phylogenomic analyses. Color-filled circles indicate the presence of homologues in all members of a lineage, whereas half-filled and white circles denote patchy distribution and absence of homologues, respectively. aVps28-like, bEAP30 domain and Vps25. Current Biology 2015 25, R851-R855DOI: (10.1016/j.cub.2015.05.025) Copyright © 2015 Elsevier Ltd Terms and Conditions