Eukaryotes in search of their roots #5

And so, as a result of long-term search and analytical work, Swedish scientists have found a microorganism that deserves to be a candidate for the role of a universal archaea ancestor (or sister group, because the probability of survival of the ancestral form is very low). When scanning a sample taken by a robot at a depth of almost three and a half kilometers in the Northern Glacial Ocean between the Norwegian coast and the Svalbard archipelago, a new type of archaea with an unprecedented set of eukaryotic-like genes was characterized. The sampling site was located in the immediate vicinity of Loki's hydrothermal Castle, named after the Scandinavian deity of debauchery and deception. Accordingly, the new type was named Lokiarhaeota. First, a metagenomic analysis of the sample was performed, and after processing the cultivation data using complex algorithms for filtering and combining data, an almost complete (92%) genome of the Lociarchaea was collected.

By examining the qualitative composition of the Lokiarchean genome, scientists have discovered striking similarities between lokiarchean and eukaryotic anemones, and have also found possible analogues of proteins that are involved in ensuring the dynamics of actin filaments (the latter, by the way, are described in prokaryotes for the first time). Another unexpected finding was the number of genes encoding GTPases of the Ras superfamily, important signaling molecules that control cytoskeletal rearrangements, formation of membrane vesicles, and transit of macromolecules between the nucleus and cytoplasm in eukaryotic cells. The paradox of the situation lies in the fact that the number of genes of GTPases in lociarchae exceeds that for some eukaryotes, whereas up to this point only single GTPase analogues have occurred among prokaryotic organisms. Such features of a cellular microorganism are characteristic, for example, of amoebas capable of actively capturing prey. Of course, it is difficult to draw conclusions about the real possibilities of this archaea from the gene composition alone. But all the same, scientists note that the production of mitochondria most likely occurred after the process of acquiring archaea features of a complexly constructed cell began. In addition, the researchers also discovered genes that are responsible for endosomal traffic and ubiquitin-dependent protein degradation, thus completing the assembly of the atomized eukaryome.

Opponents and skeptics would point out that such extraordinary results can be explained by contamination of the archaebacterial sample by modern eukaryotes. But scientists note the absolute infallibility of their conclusions from the metagenomic data. Firstly, PCR using specific primers did not reveal traces of eukaryotic 18S ribosomal RNA, and secondly, the high quality of genome assembly showed that pre-eukaryotic genes are framed by typical archaebacterial genes and organized as operons characteristic of prokaryotes. So it looks like this is not a prank by the brawler Loki (in scientific terms, not an artifact), but a really serious discovery in the study of the evolutionary history of eukaryotes. After all, evolutionary biologists are just a group of eukaryotic organisms that seek to find their roots. Many punters overlook the importance of timing when claiming a first‑deposit bonus, yet aligning it with a busy sports calendar amplifies its impact. Weekend derbies, cup finals, or international tournaments offer abundant opportunities to place value‑backed accumulators. The 1xbet promo code today enters this equation as your essential tool, unlocking a match that doubles your starting capital. Following activation, 100% up to €130 welcome bonus is credited, providing sufficient funds to cover multiple high‑profile clashes across various disciplines. To meet the turnover, select with one slightly risky outsider.