The discovery of a new single-celled organism could explain the evolutionary origins of the complex cellular life, according to a study published today in the British journal “Nature”.
Scientists department molecular and cellular and molecular evolution of the Uppsala University (Sweden) biology argue that the emergence of a new arch explains the existence of the gap between simple cell bodies of the complex.
Although life is characterized by great diversity, all organisms are classified into two groups around, remind researchers in their study.
The morphology prokaryotic organisms, which include the bacteria and archaea are composed of single cells without nuclei, while the morphology of eukaryotic cells with nuclei are large and have a high degree of internal organization thanks, among others, to their cytoskeleton.
Both organisms are so different that the origin of eukaryotic organisms and their evolution from prokaryotic “remains one of the most controversial enigmas in modern biology” , remind researchers.
Recent studies had already suggested that the domain of eukaryotes might have arisen from archaea, but so far not been able to verify the existence of this specific form of “intermediate” simple life.
Scientists at the University of Uppsala, the researcher Thijs Ettema to the head, have identified this new bow in deep sea sediments, arguing that it could be the first prokaryotic organism known having a closer relationship with eukaryotic.
They called “Lokioarqueota” and has, say the experts, genes encoding proteins only found, for example, in parts of citesqueleto of eukaryotic organisms.
These features Genetic might have acted as a “starter kit” for the primitive eukaryotic organisms, contributing to the increase in cellular complexity, a trait typical of modern eukaryotic organisms. (I)
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