The findings are being published this week in an article in Proceedings of the National Academy of Sciences in the U.S. With the aid of microarray technology, the scientists have managed to monitor the expression of all of the roughly 2,000 genes in microorganisms that grow at 80o C, so-called hyperthermophiles.
These organisms, from the Sulfolobus genus, represent life’s third evolutionary line, the archaea, and are found in hots springs all over the world, for instance in the vicinity of the volcano Vesuvius outside Naples, in Iceland, and in Yellowstone National Park in the U.S. The extreme living conditions, where these organisms grow optimally in hot acid, make them interesting not only because of their unique biology but also as a model system in theories of the origins of life in warm environments during the early development of the earth.
“Knowledge of these organisms is also of interest in our search for life on other planets and moons, with their extreme environments,” says Rolf Bernander, professor of molecular evolution at the Center for Evolutionary Biology (EBC), who is responsible for the study, together with doctoral candidate Magnus Lundgren.
They have identified some 160 genes that are specifically activated at various stages when the cells produce a new copy of the chromosome (replication), segregate two daughter chromosomes (mitosis), and then divide (cytokinesis). The team has previously shown that the chromosomes in Sulfolubus species, unlike those in all other species that lack a cell nucleus, are replicated from three different starting points instead of a single one. This was surprising, since this was previously seen as one of the most important borderlines between organisms with or without cell nuclei. Thus, these unique organisms lack cell nuclei, but nevertheless evince replication and cell cycles similar to those of higher organisms.
“Together with the fact that many of archaea genes are very similar to their counterparts in higher organisms, this means that the findings may be of significance in our understanding of cell growth and cell-cycle regulation in humans, for example,” says Rolf Bernander.
Anneli Waara | alfa
New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland
19.01.2017 | University of Gothenburg
Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences