Researchers: Importantly, we show that some archaeal histone variants are ancient and have been maintained as distinct units for hundreds of millions of years. Our work suggests that complex combinatorial chromatin that uses histones as its building blocks exists outside eukaryotes and that the ancestor of eukaryotes might have already had complex chromatin.
Move along, folks. No design to see here.
Clever little things, aren’t they? Change the host’s genome? So much intelligence in nature and it is supposedly all just an accident. Sure.
Researchers: Tohoku University scientists have, for the first time, provided experimental evidence that cell stickiness helps them stay sorted within correct compartments during development. How tightly cells clump together, known as cell adhesion, appears to be enabled by a protein better known for its role in the immune system.
Researcher: “Due to the heterogeneity of its nuclei, a single muscle cell can act almost like a tissue, which consists of a variety of very different cell types,” explains Dr. Minchul Kim, a postdoctoral researcher in Birchmeier’s team and one of the two lead authors of the study. “This enables the cell to fulfill its numerous tasks, like communicating with neurons or producing certain muscle proteins.”
Researcher: “Integrated stress response is like a city going through full lockdown,” Yan said. “If you only have 10 cases, you don’t want to come out and tell the city, ‘Let’s just hunker down and not do anything,’ or shut down all the productivity. You want the city to have a system to evaluate the severity of the stress — and to deal with it according to its severity.
Wilcox: Growing evidence has persuaded some researchers, however, that the nucleus might have arisen through a symbiotic partnership much like the one believed to have produced mitochondria.
At Knowable: Over the last decade, cell biologists have come to appreciate what many believe to be a whole new way that cells shape their internal landscape.
Researchers: Achromatium is special in many respects: It is 30,000 times larger than its “normal” counterparts that live in water and owing to its calcite deposits it is visible to the naked eye. It has several hundred chromosomes, which are most likely not identical. This makes Achromatium the only known bacterium with several different genomes.
Isn’t that remarkable? The phenomenon that enables cells to avoid committing suicide when “ordered” to do so (apoptosis) is so old that it goes back to the common ancestor of flies and mice. How much time was there for such a complex system to evolve purely randomly, as in a Darwinian scheme?
The problem isn’t with their believing that cells feature lots of intelligence but with their effort to equate human and cellular intelligence. Human intelligence is something quite different.
Already complex? No intermediate forms? Where have we heard that before?
We are told by many philosophers that life came to exist on Earth purely by chance. How likely is that, given the intricacy of the machinery that governs our bodies, such that someone needs to design AlphaFold to figure it out?
It’s getting hard to be a vestigial organ these days. It turns out that just about everything has a job.
Denton: “fine-tuning is far, far, far more intricate, exacting, and interdependent than we could have expected. It’s more exacting than we know even today.”