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Tag: "conserved" at biology news

Loss of a universal tRNA feature reported

...NAHis is a unique case of divergence from a highly conserved ancient tRNA recognition mechanism by an aminoacyl-tRNA synthetase. It will be of special interest to examine if the loss of this tRNA feature has resulted from the presence of an RNase P enzyme that is no longer capable of catalyzing abnormal cleava...

New details on how the immune system recognizes influenza

...rotect against another strain. But if epitopes are conserved between virus strains, the immunity a person has d...ol they developed, the LIAI team found hundreds of conserved influenza virus epitopes in the database, including those between avian H5N1 and strains of human in...

Mutation improves memory, may lead to memory-enhancing pill

... "Quite different molecular machineries, widely conserved from sea slugs to rodents, are thought to underlie these two components. While modifications of pre-existing proteins are sufficient for the transient changes, new gene expression is required for those that are sustained," the researchers said, empha...

Newly identified mechanism for silencing genes points to possible anti-cancer strategies

...uggested that the mechanism involved has long been conserved in evolution." ...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...The cool thing is that many of the clock genes are conserved between flies and vertebrates; we have 'period' and we have 'timeless'," said Schneider. "As usual, it doesn't work in exactly the same way, but what the fly does is let us find genes that are involved in the process, and then go figure out exactly h...

How to steer a moving cell

... "This is apparently a fundamental, evolutionarily conserved process in migrating cells. So it clearly has an important purpose to the cell." A network of proteins called the cytoskeleton, the cell’s internal scaffolding, determines cell shape, helping the cell to grow and develop "growth cones." These a...

Puzzling plankton yield secrets to role in evolution/global photosynthesis

...he PNAS paper’s senior author. "Overlapping genes conserved across the species may enable them to cross-regulate their expression, while species-specific chromosomes with horizontally transferred genes can account for changes in the cell surface to adapt to different ecological niches." Grigoriev and his col...

Researchers demonstrate way to control tree height

... is a small plant in the mustard family, have been conserved through 50-100 million years of evolution and can perform more or less the same function in poplar trees,” Strauss said. “The modified trees themselves look pretty much normal, just a lot smaller, and a little more compact or bushy.” Altogether, t...

Potent possibilities for parasite attack

...citing possibility that some virulence factors are conserved between bacterial and eukaryotic intracellular pathogens," said Jeremy Mottram, a collaborator on the project who is a Professor in the Wellcome Centre for Molecular Parasitology at the University of Glasgow. Some families of genes that determine ...

New findings challenge established views on human genome

...olutionary constraint – that is, most likely to be conserved as species evolve. However, the ENCODE effort found about half of functional elements in the human genome do not appear to have been obviously constrained during evolution, at least when examined by current methods used by computational biologists. ...

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