Present in every tissue of the body, ubiquitin appears to be involved in a dizzying array of functions, from cell cycle and division to organelle and ribosome biogenesis, as well as the response to viral infection. The protein plays at least two role
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Despite its discovery as a protein that seems to show up everywhere, at least in eukaryotic cells, researchers are only beginning to scratch the surface of all of the cellular functions involving ubiquitin. As a monomer, ubiquitin can bind and tag ot
Telomeres are repetitive, noncoding sequences that cap the ends of linear chromosomes. They consist of hexameric nucleotide sequences (TTAGGG in humans) repeated hundreds to thousands of times. Telomeres protect the protein-coding sequences of DNA on
A transition-state mimic has the power to bind an enzyme at its tipping point as strongly as any available inhibitor and more strongly than most, preventing enzymatic activity. In order to replicate the structure of an enzyme’s transition state, whic
There are five steps of autophagosome biogenesis: induction, expansion, vesicle completion, fusion, and cargo degradation. While much has been learned over the past few decades about how this process works, the big question that remains is where the
The tongue may be the epicenter of taste sensation, but taste receptors are scattered throughout the digestive and respiratory tracts.
While gut microbiota appear to have both positive and negative impacts on our health, in the guts of healthy, lean individuals, the good outweighs the bad. Gut bacteria, most of which reside in the large intestine, process many otherwise indigest
Gut bacteria that feed on healthy food appear to amplify the nutritional benefits of those foods. However, they also appear to amplify the undesirable effects of unhealthy food. Here are a few examples. Read the full story.
Exosomes are small membrane vesicles secreted by most cell types. Internal vesicles form by the inward budding of cellular compartments known as multivesicular endosomes (MVE). When MVE fuse with the plasma membrane, these internal vesicles are relea
Recent clinical trials have reignited the interest in simple anti-inflammatory drugs like aspirin for controlling the inflammation associated with cancer. The results suggest that these drugs reduced the risk of relapse as well as cancer formation ac
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