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Latest Cell membrane Stories

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2009-12-23 07:06:16

Communication between nerve cells is vital for our bodies to function. Part of this communication happens through vesicles containing signaling molecules called neurotransmitters. The vesicle fuses with the nerve cell membrane; the neurotransmitters are released and quickly recorded by the next nerve cell. It is crucial that new vesicles constantly are produced for the nerve cell communication continuously to take place. If parts of this communication do not work, it leads to nerve pain like...

2009-12-18 14:05:55

Shell of single-protein capsule degrades or remains intact based on environment Protein therapy "” the delivery of healthy proteins directly into human cells to replace malfunctioning proteins "” is considered one of the most direct and safe approaches for treating diseases. But its effectiveness has been limited by low delivery efficiency and the poor stability of proteins, which are frequently broken down and digested by cells' protease enzymes before they reach their intended...

2009-12-17 14:41:02

HZI researchers redefine the invasion mechanism of Salmonella "Based on our data, the molecular mechanism of infection employed by Salmonella has to be revised," says Klemens Rottner, head of the HZI research group "Cytoskeleton Dynamics". The group's results have now been published in the current issue of the scientific journal "Cellular Microbiology". Salmonella are highly adaptive bacteria. They can live in the presence and absence of oxygen and thus propagate in the gut. The ingestion by...

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2009-12-15 07:24:15

Scientists have identified a novel antifreeze molecule in a freeze-tolerant Alaska beetle able to survive temperatures below minus 100 degrees Fahrenheit. Unlike all previously described biological antifreezes that contain protein, this new molecule, called xylomannan, has little or no protein. It is composed of a sugar and a fatty acid and may exist in new places within the cells of organisms. "The most exciting part of this discovery is that this molecule is a whole new kind of antifreeze...

2009-12-02 19:20:52

The transmission of information from one neuron to the next is an unseen intricate ballet. Tiny vesicles "“ bubbles containing the chemical neurotransmitters that make information exchange possible"”travel to the tip of neurons (synapses), where they fuse with the cell's membrane in a process called exocytosis. The extra membrane is then captured in a process called endocytosis and recycled to form a new vesicle to enable the next cycle of release. The two processes, exocytosis...

2009-11-19 19:31:14

Since the discovery in 2007 that a component of human semen called SEVI boosts infectivity of the virus that causes AIDS, researchers have been trying to learn more about SEVI and how it works, in hopes of thwarting its infection-promoting activity. Now, scientists at the University of Michigan have determined the atomic-level, three-dimensional structure of a SEVI precursor known as PAP248-286 and discovered how it damages cell membranes to make them more vulnerable to infection with HIV....

2009-11-03 15:40:20

New research reveals how proteins that are critical for the transparency of the eye lens are properly sorted and localized in membrane bilayers. The study, published by Cell Press in the November 3rd issue of Biophysical Journal, analyzes how interactions between lipid and protein molecules can selectively concentrate proteins in certain regions of the cell membrane. All cells are surrounded by a dynamic semi-permeable structure called the plasma membrane. Cell plasma membranes are made of a...

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2009-10-22 14:29:21

Trying to understand the complex workings of a biological cell by teasing out the function of every molecule within it is a daunting task. But by making synthetic cells that include just a few chemical processes, researchers can study cellular machinery one manageable piece at a time. A new paper* from researchers at Yale University and the National Institute of Standards and Technology (NIST) describes a highly simplified model cell that not only sheds light on the way certain real cells...

2009-09-29 12:41:35

Just as people plug in to computers, smart phones and electric outlets to communicate, electric fish communicate by quickly plugging special channels into their cells to generate electrical impulses, University of Texas at Austin researchers have discovered. The fish generate electric fields to navigate, fight and attract mates in murky streams and rivers throughout Central and South America. They do so at night, while trying to avoid predators such as catfish that sense the electric fields....

2009-09-21 09:52:31

New data on signaling proteins, called G proteins, may prove important in fighting diseases such as cardiovascular, neurodegenerative disorders, and cancer. For many decades scientists have puzzled on "How signaling proteins transport and organize in specific areas of the cell?" Researchers from Nano-Science Center and Department of Neuroscience and Pharmacology provide yet unrecognized clues to solve this mystery. - We now begin to understand how signaling proteins recognize and transport to...


Word of the Day
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
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