The bacterium Photorhabdus luminescens is a constant companion of some roundworms. These worms assault insect larvae, thereby infecting them with the bacteria; the pathogens then attack the cells of their ...
Mar 21, 2013
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Food poisoning caused by Bacillus cereus can lead to diarrhea which is probably caused by a 3-component toxin which is produced by this bacteria strain and which perforates and kills cells.
Jan 04, 2013
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(Phys.org)—New research shows how some bacterial cells keep a 'suicide complex' ready to hand at all times.
Dec 27, 2012
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For snakes, spiders, and other venomous creatures, the "business end," or active part, of a toxin is the area on the surface of a protein that is most likely to undergo rapid evolution in response to environmental constraints, ...
Feb 23, 2012
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One of the big mysteries in biology is why cells age. Now scientists at the Salk Institute for Biological Studies report that they have discovered a weakness in a component of brain cells that may explain ...
Feb 03, 2012
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Toxin proteins are genetically engineered into our food because they kill insects by perforating body cell walls, and Professor Rikard Blunck of the University of Montreal's Group for the study of membrane proteins (GEPROM) ...
Sep 12, 2011
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Toxins produced by plants and bacteria pose a significant threat to humans, as emphasized by the recent effects of cucumber-borne Shiga toxin in Germany. Now, new research published on July 21st by the Cell Press journal ...
Jul 21, 2011
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A study led by Spanish researchers from Universitat Autonoma de Barcelona (UAB) describes one of the mechanisms in which pathogenic bacteria populations control the way they spread over the surface of the ...
Jun 22, 2010
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New research in the Journal of Cell Biology helps explain how the toxic protein responsible for botulism can enter circulation from the digestive system. The study appears online May 10.
May 10, 2010
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Scientists have known for a long time that when DNA is damaged, a key enzyme sets off a cellular "alarm bell" to alert the cell to start the repair process, but until recently little was known about how the cell detects and ...
Aug 13, 2009
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(PhysOrg.com) -- Hematopoietic stem cells are capable of manufacturing all types of blood cells. But which factors influence the production of a specific type of cell? Until now, it was thought that this was ...
Jul 30, 2009
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(PhysOrg.com) -- New structures of a botulism toxin interacting with a mimic of the nerve-cell protein it destroys suggest new ways to block this often-fatal interaction. Indeed, the mimic molecules have such ...
Jun 22, 2009
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A technique that “silences,” or turns off, genes shows promise as a potential new treatment for liver fibrosis — the disease that leads to cirrhosis — scientists in Tennessee are reporting. Their study is scheduled ...
May 27, 2009
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Several bacterial pathogens use toxins to manipulate human host cells, ultimately disturbing cellular signal transduction. Until now, however, scientists have been able to track down only a few of the proteins that interact ...
Apr 22, 2009
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(PhysOrg.com) -- Scientists at the Naval Research Laboratory recently reported the detection of toxins with unprecedented speed, sensitivity, and simplicity. The approach can sense as few as a few hundred molecules in a drop ...
Mar 13, 2009
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