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2c817a13293f7c66495c5e1e3f4ed5a4
2011-07-22 11:48:42

Pseudomonas aeruginosa targets opponents' cell walls and immunizes itself against its own weapons When competing for food and resources, bacteria employ elaborate strategies to keep rival cells at bay. Scientists have now identified a pathway that allows disease-causing bacteria to attack other bacterial cells by breaking down their cell wall. Pseudomonas aeruginosa is a type of bacteria readily found in everyday environments. It easily forms colonies in a wide variety of settings, including...

2011-07-20 17:16:05

Pseudomonas deploys a toxin delivery machine to breach cell walls of rivals without hurting itself Microbiologists have uncovered a sneaky trick by the bacterium Pseudomonas aeruginosa to oust rivals. It deploys a toxin delivery machine to breach cell walls of competitors without hurting itself. Its means of attack helps it survive in the outside environment and may even help it cause infection. P. aeruginosa is a common bacterium that lives in soil, and also an opportunistic pathogen best...

2011-06-02 23:54:07

The research could lead to advanced therapies for patients with dry mouth University of Louisville researchers are one step closer to helping millions of people whose salivary glands no longer work because of disease or damage from treatment of diseases. The scientific finding of Douglas Darling, PhD, professor, Department of Oral Health and Rehabilitation, UofL School of Dentistry, and his team identified a protein sorting mechanism used by the salivary gland. The National Institutes of...

51c71fd85bf89d6504b7b739d2492bdb1
2011-04-23 10:50:00

Research in the worm is shedding light on a protein associated with a number of different human cancers, and may point to a highly targeted way to treat them.University of Wisconsin-Madison scientists were studying a worm protein called TFG-1, which is present in many cell types but whose exact role had never been understood. The scientists discovered that the protein controls key aspects of the movement, or secretion, of growth factors out of cells."TFG-1 has never been implicated in the...

31d2ca1c69b7fde78d6d6c8873720b4f
2011-02-04 08:24:14

The potentially deadly bacterium Salmonella possesses a molecular machine that marshals the proteins it needs to hijack cellular mechanisms and infect millions worldwide. In a paper published Feb. 3 online in Science Express, Yale University researchers describe in detail how Salmonella, a major cause of food poisoning and typhoid fever, is able to make these proteins line in up in just the right sequence to invade host cells. "These mechanisms present us with novel targets that might form...

2011-01-20 16:35:28

Just over a year after the earthquake in Haiti killed 222,000 people there's a new problem that is killing Haitians. A cholera outbreak has doctors in the area scrambling and the water-borne illness has already claimed 3600 lives according to officials with M©dicin Sans Frontires (Doctors without Borders). Stefan Pukatzki, a bacteriologist in the Faculty of Medicine & Dentistry at the University of Alberta, is hoping that down the road he can help prevent deadly cholera outbreaks....

2011-01-12 16:35:26

Researchers report that they are the first to show in molecular detail how one gene evolved two competing functions that eventually split up "“ via gene duplication "“ to pursue their separate destinies. The study, in the Proceedings of the National Academy of Sciences, validates a decades-old hypothesis about a key mechanism of evolution. The study also confirms the ancestry of a family of "antifreeze proteins" that helps the Antarctic eelpout survive in the frigid waters of the...

2010-06-14 13:02:42

A research team at the DOE Great Lakes Bioenergy Research Center (GLBRC) has developed a powerful new tool that promises to unlock the secrets of biomass degradation, a critical step in the development of cost-effective cellulosic biofuels. The details of this method were published online on June 11 in the journal Applied and Environmental Microbiology. Fulfilling the promise of cellulosic biofuels requires developing efficient strategies to extract sugar molecules in biomass polymers like...

060578cefcb8011889ed12e2d472e9121
2010-06-14 07:17:26

For a successful infection, bacteria must outwit the immune system of the host. To this aim, they deliver so-called virulence factors through a transport channel located in the bacterial membrane. In some bacteria this transport channel is formed like a syringe, enabling them to inject virulence factors directly into the host cell. Scientists from the Max Planck Society and the Federal Institute for Materials Research and Testing have now succeeded for the first time in elucidating basic...

4e188ac3e04dc69915b2290d1658a2001
2010-03-31 08:31:27

Bile secretions in the small intestine send signals to disease-causing gut bacteria allowing them to change their behavior to maximize their chances of surviving, says Dr Steve Hamner, presenting his work at the Society for General Microbiology's spring meeting in Edinburgh yesterday (March 30). The findings could allow us to better protect food from contamination by these harmful bacteria, as well as understand how they manage to cause disease. Bile is secreted into the small intestine and...


Latest Secretion Reference Libraries

45_d2fcb725ecc7dee8dbe887c765abd299
2011-04-14 14:17:06

Agrobacterium tumefaciens is the causal agent of crown gall disease (the formation of tumours) in over 140 species of dicot. It is rod shaped. Symptoms are caused by the insertion of a small segment of DNA into the plant cell. It is an alphaproteobacterium of the family Rhizobiaceae which includes the nitrogen fixing legume symbionts. They are pathogenic and provide no benefit to the plant. It also affects a wide variety of plants. In an economical sense it affects walnuts, grape vines,...

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Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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