UCSD biologists discover cell's defense mechanism against class of disease-causing bacterial toxins
... U.S. hospitals, and Streptococcus pneumoniae, the bacterium responsible for seven million cases of otitis medi...jor role in infections from Helicobacter pylori, a bacterium that causes ulcers; Legionella pneumophila, which is responsible for Legionnaire's disease; and Stre...'Trap' crop saves Texas cross timbers melon production
...llowing Koch's postulates meant: Identifying the bacterium in tissue samples of plants during all stages of infection; Isolating the bacterium by growing it in culture dishes; Reinfecting a healthy plant with the isolated bacterium to see if...Bacteria spill their guts to aid researchers in quest for new antibiotics
...led MscL, found in the membrane of the single-cell bacterium Escherichia coli. The protein is essentially an em...sm." Previous studies on the MscL protein from the bacterium that causes tuberculosis provided the model for what scientists believed was MscL's structure in its...Finding the hole in the defenses of cavity-creating microbes
.... Streptococcus mutans or S. mutans, the dominant bacterium in our mouths, latches onto teeth, eats sugar, and...y around the world. The secret of its success? The bacterium rearranges its cell membranes to make itself impervious to the acid assault that it lets loose. "R...Tips from the journals of the American Society for Microbiology
...ic and phenotypic data combined indicated that the bacterium merits description as a new Nocardia species," say the researchers. "The present study suggests that Nocardia infections can be caused by multiple species of the bacterium." (A. Kageyama, K. Torikoe, M. Iwamoto, J.I. Masuyama, Y. Shi...Salmonella infects cells and saves itself by altering host membrane lipids
...ade foreign or unwanted materials. Once the bacterium is engulfed, it takes only about 30 minutes to rea...avoid this pathway to degradation. Salmonella, the bacterium that causes food poisoning and typhoid fever, can do that. "Salmonella have an elegant strat...TIGR president discusses significance of finding anthrax toxin
...reus containing anthrax toxin genes. The B. cereus bacterium is most commonly associated with food poisoning, a...curring microbe other than Bacillus anthracis, the bacterium that causes anthrax. She also discusses how this discovery fits into the ongoing debate about how to...Proteins transform DNA into 'molecular velcro'
...chers worked with a type of condensin found in the bacterium E. coli . Their experimental procedure consisted of attaching one end of a DNA molecule to a tiny plastic bead held by suction onto a micropipette. They then caused the DNA molecule to extend by flowing liquid past it, and exposed it to a solution c...Protein engineered to detect nerve gas
...alled "periplasmic binding proteins," from the gut bacterium E. coli. These proteins are normally part of the bacterium's chemical-sensing system by which it detects nutrients. Such protein receptors detect their target molecule via an "active site" that has a precise complementary shape and binding properties...Cell growth and death controlled by single pathway in lymphoma cancer model
...ymphocytes respond to inflammation provoked by the bacterium Helicobacter pylori (H. pylori). Infection by this bacterium is one of the main risk factors for developing gastric cancer, the world's second most common cancer...'Noisy' genes can have big impact
...at this type of random noise existed in the common bacterium E. coli . In later experiments, Raser and O'Shea set out to explore the mechanism underlying random noise in gene expression in a higher organism -- choosing the most primitive animal, yeast. Raser and O'Shea used an indicator technique developed by...Discovery of tiny microbes in ancient Greenland glacier may define limits for life on Earth
...eir modern relatives include the model ultra-micro bacterium Sphingopyxis alaskensis, which is abundant in cold Alaskan waters," Brenchley reports. She and Miteva are in the process of closely examining all the microbes they found in order to determine the identities and diversity of the species and to look f...Nanoparticles illuminate brain tumors for days under MRI
...e size of a small virus and is much smaller than a bacterium but much larger than an atom or standard gadolinium contrast molecule, Neuwelt said. "It's an iron oxide crystal surrounded with a carbohydrate or 'sugar' coating," Neuwelt said. This coating, called dextran, gives the particle a longer plasma half-l...Small, cold, & hungry: Ultra-small microbes from 120,000-year-old glacier ice sample
...eir modern relatives include the model ultra-micro bacterium Sphingopyxis alaskensis, which is abundant in cold Alaskan waters," Brenchley reports. She and Miteva are in the process of closely examining all the microbes they found in order to determine the identities and diversity of the species and to look f...U-M scientists use 21st-century technology to probe secrets of M. tuberculosis
...fter people inhale Mycobacterium tuberculosis, the bacterium that causes TB. The computer model is helping scientists learn more about this ancient pathogen, and why some people are able to fight off the infection, while others get sick. U-M scientists believe the answer could be hidden inside structures calle...Viruses clear bacterial contamination in chickens
...evel of contamination of chickens by the foodborne bacterium Campylobacter jejuni. They are using bacterial vi...s between predator and prey which allows both [the bacterium and the bacteriophage] to flourish. Here the use of bacteriophage to reduce campylobacters within t...Why some diabetics are at greater risk for UTIs
...ated the effects of insulin on Escherichia coli, a bacterium that commonly causes UTIs. An essential part of E. coli's ability to cause UTIs is its ability to adhere in the bladder. The researchers found that insulin along with glucose in concentrations similar to what are found in the urine of type-2 and ge...Antibiotic resistance risk from triclosan questioned
...the laboratory, repeated sublethal exposure of the bacterium Escherichia coli to triclosan led to the emergence of triclosan-resistance in the organism, which researchers believed might select for antibiotic resistance. In the research released today, Andrew McBain and his colleagues have discovered that the ...Are bacteria turning our own weapons against us?
... Scientists predict that the α2m is used by a bacterium to protect itself from attacks against its cell wall by the host immune system. This bacterial defence is active only when the invader is being counter-attacked by the host. "The way in which bacterial α2m functions makes it particularly attract......in La Jolla, California has modified a form of the bacterium Escherichia coli to use a 22-amino acid genetic co...s at once. The article, "A twenty-two amino acid bacterium with a functional quadruplet codon" is authored by J. Christopher Anderson, Ning Wu, Stephen W. Sant...