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Tag: "bacteria" at biology news

Loss of a universal tRNA feature reported

...ylate) at the -1 position of the tRNA as all other bacteria do. Amplification and tRNA sequencing approaches were used to confirm the findings. Sinorhizobium meliloti and Caulobacter crescentus are members of the alphaproteobacteria, a group of diverse organisms whose members have successfully adopted diff...

McBride shows DNA detective work with paper-eating bacteria that 'glide'

...or the microbe, allowing scientists to explore how bacteria use these parts to build and run their key functio...sed F. johnsoniae to study the motility of gliding bacteria for more than a decade. They cloned "mutants" of F. johnsoniae that are unable to move, and then at...

NASA predicts nongreen plants on other planets

...ed light absorbed and reflected by plants and some bacteria during photosynthesis, a process by which plants u...re most available. For example, there is a type of bacteria that inhabit murky waters where there is little visible light, and so they use infrared radiation du...

Bacteria control how infectious they become, study finds

The results of a new study suggest that bacteria that cause diseases like bubonic plague and seriou... the expression of these genes, thereby making the bacteria harmless, said Vladimir Svetlov, a study co-author and a research associate in microbiology at Ohio ...

Antifungal drug kills TB bug

...and biochemistry that set it apart from most other bacteria and that could provide new targets for antibiotic ...s chemicals and toxins that enter our system. Most bacteria have few, if any, P450s but we discovered that the TB bacterium has 20 different types." Even mor...

New mechanism for nutrient uptake discovered

...atives of these genes in a variety of species from bacteria to humans. In this study, the scientists wanted to identify how ammonium transport is regulated. Plants import nitrogen in the form of ammonium from the soil. The researchers found that the end portion, or so-called C-terminus, of the protein Arab...

Microbes start immune response by sneaking inside cells

...ense don’t necessarily rest quietly until invading bacteria lock onto receptors on their outside skins and rou...f Michigan scientists describe their findings that bacteria can barge inside these guard cells and independently initiate a powerful immune response. The stud...

Shedding new light on proteorhodopsin

...en deprivation probably explains why so many ocean bacteria express proteorhodopsin." Liphardt said that th... marine bacteria. The discovery implied that such bacteria possessed phototrophic as well as respiratory capabilities. This would be a critical adaptation for ...

Why doesn't the immune system attack the small intestine?

...perpetually on guard against foreign microbes like bacteria ?doesn't attack tissues in the small intestine that harbor millions of bacteria cells. In a study in the February issue of Nature Immunology, and which is currently available on t...

Yale biologists 'trick' viruses into extinction

...ncept using a non-human virus, and variants of the bacteria cells it infects." In ecology, a habitat that s...containing different mixtures of ordinary "source" bacteria and mutant trap cells that act as "sinks." Their research showed that when the number of trap c...

Infection detectives use disease 'fingerprints' to track common infections in children

...d a new method for identifying suspect viruses and bacteria that cause some of the most common acute infection...lues to an infection by tracking down the virus or bacteria causing it. But that doesn’t always work because the bacteria or virus may not be present in the blo...

Darwin's famous finches and Venter's marine microbes

...genomics allows us to sample the 99 percent of all bacteria that won’t grow in the lab," explains Manning. "GO...n the ocean or on land. For example, gram-positive bacteria are best known for their hardy spores, but this ability has been entirely lost in their marine relat...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

...ulting in inflammation. T. vaginalis also consumes bacteria that may be present in the urinary and genital areas, including the bacteria necessary for maintaining a normal healthy environment in the vagina. As a result, women infected wi...

Scientists find potential 'off-switch' for HIV virus

...e body loses its ability to repel other infectious bacteria and viruses, and eventually dies from assaults from these other "opportunistic" infectious invaders. On rare occasions, however, a virus will infect the T cell and become dormant. Why this individual viral infection would not begin to replicate w...

Protein discovery targets antibiotic-resistant bacteria

...to be a potentially good target in a wide range of bacteria that cause infectious diseases.?Because of the inc... The group is studying sensory pathways used by bacteria that enter our bodies and move from the stomach into the gastro-intestinal tract. “If we can block t...

Researchers from the UGR use a bacterium to obtain biopreservatives from food

...um against numerous bacteria, including pathogenic bacteria transmitted by food, "which makes it a suitable mo...eworthy bacteriocins those produced by lactic-acid bacteria (LAB), as they have been used to prepare fermented food, improve quality, and extend the average dur...

Researchers develop technique for bacteria crowd control

... manipulate, and separate a wide class of swimming bacteria has been identified through a collaboration betwee... the middle of the experimental cell. Concentrated bacteria form self-organized swirls and jets resembling vortices in vigorously stirred fluid. The method, ...

Researchers create artificial enzyme that mimics the body's internal engine

...me responsible for all aerobic life on Earth, from bacteria to people. It is also a crucial component of the cellular machinery that generates energy in our body. With such impressive credentials, you might expect that scientists would have a clear understanding of how CcO works. But they don't, according to ...

White blood cells in lung produce histamine seen in allergies

...histamine. "It's a direct effect of the mycoplasma bacteria on neutrophils. They induce neutrophils to produce...eneral this result might be. Does only one type of bacteria cause the effect, or do others, also? Is it limited to rodents, or does it carry forward to humans? ...

Genes may determine success of hip replacement surgery

... the body is unable to control infection caused by bacteria colonising the artificial implants. DNA samples were taken from all participants to test for genetic variations in genes responsible for generating matrix metalloproteinase 1, or MMP1 for short, interleukin 6, and vitamin D synthesis. MMP1 is a...

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