Articles tagged with Bacterial Chemotaxis
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Researchers discovered that certain bacteria wrap their rotating flagella around their cell bodies to form a screw thread, allowing them to propel forward through narrow passages. This mechanism enables bacteria to navigate complex environments and even infect host insects.
Bacteria move through liquids using propellerlike tails called flagella, which alternate between clockwise and counterclockwise rotation. Researchers propose a tug-of-war mechanism instead of the traditional equilibrium 'domino effect' model, where proteins lining the tail exert pressure on their neighbors.
In scalding hot water, bacteria use a unique 'reverse-flow dance' to move upstream, sensing water flow direction. This behavior is common among heat-loving bacterial species with elongated shapes.
New research reveals how disease-causing bacteria navigate human intestines, shedding light on potential treatments for intestinal infections. Bacteria are attracted to indole, a stinky chemical that helps fertilize the gut, rather than repelled by it.
University of Virginia School of Engineering and Applied Science professors William Epling and Roseanne Ford were elected as fellows to the American Institute of Chemical Engineers. They are recognized for their expertise in environmental catalysis and bacterial chemotaxis, respectively.
A team of researchers at UC Davis Health discovered a novel bioelectrical mechanism that allows Salmonella bacteria to navigate the gut lining and find vulnerable entry points. The study found that Salmonella bacteria detect electric signals in FAE, which helps them move towards openings in the gut where they can enter.
Researchers have discovered a novel enzyme family related to bacterial pathogenicity in Gram-negative bacteria. The study revealed that enzymes involved in OPG synthesis and regulation play crucial roles in bacterial infection capability.
Scientists from the Institute of Industrial Science have developed a theoretical model for optimal search strategy in biological systems, which may help design new drones or nanobots. The model uses stochastic optimal control theory to analyze chemotaxis, a process of attraction to chemical gradients.
Researchers found that Pseudomonas bacteria use a network of proteins to regulate twitching and respond to mechanical forces, allowing them to navigate based on what they feel in front of them. This 'sense of touch' helps the microbes move forward in the same direction when moving as a group.
Researchers from The University of Tokyo have shown that the standard model biologists use to describe bacterial chemotaxis is mathematically equivalent to optimal dynamics. By using nonlinear filtering theory, they found that the system used by bacteria is indeed optimal for efficient sensing and adaptation in noisy environments.
Researchers developed a more accurate model of how bacteria search for nutrients by considering both chemotaxis and chemokinesis. The new model reveals that combining these two motions enhances population responses to nutrient distributions.
Researchers at the NIH identified a key protein, McpC, that enables Salmonella to swim straight towards infected cells. This discovery may lead to the development of new antibacterial therapies to combat intestinal infections.
Scientists have developed a self-propelled chemical trap to corner and destroy pathogens in body fluids, reducing the need for antibiotics. The device uses a magnesium metal engine propelled by hydrogen bubbles, trapping bacteria with an acid-soluble polymer cage that releases a toxin to kill them.
Researchers at University of Jyväskylä found that bacteria-infecting viruses preferentially bind to mucosal surfaces, providing extra immunity against bacterial infections. This symbiotic model shows phages enriched in mucus, where encounters with host bacteria are more probable.
New research finds that bacteria launch exploration when thriving in their current environment, using a mechanism to optimize population movement. The study also shows that slower bacteria have advantages at smaller distances, contradicting traditional wisdom that faster is always better.
Researchers at the University of Oregon discovered that Helicobacter pylori uses a protein called TlpD to sense bleach and swim toward it. The bacteria Salmonella enterica and Escherichia coli can use similar proteins to detect bleach in their environment.
Scientists have designed gold nanoparticles to mimic bacterial swarming behavior, creating a collective movement towards glucose gradients. The artificially created nanoswimmers exhibit chemotactic behavior, similar to bacteria, and demonstrate the potential for studying collective intelligence on the nanoscale.
Researchers found that curved shapes can facilitate efficient swimming and chemotaxis, but come with higher cell construction costs. This discovery opens questions about the shape of disease-causing bacteria and its potential industrial applications.
Researchers discovered E. coli bacteria change behavior to navigate tiny obstacle courses, defying predictions of slowing progress. The study's findings have implications for biology, medicine, and robotic search-and-rescue tactics.
Researchers at ETH Zurich discovered that bacteria in a microfluidic T-maze exhibit diverse chemotactic sensitivity due to genetic variations, allowing some individuals to outperform others. This phenotypic heterogeneity may provide an evolutionary advantage for the bacteria, enabling them to adapt to changing environments.
Researchers have identified the structure of a central protein used by archaea to determine direction, revealing significant differences from bacteria. This discovery sheds light on how archaea can adapt to extreme environments and colonize new habitats.
Staphylococcus aureus, a common bacteria causing severe infections, has developed mechanisms to evade the human immune system. Researchers have identified various tactics used by S. aureus to slow down neutrophil migration, impede priming, and even kill neutrophils. Understanding these strategies can lead to new therapeutic approaches.
Researchers discovered Vibrio cholerae attraction to bile taurine, shedding light on its survival and pathogenicity. The finding may lead to prevention of infection and development of new drugs for cholera.
A social amoeba uses DNA nets to trap and kill invading bacteria, a mechanism similar to that seen in mammalian immune cells. This discovery highlights the convergent evolution of immune systems across species.
Researchers have discovered a novel receptor in Vibrio fischeri that senses fatty acids, allowing the bacterium to migrate towards these compounds. This finding sheds light on the symbiotic relationship between the Hawaiian bobtail squid and its luminescent bacteria.
Researchers found that genetic identical bacteria can behave differently after cell division due to unequal distribution of cellular organelles. This diversity is crucial for bacterial survival, allowing populations to adapt to new opportunities and threats.
Researchers have discovered a defect in the cell-targeting ability of Helicobacter pylori bacteria that leads to reduced inflammation in the stomach. The study found that the bacteria's chemotaxis, or movement towards specific chemicals, plays a crucial role in triggering chronic inflammation.
A new study demonstrates that even a simple microbe can achieve sophisticated sensory adaptation, allowing its behavior to remain consistent in ever-changing background conditions. Researchers found that E. coli responds to relative changes in sensory inputs rather than absolute concentrations.
A team of researchers at Imperial College London developed a mathematical model to explain chemotaxis in bacteria. They found that Escherichia coli adapts to potentially toxic molecules more quickly than to nutrients.
Harwood's discovery of the genes and enzymes involved in lignin degradation has major implications for environmental pollution and carbon cycling. Her work on light-driven nitrogenase processes also holds promise for sustainable energy production.
A team of scientists used PALM microscopy to show that bacterial membrane proteins can spontaneously form clusters without being actively distributed. The researchers found that random lateral protein diffusion and protein-protein interactions generate complex, ordered patterns in the chemotaxis network.
Researchers discovered that Myxococcus xanthus uses a rippling motion to hunt other bacteria, with the pattern adapting to prey density. The study found that individual cells line up and move in an alternating pattern, producing high and low cell density waves.
Researchers analyzed dense colonies of Escherichia coli bacteria to understand biomechanical ordering. They found a dynamic change from disorder to alignment and developed a model of collective cell dynamics.
Researchers at MIT demonstrated that marine bacteria, specifically P. haloplanktis, use their rapid swimming abilities to locate and exploit tiny nutrient patches in the ocean. This behavior has global implications for the oceans' health during climate change and could impact the carbon cycle.
Researchers reprogram E. coli to detect and follow specific chemical signals, opening new frontiers in environmental cleanup and drug delivery. The custom chemo-navigational system could be used to target diseased cells while sparing healthy ones.
Researchers have developed AgentCell, a digital bacterial simulation that can study entire populations of cells in 3D, enabling rapid experimentation and simulation of cellular behavior. This innovation has potential applications in cancer research, drug development, and combating bioterrorism.
Researchers found that bacteria in mazes congregate in small rooms and dead-end pathways, suggesting a survival mechanism. This active seeking behavior could lead to new drugs disrupting the congregating behavior of harmful bacteria.