Articles tagged with Myosins
Actin filaments and a fast plant motor protein called Chara corallina myosin XI (Cc XI) were combined to observe spontaneous ring formation. The rings rotated continuously in one direction and remained fixed, even as individual filaments moved within them.
Developed by a research team at POSTECH, the robot uses human muscle proteins as inspiration to generate strong force while navigating through tight spaces. The technology has potential applications in various fields, including medical settings, industrial environments, home cleaning, and caregiving robots.
Researchers discovered that gamma-actin increases the rigidity of cell membranes while beta-actin filaments are less stiff. This mechanism may contribute to hearing loss by affecting the apical membrane's stiffness essential for auditory function.
Increasing the spacing between integrin-ECM binding domains on the extracellular matrix can boost the efficiency of ultrasound treatment applied to kill cancer cells. A new study found that this increased spacing triggers myosin forces, pumps more calcium inside, and promotes cell death.
A clinical trial found that mavacamten, a cardiac myosin inhibitor, reduced biomarkers of cardiac wall stress and injury in patients with heart failure. The treatment showed no significant reduction in left ventricular ejection fraction.
The study reveals two distinct modes of endosomal fusion: homotypic fusion, where small vesicles fuse rapidly, and heterotypic fusion, where large vesicles absorb endosomes. Mathematical analysis and experiments suggest that actin dynamics plays a crucial role in promoting homotypic fusion.
The study reveals changes in motor protein structure and energy consumption during hibernation, highlighting key differences between large and small hibernators. Myosin plays a crucial role in non-shivering thermogenesis, with smaller mammals experiencing increased ATP consumption at lower temperatures.
S100A11 plays a specific role in the initiation of focal adhesion site disassembly, rather than the disassembly process itself. The protein is recruited to adhesion sites through a force-dependent mechanism involving non-muscle myosin II-driven stress fiber contraction and intracellular Ca2+ influx.
Researchers at Max Planck Institute of Molecular Physiology developed an innovative imaging technique to visualize the cardiac thick filament in its native environment. The resulting high-resolution image reveals new insights into the molecular organization and function of the sarcomere, a crucial component of heart muscle contraction.
CNRS scientists have identified a molecule that prevents parasites of Plasmodium from invading blood cells, paving the way for a new class of antimalarials. The discovery is based on the key role of myosin A in malaria infection and its inhibition by KNX-002.
The study, led by Professor Takashi Miura of Kyushu University, has discovered that interdigitated cell boundaries have a mathematically scaling pattern with self-similarity. The team used the Edwards-Wilkinson model to simulate and understand the molecular mechanism responsible for these dynamics.
Researchers discovered that myosin motor proteins must be activated before muscles can contract, potentially leading to breakthroughs in treating inherited cardiac conditions. This new understanding could lead to medical remedies for diseases like dilated cardiomyopathy and hypertrophic cardiomyopathy.
Researchers identified a link between skeletal muscle atrophy and the loss of two types of myosin. The study showed that mice lacking these proteins experienced severe muscle atrophy and died within four weeks, providing a potential animal model for treating human muscle-wasting disorders.
Researchers have identified a key enzyme in muscle that contributes to cancer-induced muscle wasting. Targeting this enzyme, UBR2, may help preserve muscle mass and function in cancer patients. The study's findings offer new hope for the treatment of cancer cachexia, a complication affecting 60% of all cancer patients.
Researchers at Tokyo Metropolitan University discovered that a protein excreted by type I muscle fibers can differentiate surrounding myoblasts into type I fibers, upending the notion that fiber ratios are fixed at birth. This finding has significant implications for treating conditions such as type 2 diabetes and aging populations.
Researchers found significant and sustained improvements in left ventricular outflow tract gradients, health status, symptoms, and exercise capacity among patients taking mavacamten. The drug appears to be safe and well-tolerated long-term with no new adverse events reported.
Researchers from the Max Planck Institute have obtained the first high-resolution 3D image of the muscle protein nebulin using electron cryo-tomography. The structure reveals that each nebulin repeat binds with an actin subunit, acting as a ruler to dictate filament length and interacting with neighboring actin subunits to stabilize it.
Researchers found sequence changes in the beta myosin protein that explain the difference in contraction velocity between small and large mammals, with human and rat proteins differing at nine key sites. The study suggests these changes enabled slower heart rates in larger animals as they evolved from smaller species.
Researchers at Max Planck Institute used electron cryo-tomography to obtain detailed images of frozen muscle tissue, revealing the three-dimensional organisation of sarcomeres and their interacting filaments. The study provides new insights into muscle contraction and relaxation mechanisms.
Researchers at Wayne State University aim to address impaired relaxation of heart muscles through novel biomechanical tests and imaging techniques. The project, funded by the National Heart, Lung, and Blood Institute, will investigate how mechanical properties of the heart relate to models of heart failure.
A team of scientists has discovered that the mechanical events of a molecular motor precede biochemical events in force generation. This finding challenges the long-held view that biochemical events gate the force-generating event, and could lead to new treatments for conditions like heart failure and cancer.
A team of scientists has developed a visualization technique that reveals the intricate mechanism by which a key protein involved in muscle activity shuts itself down to conserve energy. This discovery provides new insights into how genetic mutations in this protein can lead to various diseases.
Researchers have created a detailed model of how the brain learns and memorizes, shedding light on long-term potentiation and depression. The model simulates the competition between exocytosis and endocytosis of AMPA-type glutamate receptors, revealing the molecular mechanisms underlying learning and memory formation.
A new drug candidate, MPH-220, has been developed to target muscle spasticity after stroke and nervous system defects. By inhibiting the effector protein of muscle contraction, it may alleviate symptoms with a single pill per day.
Scientists discovered how deadly parasites from the phylum Apicomplexa, such as Plasmodium and Toxoplasma, glide into human cells using actin and myosin proteins. The study reveals the molecular structure of essential light chains that facilitate gliding movements.
Researchers successfully promoted plant growth and increased seed yield by expressing high-speed-type myosin XI from Arabidopsis in Camelina sativa, a promising plant for biodiesel. This technology is expected to increase productivity per area unit and has potential applications in other plant species.
Researchers at UMass Amherst have developed an alternative energy source for muscle protein myosin, enabling controlled muscle activity and potentially treating conditions like cerebral palsy and chronic heart failure. The new energy source, Azobenzene triphosphate, has been shown to modulate myosin function and generate force and velo...
Scientists at Max Delbrück Center develop mouse model to study sarcomere structure and function, identifying key proteins involved in muscle contraction and relaxation. They discover that myosin enters the Z-disc, challenging current models of sarcomere mechanics.
Researchers at the University of Warwick have developed a new microscopy technique that allows them to visualize the dynamics of protein assemblies in cells, providing insights into cellular muscle movements. The study reveals that myosin proteins exhibit different regimes of fluctuations, enabling the cell to exert forces and propagate.
A recent study has revealed that cardiac myosin, a prevalent protein in the heart, can cause blood to thicken or clot during a heart attack, worsening damage to heart tissue. Researchers are now working on creating a therapeutic compound to target this protein's procoagulant activity.
Researchers at RIKEN found that mechanical forces sculpt the embryo, creating a precise fold despite genetic variation and environmental fluctuations. This discovery highlights the importance of mechanical self-organization in ensuring developmental consistency.
A study published in Circulation reveals that an imbalance in the ratio of active and inactive myosin protein disrupts heart muscle contraction and relaxation, leading to hypertrophic cardiomyopathy. Treatment with a small-molecule drug restores proper contraction and energy consumption in human and rodent heart cells.
Researchers used in vivo imaging to observe how cells move and generate forces in living tissues, revealing new clues on why MYH9 gene mutations lead to various diseases. The study demonstrates that altered myosin activity results in defects in epithelial morphogenesis due to slower cell movements.
Researchers at Johns Hopkins Medicine have discovered that the compound 4-HAP can reduce metastatic tumor formation in mouse models of human pancreatic cancer. By stiffening cells and overwhelming their ability to invade nearby tissue, 4-HAP may help halt the progression of disease-like behavior in pancreatic cancer cells.
A new study reveals that bat wing muscles are uniquely adapted to operate at low temperatures during flight, a phenomenon with implications for human exercise in extreme conditions. By understanding this adaptation, scientists hope to develop strategies to improve human performance and safety in cold weather.
Researchers at LMU Munich discovered that myosin VI directly engages with the plasma membrane, dynamically altering its shape. This interaction enables important cellular processes such as endocytosis and membrane protrusions.
Recent studies examining three mutations at the molecular level found separate mechanisms at work in hypertrophic cardiomyopathy. Researchers suggest that multiple mechanisms may be responsible for the disease, rather than a single explanation. This discovery holds promise for developing new treatments for this condition.
Scientists have found that invasive skin cancer molecules reprogram healthy immune cells, allowing the cancer to spread. Researchers discovered that blocking certain chemicals can help prevent the aggressive skin cancer from coming back after treatment.
A team of researchers has discovered a single protein that induces spiral motion in another molecule, causing cells to twist and trigger lateralized behavior. This protein, Myosin 1D, is capable of inducing asymmetry at all scales, from molecular to behavioral levels.
Researchers have discovered that a specific gene mutation, R403Q, affects the force and velocity of myosin molecule contractions in individuals with hypertrophic cardiomyopathy. This finding has implications for developing targeted drugs to improve heart function in affected patients.
Researchers found that a protein called myosin IIA contracts to give red blood cells their distinctive dimpled shape, shedding light on sickle cell diseases and other disorders. The discovery could lead to new treatments for conditions where red blood cells are deformed.
A recent study by the University of Kent has identified Myosin VI as a key protein involved in the production of specific genes linked to breast cancer cell growth. This discovery may lead to new diagnostic clues and therapeutic targets for patients with oestrogen-sensitive breast cancer.
Researchers at Tohoku University have introduced a novel intermolecular surface force that explains the actomyosin driving mechanism. The discovery sheds new light on muscle contraction, highlighting a previously unexplained aspect of the myosin power stroke model.
A study using fruit flies has identified a mechanism behind a human heart condition that causes the heart to enlarge and fail. The mutation interferes with heart muscle relaxation, preventing it from fully filling with blood and pumping it out.
The study reveals unexpectedly large conformational changes in the myosin molecule during the pull, generating force and a paradigm for nanomachine construction. Myosin converts ATP energy into mechanical work through hydrolysis, with a previously unobserved conformational change providing new perspectives on its function.
Researchers used electron microscopy to capture the first three-dimensional image of a myosin filament in a Thai water bug. This discovery sheds light on how mutations in myosin can cause cardiomyopathy, a disease of the heart muscle. The study provides new insights into muscle contraction and relaxation.
Scientists have found that cell boundary elongation is driven by the activity of actomyosin networks in neighboring cells, not within the same cell. This discovery sheds light on the complex processes involved in tissue development and organ specialization.
Researchers at UT Southwestern Medical Center identified a previously unrecognized enzyme, MLCK4, that could optimize contraction and prevent heart failure. The study provides the first three-dimensional structure for any member of the MLCK family and sheds light on the optimal phosphorylation level for normal heart function.
Researchers develop small molecule inhibitor to address hypertrophic cardiomyopathy, a common cause of sudden death in young athletes. The treatment has shown promising results in mice bred with the mutation, preventing the disease from surfacing.
A team of scientists has discovered the precise timing of myosin's power stroke, a process that generates movement in muscles. The findings reveal that the lever arm swing 'gates' phosphate release, enabling myosin to efficiently generate force and motion.
Researchers have developed a rolling DNA-based motor that's 1,000 times faster than any other synthetic DNA motor, offering potential for real-world applications in disease diagnostics. The new motor uses a burnt-bridge mechanism to guide its movement, allowing it to travel one centimeter in seven days.
Biologists at SDSU discovered that fruit flies with two muscle protein mutations have nearly three-quarters of the myosin protein function restored, compared to those with a single mutation. This finding suggests a new view of human heart disease and potential treatments.
Scientists from the Scripps Research Institute have developed a new therapy that selectively erases drug-associated memories, preventing relapse in animal models of methamphetamine addiction. The treatment, which involves a single injection of blebbistatin, successfully disrupted long-term storage of drug-related memories and blocked r...
Researchers at the University of Vermont have discovered that myosin-binding protein C (cMyBP-C) is essential for maintaining precise tuning in the heart's muscle cells. The protein plays a crucial role in controlling the interaction between myosin and actin, allowing for synchronized contraction and efficient pumping of blood.
Researchers found that receiving cells respond to pressure on their membranes by stiffening their skeletons to prevent movement away from the attacking cell. This process allows for close proximity of cell membranes, enabling fusion to occur.
Researchers identify how calcium regulates heart muscle and motors interact with each other, potentially leading to new tools for treating sudden cardiac arrest. This breakthrough discovery provides insight into the genetic condition hypertrophic cardiomyopathy, a leading cause of sudden cardiac arrest in young athletes.
A team led by Dr. Edward Debold is using a single molecule laser trap assay to directly observe muscle fatigue at the molecular level. They aim to understand how metabolites disrupt muscle contraction and develop new drug therapies to enhance function under fatigue-like conditions.
Researchers at Penn have developed a dynamic model of tissue failure that takes into account the complex feedback effects of cells' molecular motors. The study reveals how myosin activity contributes to tissue instability and provides insights for designing more accurate models to predict tissue behavior.
A study from the University of Pennsylvania has uncovered a mechanism that allows blood stem cells to divide in perpetuity, using the motor protein myosin II. The researchers found that asymmetric division is enabled by myosin IIB, which helps to partition key factors and keep one side as a stem cell.
San Diego State University researcher Sandy Bernstein receives $3.5m NIH grant to model human muscle diseases in fruit flies. His team uses genetically altered flies with engineered myosin protein mutations to better understand the effects on human health.