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Tag: "motors" at biology news

DNA Recombination and Repair—A New Twist to RecA Function

Molecular motors harness the energy of ATP (or GTP, a related energ...m it into mechanical force. Well-known examples of motors include myosin and dynein, proteins that use ATP to ferry intracellular cargo along fibers made of a...

X-Ray Beams And Fruit Fly 'Flight Simulator' Aid Scientists' View Of Muscle Power

...s Argonne National Laboratory, a cardiac molecular motors expert from the University of Vermont (UVM) and co... suggest a model for how these powerful biological motors turn “on?and “off?during the wingbeat. “Small flying insects face an enormous task ?generating enou...

Molecular Motors Cooperate In Moving Cellular Cargo, Study Shows

...have shed light on the tiny movements of molecular motors that shuttle material within living cells. The motors cooperate in a delicate choreography of steps, rather than engaging in the brute-force tug of war ma...

Motor transport in bio-nano systems

Molecular motors are nanoscale engines which move along very thin r...c of molecular cargo within biological cells. Both motors and filaments can be isolated from the cells and used to construct biomimetic transport systems. In ...

Spiders help scientists discover how muscles relax

...ructure and arrangement of the miniature molecular motors that control movement. Their work, which takes adv...ave solved the structure of the array of miniature motors that form our muscles and found out how they are switched off," said Raul Padron, a HHMI internation...

Scientists create digital bacteria to forge advances in biomedical research

... appendages that cells use for propulsion, and the motors to drive them. Emonet and his associates have designed their digital bacterial system in modules, so that additional components may be added later. "Right now it's a very simple model," Emonet said. "Basically the only thing those cells have is a s...

Marathon of nano-sprinters

...ine Publication, November 14-18, 2005). Molecular motors are nano-tractors for all kinds of cargo within th...onsidered the fuel of the cell. Kinesin and dynein motors move along microtubules and myosins move along actin filaments. The step sizes of these motors are o...

Nano springs eternal; Protozoan 'engine' posts nano records

...es. It also runs on a different fuel. Molecular motors that power muscle contraction, for example, use ATP molecules for energy. The spasmoneme runs on calcium, but its drive mechanism was poorly understood until France and colleagues got under the nano hood. Like van Leeuwenhoek, the researchers studied...

Are U.S. Flu Death Figures More PR Than Science?

...es. It also runs on a different fuel. Molecular motors that power muscle contraction, for example, use ATP molecules for energy. The spasmoneme runs on calcium, but its drive mechanism was poorly understood until France and colleagues got under the nano hood. Like van Leeuwenhoek, the researchers studied...

Similar Stem Cells In Insect And Human Gut

...es. It also runs on a different fuel. Molecular motors that power muscle contraction, for example, use ATP molecules for energy. The spasmoneme runs on calcium, but its drive mechanism was poorly understood until France and colleagues got under the nano hood. Like van Leeuwenhoek, the researchers studied...

Nano machine switches between biological and silicon worlds

...The team's switch works with a number of DNA-based motors and can achieve incredible performance. Specific sensors, which emit electrons, can tell if the biological motor is working, so the switch links the biological world with the silicon world of electronic signals. Here's how it works. The team uses a...

A new focus for the mechanism of nerve growth

...ntraction in heart and skeletal muscles. Myosin II motors are involved in functions such as directed cell movement, cell division and wound closure. While skeletal myosins have been studied in detail, non-muscle myosins are just beginning to be understood and this work identifies a new role for them. The ...

Movement of chromosome in nucleus visualized

...alized areas for different functions and molecular motors shuttling components around. Researchers from the University of Illinois' Chicago and Urbana-Champaign campuses now offer the first imaging evidence from live cells of ongoing organization and transport within the cell nucleus. Genes that are activ...

Polymer aids in blood clotting, pointing way to new treatment

...nisms has enabled scientists to detect muscle-like motors that operate a variety of movements within cells, said Arthur Kornberg, who won the 1959 Nobel Prize in Medicine or Physiology for discovering mechanisms in the synthesis of ribonucleic acid and deoxyribonucleic acid. "Roberto has discovered a novel...

A new way of looking at molecular motors

...p parasites enter and infect hosts. Defects in the motors play a role in a variety of human and animal disor...n myosins after they discovered that the molecular motors enabled toxoplasmosis and malaria parasites to force their way into human cells. The researchers s...

Restoring seagrass beds: Is it for the birds?

...assbed borders warning boaters against using their motors in the seagrasses. We'll also monitor the effects the bird droppings are having in the propeller scars in the shoalgrass beds. 'We hope a combination of educational signage, replanting sea oats, and a seemingly endless supply of fertilizer will b...

Adult stem cells are touchy-feely, need environmental clues

...cts. Each cell has its own skeleton and molecular motors that it uses as muscles. According to the researc...e cell to differentiate. "The cytoskeleton uses motors that, like our muscles, are based on the mechanical tension created by molecules of actin and myosin...

Discovery of agile molecular motors could aid in treating motor neuron diseases

...together, show proteins that function as molecular motors are surprisingly flexible and agile, able to navig...ientists are now finding that many other molecular motors are remarkably flexible in their behavior. In several further papers published in the Proceedings of...

Surprise finding for stretched DNA

... the dynamics, structure and kinetics of molecular motors and nucleo-protein assemblies. He holds joint appointments with Berkeley Lab's Physical Biosciences Division and UC Berkeley's Departments of Molecular & Cell Biology, Physics, and Chemistry. He is also a Howard Hughes Medical Institute (HHMI) in...

Biological motors sort molecules one by one on a chip

...tute of Nanoscience have discovered how to use the motors of biological cells in extremely small channels on a chip. Based on this, they built a transport system that uses electrical charges to direct the molecules individually. To demonstrate this, the Delft researchers sorted the individual molecules acco...

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