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Latest Molecular machine Stories

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2010-11-07 07:33:07

Rice University bioengineers measure pulling power of hitched pairs of protein motors A new study by Rice University bioengineers finds that the workhorse proteins that move cargo inside living cells behave like prima donnas. The protein, called kinesin, is a two-legged molecular machine. Rice's scientists invented tools that could measure the pulling power of kinesin both singly and in pairs, and they report this week in Biophysical Journal that kinesins don't work well together -- in...

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2010-09-13 19:29:27

UC Riverside chemists study quadrupedal molecular machines to provide an answerMolecular machines can be found everywhere in nature, for example, transporting proteins through cells and aiding metabolism. To develop artificial molecular machines, scientists need to understand the rules that govern mechanics at the molecular or nanometer scale (a nanometer is a billionth of a meter).To address this challenge, a research team at the University of California, Riverside studied a class of...

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2010-08-03 08:59:02

Scientists from the U.S. Department of Energy's Lawrence Berkeley National Laboratory have obtained the closest look yet of how a gargantuan molecular machine breaks down unwanted proteins in cells, a critical housekeeping chore that helps prevent diseases such as cancer. They pieced together the molecular-scale changes the machine undergoes as it springs into action, ready to snip apart a protein. Their work provides valuable clues as to how the molecular machine, a giant enzyme called...

2010-02-02 10:56:02

A group of Marshall University researchers and their colleagues in Japan are conducting research that may lead to new ways to move or position single molecules"”a necessary step if man someday hopes to build molecular machines or other devices capable of working at very small scales. Dr. Eric Blough, a member of the research team and an associate professor in Marshall University's Department of Biological Sciences, said his group has shown how bionanomotors can be used some day to move...

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2010-01-06 13:42:16

Scientists in Texas are reporting the development of a "nanodragster" that may speed the course toward development of a new generation of futuristic molecular machines. The vehicle "” only 1/50,000th the width of a human hair "” resembles a hot-rod in shape and can outperform previous nano-sized vehicles. Their report is in ACS' Organic Letters, a bi-weekly journal. James Tour, Kevin Kelly and colleagues note that the ability to control the motion of small molecules is essential...

2009-12-02 18:39:59

A new study reveals how molecular motors that power important subcellular movements can generate cyclical motion. The research, published by Cell Press in the December issue of the Biophysical Journal, opens a new door to understanding motor molecules by using a computer program that faithfully simulates movement of hair-like cellular projections. Many cells and single-celled organisms have tiny appendages called cilia and flagella that can wave or oscillate to move fluid across the cell...

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2009-08-14 10:00:00

Friction is the force that resists the relative motion of two bodies in contact. The same is true on the nanoscale: Molecular motors have to fight the friction created between them and their tracks. However, since the frictional forces acting on such motors had not been measured before, it was not known how they depend on the speed and the direction of motion.Friction Slows Down ProteinsScientists in Dresden at the Biotechnology Center (BIO-TEC) of the Technical University of Dresden and at...

2009-08-03 16:55:01

Our cells are controlled by billions of molecular "switches" and chemists at UC Santa Barbara have developed a theory that explains how these molecules work. Their findings may significantly help efforts to build biologically based sensors for the detection of chemicals ranging from drugs to explosives to disease markers.Their research is described in an article published this week in the Proceedings of the National Academy of Sciences (PNAS).Biosensors are artificial molecular switches that...

2009-06-15 10:42:47

Scientists from A*STAR's Institute of Materials Research and Engineering (IMRE), led by Professor Christian Joachim[1],  have scored a breakthrough in nanotechnology by becoming the first in the world to invent a molecular gear of the size of 1.2nm whose rotation can be deliberately controlled. This achievement marks a radical shift in the scientific progress of molecular machines and is published on 15 June 2009[2] in Nature Materials[3] , one of the most prestigious journals in...

2009-04-02 14:26:44

Chemists at New York University and Harvard University have created a bipedal, autonomous DNA "walker" that can mimic a cell's transportation system. The device, which marks a step toward more complex synthetic molecular motor systems, is described in the most recent issue of the journal Science. For a video demonstration of the walker, go to http://www.nyu.edu/public.affairs/videos/qtime/biped_movie.mov.Two fundamental components of life's building blocks are DNA, which encodes instructions...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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