An international team of scientists has taken the next step in creating nanoscale machines by designing a multi-component molecular motor that can be moved clockwise and counterclockwise. Although researchers can rotate or switch individual molecules on and off, the new study is the first to create a stand-alone molecular motor that has multiple parts, said Saw-Wai Hla, an Ohio University professor of physics and astronomy who led the study with Christian Joachim of A*Star in Singapore and CEMES/CNRS in France and Gwenael Rapenne of CEMES/CNRS.
The rise of antibiotic-resistant bacteria has initiated a quest for alternatives to conventional antibiotics. One potential alternative is PlyC, a potent enzyme that kills the bacteria that causes strep throat and streptococcal toxic shock syndrome. PlyC operates by locking onto the surface of a bacteria cell and chewing a hole in the cell wall large enough for the bacteria’s inner membrane to protrude from the cell, ultimately causing the cell to burst and die.
Scientists are reporting development of chemical modules that can reproduce, on an “unprecedented” molecular level, changes and interactions that occur in natural populations of plants and animals, including those of hunting and being hunted for food, conducting mutually beneficial relationships and competing for resources.
If you want to understand a novel, it helps to start from the beginning rather than trying to pick up the plot from somewhere in the middle. The same goes for analyzing a strand of DNA. The best way to make sense of it is to look at it head to tail.
How do viruses attach to cells? How do proteins interact and mediate infection? How do molecular machines organize themselves in healthy cells? How do they differ in diseased cells? These are the types of questions National Institutes of Health researchers ask in the recently established Living Lab for Structural Biology, questions they strive to answer through the most sophisticated of imaging techniques.
Animal cells behave like fluid-filled sponges in response to being mechanically deformed according to new research published today in Nature Materials.
High-speed atomic force microscopy (HS-AFM) is providing the means to produce dramatic footage of moving biomolecules, and scientists at Kanazawa University leading the field. This research is also described in the inaugural December issue of the Kanazawa University Research Bulletin: http://www.kanazawa-u.ac.jp/research_bulletin/index
An EPFL team has developed a technique for spying on the inner lives of cells. For the first time, scientists have used a near-infrared, light-sensitive biocompatible molecule to mark and observe the activity of proteins inside living cells.
Two professors from The University of Texas at Austin will be honored by President Barack Obama with the National Medal of Science. Allen Bard, in the College of Natural Sciences, and John Goodenough, in the Cockrell School of Engineering, are two of 12 eminent researchers who will receive the medal this year, bringing the university’s overall total to five since 1962.
EPFL scientists used microfluidics to observe the behavior of individual tuberculosis-like bacteria in the presence of antibiotics. Their observations call into question the prevailing theory of bacterial resistance, and they have proposed a new explanation for why some bacteria become resistant. The research is published January 4, 2013 in the journal Science.
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