http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- On average, our cells encounter a very lethal form of DNA damage 10 times a day. Lucky for us, we have the capacity to repair each and every one of them. New research now reveals exactly how two well-known proteins are involved in the process, a finding that not only helps shed light on cancer but also on how our cells maintain the integrity of our genome. http://www.physorg.com/news177322691.html Medicine & Health Fri, 13 Nov 2009 08:50:02 EST news177322691 The X-ray was named the most important modern scientific achievement Wednesday in a poll conducted for Britain's Science Museum, beating Apollo spacecraft and DNA. http://www.physorg.com/news176545086.html Other Sciences Wed, 04 Nov 2009 08:19:04 EST news176545086 Researchers report that a single-stranded DNA-binding protein (SSB), once thought to be a static player among the many molecules that interact with DNA, actually moves back and forth along single-stranded DNA, gradually allowing other proteins to repair, recombine or replicate the strands. http://www.physorg.com/news175347555.html Chemistry Wed, 21 Oct 2009 12:40:17 EST news175347555 (PhysOrg.com) -- Scientists have deciphered the three-dimensional structure of the human genome, paving the way for new insights into genomic function and expanding our understanding of how cellular DNA folds at scales that dwarf the double helix. http://www.physorg.com/news174230568.html Medicine & Health Thu, 08 Oct 2009 14:23:56 EST news174230568 (PhysOrg.com) -- Using computer simulations, a team of University of Wisconsin-Madison researchers has identified some of the pathways through which single complementary strands of DNA interact and combine to form the double helix. http://www.physorg.com/news173979476.html Nanotechnology Mon, 05 Oct 2009 17:10:20 EST news173979476 (PhysOrg.com) -- New York University chemists have created three-dimensional DNA structures, a breakthrough bridging the molecular world to the world where we live. The work, reported in the latest issue of the journal Nature, also has a range of potential industrial and pharmaceutical applications, such as the creation of nanoelectronic components and the organization of drug receptor targets to enable illumination of their 3D structures. http://www.physorg.com/news171119747.html Chemistry Wed, 02 Sep 2009 15:00:01 EST news171119747 (PhysOrg.com) -- The body's nanomachines that read our genes don't run as smoothly as previously thought, according to a new study by University of California, Berkeley, scientists. http://www.physorg.com/news168182853.html Chemistry Thu, 30 Jul 2009 14:29:22 EST news168182853 By manipulating individual atoms in DNA and forming unique molecules, a Georgia State University researcher hopes to open new avenues in research towards better understanding the mechanisms of DNA replication and transcription, and perhaps leading to new treatments for diseases. http://www.physorg.com/news167058036.html Chemistry Fri, 17 Jul 2009 14:03:03 EST news167058036 Researchers at Washington University School of Medicine in St. Louis have shed new light on a process that fixes breaks in the genetic material of the body's cells. Their findings could lead to ways of enhancing chemotherapy drugs that destroy cancer cells by damaging their DNA. http://www.physorg.com/news166986735.html Biology Thu, 16 Jul 2009 18:40:01 EST news166986735 An iconic photograph (http://img.timeinc.net/time/80days/images/530228.jpg) of Nobel laureates Drs. Francis Crick and James Watson show the pair discussing with a rigid model of the famous double helix. http://www.physorg.com/news166717469.html Biology Mon, 13 Jul 2009 15:25:05 EST news166717469 (PhysOrg.com) -- Accuracy is essential for life, so in converting the information stored in DNA into a form in which it can be used, a high level of precision is required. Dr Tanniemola Liverpool from the Department of Mathematics, working with colleagues from the University of Leeds, has developed a mathematical model for how the required accuracy is achieved. http://www.physorg.com/news164988266.html Physics Tue, 23 Jun 2009 15:05:01 EST news164988266 The relationship between the dental disease periodontitis and coronary heart disease (CHD) has been known for several years. Although a genetic link seemed likely, until now its existence was uncertain. Now, for the first time, scientists have discovered a genetic relationship between the two conditions, a researcher told the annual conference of the European Society of Human Genetics today. http://www.physorg.com/news162463930.html Medicine & Health Mon, 25 May 2009 09:52:42 EST news162463930 Scientists at The University of Manchester have developed an experiment that sheds new and fascinating light on how life on Earth might have begun. http://www.physorg.com/news161456485.html Chemistry Wed, 13 May 2009 18:02:05 EST news161456485 Anyone who studied a little genetics in high school has heard of adenine, thymine, guanine and cytosine - the A,T,G and C that make up the DNA code. But those are not the whole story. The rise of epigenetics in the past decade has drawn attention to a fifth nucleotide, 5-methylcytosine (5-mC), that sometimes replaces cytosine in the famous DNA double helix to regulate which genes are expressed. And now there's a sixth. In experiments to be published online Thursday by Science, researchers reveal an additional character in the mammalian DNA code, opening an entirely new front in epigenetic research. http://www.physorg.com/news159111225.html Biology Thu, 16 Apr 2009 14:34:19 EST news159111225 The DNA in the 23 pairs of chromosomes in each of the billions of cells of the human body is so tightly packed that it would measure six feet in length if stretched end to end. A genome of this size can squeeze into a cell's tiny nucleus because it is compressed into highly condensed chromatin fibers by proteins called histones. http://www.physorg.com/news158512212.html Biology Thu, 09 Apr 2009 16:11:16 EST news158512212 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. http://www.physorg.com/news157901839.html Chemistry Thu, 02 Apr 2009 14:38:40 EST news157901839 Researchers at UCLA's Jonsson Comprehensive Cancer Center have developed an assay that may be used to help identify new genes that can predict a predisposition to cancer. http://www.physorg.com/news157201748.html Medicine & Health Wed, 25 Mar 2009 12:09:53 EST news157201748 (PhysOrg.com) -- CSIRO's Double Helix Science Club has produced a paper model of the International Space Station (ISS) - the first designed just for children. http://www.physorg.com/news155316262.html Space & Earth Tue, 03 Mar 2009 15:25:04 EST news155316262 (PhysOrg.com) -- Anyone who has ever battled a stuck zipper knows it's a good idea to see what's stuck, where and how badly -- and then to pull hard. A Cornell research team's experiments involve the "unzipping" of single DNA molecules. By mapping the hiccups, stoppages and forces along the way, they have gained new insight into how genes are packed and expressed within cells. http://www.physorg.com/news152382840.html Biology Wed, 28 Jan 2009 16:34:20 EST news152382840 Researchers have long known that some repetitive DNA sequences can make human chromosomes "fragile," i.e. appearing constricted or even broken during cell divisions. Scientists at Tufts University have found that one such DNA repeat not only stalls the cell's replication process but also thwarts the cell's capacity to repair and restart it. The researchers focused on this CGG repeat because it is associated with hereditary neurological disorders such as fragile X syndrome and FRAXE mental impairment. http://www.physorg.com/news150905205.html Biology Sun, 11 Jan 2009 14:06:45 EST news150905205