Epigenetic Marks Make the Long Distance Thing Look EasyFebruary 22, 2010Even with all the advanced communications at our fingertips today, long distance relationships rarely work out, but it appears epigenetic silencing is an exception. Epigenetic silencing can spread to neighboring genomic regions through long-range epigenetic silencing (LRES) in cancer cells. In LRES, large blocks of genomic regions (like on the order of megabases) get silenced. […]
Transcription Factors Stand Up to the Methylation MachineFebruary 18, 2010Sometimes the best defense is a good offense. That appears to be the case for transcription factors (TFs) that resist de novo DNA methylation by binding to their sites in CpG islands. Although this idea has been around for awhile, a team of German and American researchers led by Michael Rehli recently provided the first […]
CSI’s Newest Crime-Solving Tool: miRNAsFebruary 17, 2010The TV franchise CSI: Crime Scene Investigation makes it seem like analyzing biological samples in a criminal investigation is as simple as pushing a button on a fancy gizmo and having the results printed out within seconds. (Of course, they also solve complex mysteries in under an hour every week, so I guess you can’t […]
Nature and Nurture Walking the Same Path?February 11, 2010Ever notice how it gets more interesting when there’s more than just black or white, love or hate, good or evil? The real action seems to take place in the gray areas. It seems true for methylated alleles as well. A recent paper looking into genomic imprinting found new evidence that both genomic and environmental […]
Histone Mods Choose Alternative Splicing LifestyleFebruary 8, 2010We can’t say we were surprised to hear that histone mods lead an alternative lifestyle—not that there’s anything wrong with that. It’s been theoretically shown that nucleosomes and their histone marks are involved in splicing by crunching data from previous experiments. Now, scientists at NCI, the University of Toronto, and the University of Texas Health […]
Methylome Stays Fashionable Throughout DifferentiationFebruary 5, 2010Our fashion sense evolves as we do. Just as you may trade your flip-flops for a business suit as you climb the corporate ladder, DNA methylation changes its style in cells that become more committed. To size up these methylation changes during differentiation, researchers at the UCSD Department of Reproductive Medicine and GIS in Singapore […]
Self Service Transcription Lane Now Open for miRNAsFebruary 2, 2010Many retailers have opened up self-service checkout lanes lately, which are great for those customers with just a few items, or don’t want to get stuck behind the old couple who still pays with paper checks. According to a recent report, when it comes to transcription, at least some miRNAs might have the option to […]
In Evolution, Change Is the Only (Epigenetic) ConstantFebruary 1, 2010Most of us are thrown for a loop when conditions suddenly change, but some are better able to cope than others (we still haven’t gotten used to the new Facebook format). A recent PNAS paper by Johns Hopkins’ epi-gurus Andrew Feinberg and Rafael Irizarry makes the case that some of this adaptability stems from stochastic […]
Methylation Puts Nucleosomes in the Hot SeatFebruary 1, 2010It’s no fun to get put in the “hot seat”. Whether it’s your advisor ragging on you for not having enough data; or your sweetie reminding you that you forgot your anniversary. Again. In either case, you sink lower and lower into your chair, and your muscles tighten while you take what you have coming. […]
Et Tu, Methyl Group? Epigenetic Betrayal of NSD1February 1, 2010Sometimes your best friend can become your worst enemy. Take the case of the methyl group and the histone methyltransferase enzyme NSD1: The methyl is NSD1’s little buddy through countless histone methyltransferase reactions, when suddenly the backstabbing little –CH3 teams up with a DNA methyltransferase to silence NSD1 expression. This tale of intrigue was told […]