Cell complexity: control of RNA (Introduction)

by David Turell , Monday, January 19, 2015, 14:30 (3597 days ago) @ David Turell

Cell complexity just developed by chance:-"Each cell is a busy warehouse of activity. To keep things orderly, protein workers are "assigned" to specific areas of the cell where other workers are collaborating on the same project. Most of the project areas, or organelles, in the cell are cordoned off by flexible membranes that let things in and out on an as-needed basis, but some organelles, like RNA granules, do not seem to have clear boundaries.-"RNA granules float throughout the watery space inside the cell and are responsible for transporting, storing and controlling RNA—DNA's chemical cousin—which holds blueprints for proteins. Until now, researchers thought that the granules didn't have concrete edges to separate them from the space outside.-"Before, the thinking was that RNA granules were like oil in water," says Geraldine Seydoux, Ph.D., a Howard Hughes investigator and professor of molecular biology and genetics at the Johns Hopkins University School of Medicine. "Oil molecules create droplets because they are attracted to themselves, and so they are able to separate from surrounding water. Now we know that the separation of RNA granules from their watery surroundings is facilitated by a dynamic envelope that stabilizes them.""-
 Read more at: http://phys.org/news/2015-01-cells_1.html#jCp