Navigation Links
Need for speed
Date:3/18/2012

Like any law-abiding train passenger, a molecule called oskar RNA carries a stamped ticket detailing its destination and form of transport, scientists at the European Molecular Biology Laboratory (EMBL) in Heidelberg, Germany, have found. They show that for this molecule, moving in the right direction isn't enough: speed is of the essence. Their study, published online today in Nature Structural & Molecular Biology, also provides clues as to how a single molecule could receive tickets for different destinations, depending on what type of cell it is in.

For a fruit fly embryo to develop properly, oskar RNA produced by the mother has to enter the egg cell, or oocyte, as it matures, and be taken to one of its ends the posterior pole. Researchers in Anne Ephrussi's group at EMBL have now found that this movement is more complicated than it seemed. When oskar is processed for transport by a mechanism called splicing, two different tags SOLE and EJC are attached to it, next to each other, at a specific spot. Ephrussi and colleagues found that both tags have to be in place for oskar to reach the right destination. Together, they seem to form a ticket that marks oskar for transport to the posterior pole, differentiating it from the many other RNAs that enter the oocyte bound for different destinations.

When they genetically altered the SOLE tag, the scientists found that oskar didn't go to the oocyte's posterior pole, as it should. But surprisingly, it did still move, and seemingly in the right direction. The problem, the researchers realised, was that oskar is racing towards a moving target. As the oocyte grows, it becomes longer, in effect taking the posterior pole further and further away as oskar is carried towards it. With a defective SOLE tag, oskar seemed unable to move fast enough to overcome the oocyte's growth. So somehow this 'ticket' affects the speed of transport, too.

Ephrussi and colleagues are now investigating how SOLE and EJC interact with each other, and how they might influence the cellular machinery that transports oskar. The scientists would also like to explore an interesting possibility raised by their current findings. They discovered that the SOLE tag is only formed if the RNA molecule is spliced. Since some RNAs can be spliced at different spots along their length, this means the same RNA could potentially be issued with tickets for different destinations for instance, in different cell types depending on which parts of it are spliced.


'/>"/>

Contact: Sonia Furtado Neves
sonia.furtado@embl.de
European Molecular Biology Laboratory
Source:Eurekalert  

Related biology news :

1. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
2. Grass to gas: UGA researchers genome map speeds biofuel development
3. New high-tech wound care products speed healing of ulcers, burns, injuries and surgical wounds
4. NJIT high speed rail expert to address DC conference next week
5. Evolution at warp speed: Hatcheries change salmon genetics after a single generation
6. UCF nanotechnology may speed up drug testing
7. Georgia Tech develops speedy software designed to improve drug development
8. Genome-scale network of rice genes to speed the development of biofuel crops
9. Super-sized muscle made twin-horned dinosaur a speedster
10. Speed limit on babies vision
11. Evolutionary kings of the hill use good, bad and ugly mutations to speed ahead of competition
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Need for speed
(Date:5/24/2016)... 24, 2016 Ampronix facilitates superior patient care by providing unparalleled technology to ... display is the latest premium product recently added to the range of products distributed ... ... ... Imaging- LCD Medical Display- Ampronix News ...
(Date:5/12/2016)... -- WearablesResearch.com , a brand of Troubadour Research ... the Q1 wave of its quarterly wearables survey. A ... to a program where they would receive discounts for ... "We were surprised to see that so ... , CEO of Troubadour Research, "primarily because there are ...
(Date:4/28/2016)... BANGALORE, India , April 28, 2016 /PRNewswire/ ... product subsidiary of Infosys (NYSE: INFY ), and ... global partnership that will provide end customers with ... banking and payment services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ... area for financial services, but it also plays a fundamental ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Liquid Biotech USA ... of a Sponsored Research Agreement with The University ... (CTCs) from cancer patients.  The funding will be ... correlate with clinical outcomes in cancer patients undergoing ... then be employed to support the design of ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of ... the Cary 5000 and the 6000i models are higher end machines that use the ... of the spectrophotometer’s light beam from the bottom of the cuvette holder. , ...
(Date:6/23/2016)...   Boston Biomedical , an industry leader ... target cancer stemness pathways, announced that its lead ... Designation from the U.S. Food and Drug Administration ... gastroesophageal junction (GEJ) cancer. Napabucasin is an orally ... stemness pathways by targeting STAT3, and is currently ...
(Date:6/23/2016)... ... 23, 2016 , ... Charm Sciences, Inc. is pleased to ... AOAC Research Institute approval 061601. , “This is another AOAC-RI approval of the ... Vice President of Regulatory and Industrial Affairs. “The Peel Plate methods perform comparably ...
Breaking Biology Technology: