Scientists discover Spot 42 function in the galactose operon
Although the E. coli galactose operon is a staple of most biology textbooks, a new report in the July 1 issue of Genes & Development shows that our understanding of this common example of bacterial gene regulation is still evolving.
Dr. Poul Valentin-Hansen and colleagues at the University of Southern Denmark report that a small RNA, called Spot 42, functions by an antisense mechanism to differentially regulate gene expression in the galactose operon.
The E. coli galactose operon is a cluster of four contiguous genes that are expressed as a group and encode enzymes that regulate galactose sugar metabolism. Like all bacterial operons, the four gal genes (galE, T, K, and M) are transcribed into one polycistronic mRNA message. Interestingly though, although all four gal genes are translated from this one polycistronic message, the relative synthesis of the encoded enzymes differs depending upon metabolic conditions.
Heather Cosel | EurekAlert!
Biologists unravel another mystery of what makes DNA go 'loopy'
16.03.2018 | Emory Health Sciences
Scientists map the portal to the cell's nucleus
16.03.2018 | Rockefeller University
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.
Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...
16.03.2018 | Event News
13.03.2018 | Event News
08.03.2018 | Event News
16.03.2018 | Earth Sciences
16.03.2018 | Physics and Astronomy
16.03.2018 | Life Sciences