Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Key piece of puzzle sheds light on function of ribosomes

13.01.2010
When ribosomes produce protein in all living cells, they do so through a chemical reaction that happens so fast that scientists have been puzzled. Using large quantum mechanical calculations of the reaction center of the ribosome, researchers at Uppsala University in Sweden can now provide the first detailed picture of the reaction. The findings are published in the Web edition of Proceedings of the National Academy of Sciences, PNAS.

It was previously known how the chemical reaction goes about adding amino acids to the growing protein. Both computer simulations and x-ray crystallographic experiments have identified a hydrogen bonding network that appears to be the main explanation for the high speed of the reaction. What is especially remarkable is the presence of a couple of "trapped" water molecules seem to be the only parts of the ribosome that are in contact with the reacting chemical groups.

Doctoral candidate Göran Wallin and Professor Johan Åqvist at the Department of Cell and Molecular Biology at Uppsala University have carried out large-scale calculations of the ribosome reaction center, and this has enabled them to monitor the changes electronic structure during the reaction. With about a thousand quantum mechanical optimizations, they have succeeded in establishing exactly what the highest point of the energy surface looks like, the point that determines the speed of the reaction.

"Our calculations provide a detailed picture of the reaction and show that the two water molecules play a central role in ribosome catalysis. One of the molecules participates directly in the reaction by 'shuffling' protons around, while the other one helps increase the speed of the reaction," explains Johan Åqvist.

The findings surprisingly show that it is just a few components in the ribosome's reaction center that induce the catalytic effect, whereas the surrounding structure mainly holds them in place.

"An exciting question for future research is whether these components are a vestige of a primordial and much simpler ribosome," says Johan Åqvist.

Johan Åqvist | EurekAlert!
Further information:
http://www.uu.se

More articles from Life Sciences:

nachricht A novel socio-ecological approach helps identifying suitable wolf habitats
17.02.2017 | Universität Zürich

nachricht New, ultra-flexible probes form reliable, scar-free integration with the brain
16.02.2017 | University of Texas at Austin

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Switched-on DNA

20.02.2017 | Materials Sciences

Second cause of hidden hearing loss identified

20.02.2017 | Health and Medicine

Prospect for more effective treatment of nerve pain

20.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>