Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UC Riverside Plant Cell Biologists Show that Plants Use Unique Mechanisms to Process and Degrade Proteins

06.06.2003


Natasha Raikhel, Distinguished Professor of Plant Cell Biology at UC Riverside, reports in the Proceedings of the National Academy of Sciences the mechanisms plants use to process and degrade proteins. (Photo credit: N. Raikhel.)


In plants, many proteins are degraded or activated within the vacuole, a large water and nutrient-filled vesicle found in plant cells that helps maintain the shape of plant cells and that stores food molecules. The manner by which this degradation or activation occurs, however, is uncertain.

In the June 10, 2003, issue of the Proceedings of the National Academy of Sciences (PNAS), however, scientists from UC Riverside identify a key protein, vacuolar processing enzyme or VPEg, in Arabidopsis thaliana (thale cress) that is required for this process.

"Plants that do not have VPEg fail to accumulate the active form of an important vacuolar enzyme and fail to degrade a variety of proteins that would not normally accumulate to high levels within vacuoles, particularly those of older tissues," said Natasha Raikhel, Distinguished Professor of Plant Cell Biology at UC Riverside and the principal investigator of the research project.



The findings, which would interest researchers studying changes that occur within plants during the aging process as well as those studying the role of vacuoles in plants, indicate that VPEg is likely involved in a variety processes that range from proper development during aging to stress and defense responses.

This is an important discovery because it demonstrates a previously unknown mechanism through which plants control protein composition of the vacuole. "Plants cannot live without vacuoles," explained Raikhel. "Since the vacuole plays such a central role in a wide variety of physiological processes, the VPEg pathway for protein processing and degradation may have a large impact on many of these processes."

The research, funded by the National Science Foundation, was performed from 2001-2003 in the UC Riverside Department of Botany and Plant Sciences and the Center for Plant Cell Biology (CEPCEB). Besides Raikhel, the co-authors of the PNAS paper are Enrique Rojo, Jan Zouhar, Clay Carter and Valentina Kovaleva, all of whom are researchers in Raikhel’s laboratory.

Iqbal Pittalwala | UC Riverside
Further information:
http://www.newsroom.ucr.edu/cgi-bin/display.cgi?id=607
http://www.cepceb.ucr.edu/
http://www.cnas.ucr.edu/

More articles from Life Sciences:

nachricht Biomarkers for identifying Tumor Aggressiveness
26.07.2017 | Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtz-Gemeinschaft

nachricht The dense vessel network regulates formation of thrombocytes in the bone marrow
25.07.2017 | Rudolf-Virchow-Zentrum für Experimentelle Biomedizin der Universität Würzburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Carbon Nanotubes Turn Electrical Current into Light-emitting Quasi-particles

Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers

Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...

Im Focus: Flexible proximity sensor creates smart surfaces

Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.

At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...

Im Focus: 3-D scanning with water

3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects

A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

NASA mission surfs through waves in space to understand space weather

25.07.2017 | Physics and Astronomy

Strength of tectonic plates may explain shape of the Tibetan Plateau, study finds

25.07.2017 | Earth Sciences

The dense vessel network regulates formation of thrombocytes in the bone marrow

25.07.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>