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 Enduring cold temperatures alters fat cell epigenetics
19.04.2018 | University of Tokyo

nachricht Full of hot air and proud of it
18.04.2018 | University of Pittsburgh

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

Im Focus: Basel researchers succeed in cultivating cartilage from stem cells

Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.

Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...

Im Focus: Like a wedge in a hinge

Researchers lay groundwork to tailor drugs for new targets in cancer therapy

In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...

Im Focus: The Future of Ultrafast Solid-State Physics

In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.

Physicists can now control light in both time and space with hitherto unimagined precision. This is particularly true for the ability to generate ultrashort...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Diamond-like carbon is formed differently to what was believed -- machine learning enables development of new model

19.04.2018 | Materials Sciences

Electromagnetic wizardry: Wireless power transfer enhanced by backward signal

19.04.2018 | Physics and Astronomy

Ultrafast electron oscillation and dephasing monitored by attosecond light source

19.04.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>