Related Experiment Video
Updated: Jul 11, 2026
07:43
Assaying Proteasomal Degradation in a Cell-free System in Plants
Published on: March 26, 2014
Structure, function and regulation of plant proteasomes
1Plant Physiology, Biochemistry and Molecular Biology Program, Department of Plant and Soil Sciences, KTRDC, University of Kentucky, Lexington, KY 40546, USA.
Biochimie
|September 11, 2007
Summary
Plant proteasomes, crucial for protein degradation, also regulate gene expression and development through ubiquitin-dependent and -independent pathways. Their diverse roles are essential for plant growth and environmental responses.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- Proteasomes are essential eukaryotic complexes for protein degradation.
- Initially known for ubiquitin-dependent proteolysis, proteasomes have diverse functions.
- Their roles extend to ubiquitin-independent proteolysis, RNAse activity, and transcriptional regulation.
Purpose of the Study:
- To provide an overview of proteasome function and regulation in plants.
- To highlight the significance of proteasome-mediated protein degradation in plant development.
- To emphasize the role of proteasomes in plant responses to environmental stimuli.
Main Methods:
- Literature review of proteasome research in plants.
- Analysis of proteasome structure and conserved functions.
- Synthesis of current knowledge on proteasome regulation and roles.
Main Results:
- Proteasomes are vital for both cytosolic and nuclear protein turnover in plants.
- Plant proteasomes exhibit ubiquitin-dependent and -independent proteolytic activities.
- Non-proteolytic functions, including transcriptional regulation, are increasingly recognized.
Conclusions:
- Proteasome-dependent protein degradation is a key regulator of plant development.
- Proteasomes play critical roles in mediating plant responses to environmental cues.
- Understanding proteasome function is crucial for advancing plant science and agriculture.
Related Concept Videos
01:17The Proteasome Structure
The ubiquitin-proteasome pathway is a well-known mechanism utilized by eukaryotic cells to remove cytoplasmic proteins that are misfolded, damaged, or no longer needed. In this pathway, the protein that needs to be eliminated undergoes a process called ubiquitination, where a chain of ubiquitin molecules is attached to the 48th lysine residue of the target protein. This ubiquitin modification helps the proteasome distinguish between a target protein and a healthy protein.
The proteasome is an...
The proteasome is an...
02:18The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
01:13The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
02:18The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
02:58Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
02:58Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...