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Updated: May 14, 2026
09:00
Detection of Protein Ubiquitination
Published on: August 19, 2009
[Bioinformatics advances in protein ubiquitination]
1Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China. pikaliang@163.com
Yi Chuan = Hereditas
|January 30, 2013
Summary
The ubiquitin-proteasome system (UPS) is crucial for protein degradation and cellular regulation. This review organizes bioinformatics studies on UPS data, focusing on network analysis and site prediction for better understanding.
Area of Science:
- Molecular Biology
- Biochemistry
- Bioinformatics
Context:
- The ubiquitin-proteasome system (UPS) governs cellular protein homeostasis, degrading 80-85% of eukaryotic proteins.
- UPS activity is ATP-dependent, efficient, and highly selective, impacting protein function and localization.
- Ubiquitination regulates critical cellular processes like cell cycle, apoptosis, transcription, DNA repair, and immune responses.
Purpose:
- To review and organize existing bioinformatics studies concerning the ubiquitin-proteasome system (UPS).
- To highlight methods for collecting UPS-related protein data and constructing/analyzing ubiquitination networks.
- To discuss the prediction of ubiquitination sites and motifs within UPS datasets.
Summary:
- This review consolidates bioinformatics approaches for analyzing large-scale UPS datasets.
- Key areas covered include data collection, network construction, and the prediction of ubiquitination sites and motifs.
- The study emphasizes the need for efficient data organization and analysis in UPS research.
Impact:
- Facilitates a structured understanding of complex UPS data for researchers.
- Provides insights into computational methods for studying protein ubiquitination.
- Identifies potential future research directions in UPS bioinformatics and network analysis.
Related Concept Videos
02:04Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
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...
01:26Protein Modifications in the RER
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...