Related Experiment Video
Updated: Aug 5, 2026
11:54
Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
Published on: March 23, 2020
Computational Pipelines for Protein Ubiquitylation Analysis and Prediction
Anastasiya Potapenko1, Lyndal Henden1, Ghasem Azemi2
1Motor Neuron Disease Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW, Australia.
Methods in Molecular Biology (Clifton, N.J.)
|August 1, 2026
Summary
Computational tools aid in predicting ubiquitylation sites and analyzing ubiquitylated proteins. This summary guides researchers on using these tools for in silico prediction and mass spectrometry data analysis, enhancing efficiency in studying this vital posttranslational modification.
Area of Science:
- Biochemistry
- Molecular Biology
- Bioinformatics
Background:
- Ubiquitylation is a critical posttranslational modification regulating cellular processes.
- Dysregulation of ubiquitylation is implicated in various diseases.
- Mass spectrometry is a key technique for identifying ubiquitylated proteins and sites.
Purpose of the Study:
- To summarize computational tools for predicting ubiquitylation in silico.
- To outline methods for enriching ubiquitylation in samples for mass spectrometry.
- To provide practical guidance for researchers on computational and experimental approaches.
Main Methods:
- Review of existing computational tools for ubiquitylation site prediction.
- Description of sample enrichment strategies for mass spectrometry.
- Step-by-step protocol for in silico ubiquitylation site prediction.
- Computational approach for identifying ubiquitin branch sites from mass spectrometry data.
Main Results:
- Availability of diverse computational tools for in silico ubiquitylation analysis.
- Established protocols for sample preparation to enhance ubiquitylation detection.
- A practical guide for molecular biologists to predict ubiquitylation sites.
- A method to identify average ubiquitin branch sites from experimental data.
Conclusions:
- Computational tools significantly improve the efficiency and scope of ubiquitylation analysis.
- Integration of computational predictions and mass spectrometry enhances understanding of ubiquitylation.
- This work empowers researchers to better investigate ubiquitylation in health and disease.
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...
02:04Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...