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Evaluation of Substrate Ubiquitylation by E3 Ubiquitin-ligase in Mammalian Cell Lysates
Published on: May 10, 2022
E3Miner: a text mining tool for ubiquitin-protein ligases.
Hodong Lee1, Gwan-Su Yi, Jong C Park
1Department of Computer Science, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon, South Korea.
Nucleic Acids Research
|May 17, 2008
Summary
E3Miner is a new tool that extracts and organizes information on ubiquitin-protein ligases (E3s) from scientific literature and databases. This facilitates understanding of E3 functions, interactions, and disease relevance in ubiquitination pathways.
Area of Science:
- Biochemistry
- Molecular Biology
- Bioinformatics
Background:
- Ubiquitination regulates the degradation of over 80% of cellular proteins.
- Ubiquitin-protein ligases (E3s) are key enzymes in this process, with extensive research published.
- Existing text-mining tools and databases inadequately capture comprehensive E3-related knowledge.
Purpose of the Study:
- To develop E3Miner, a web-based text-mining tool for extracting and organizing E3-related information.
- To provide researchers with an easy way to access comprehensive knowledge on E3s from diverse sources.
- To support further investigation into E3 functions, interactions, and disease associations.
Main Methods:
- E3Miner analyzes abstracts to identify E3 protein names and their substrates.
- It extracts molecular features of E3s involved in ubiquitination pathways.
- The tool integrates data from protein databases on E3 functions, interactors, and associated human diseases.
Main Results:
- E3Miner successfully extracts and organizes comprehensive knowledge about E3s.
- It identifies E3s, their target substrates, and other ubiquitin-transferring proteins.
- The tool retrieves associated protein functions, interacting partners, and human diseases.
Conclusions:
- E3Miner enhances the accessibility and organization of E3-related biological information.
- It serves as a valuable resource for researchers studying ubiquitination and E3 ligases.
- The tool facilitates deeper understanding and further research in the field of E3 ubiquitination.
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Covalently 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.
The 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...
The 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...

