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Updated: Dec 27, 2025
Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
Published on: March 23, 2020
Protein Engineering in the Ubiquitin System: Tools for Discovery and Beyond
Bo Zhao1, Yien Che Tsai2, Bo Jin2
1Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China (B.Z., B.J., B.W.); Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China (Y.W.); Laboratory of Protein Dynamics and Signaling, Center for Cancer Research, National Cancer Institute, Frederick, Maryland (Y.C.T., A.M.W.); and Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia (Y.W., H.Z., T.C., J.Y.) bozhao@sjtu.edu.cn.
Protein engineering advances the study of ubiquitination, a key cellular process. These new tools help map, probe, and manipulate ubiquitin transfer, offering insights into disease and potential therapies.
Area of Science:
- Biochemistry and Molecular Biology
- Cellular Signaling
- Protein Modification
Background:
- Ubiquitin (UB) transfer involves E1, E2, and E3 enzymes, regulating numerous biological processes.
- Deubiquitinating enzymes (DUBs) and ubiquitin-binding domains (UBDs) modulate UB modifications and signaling.
- Dysregulation of UB pathways is implicated in various diseases.
Purpose of the Study:
- To highlight recent advancements in protein engineering for studying UB transfer.
- To showcase how protein engineering aids in mapping, probing, and manipulating UB signaling.
- To underscore the potential of these tools for understanding disease and developing therapeutics.
Main Methods:
- Protein engineering approaches including unnatural amino acid incorporation.
- Protein semisynthesis via expressed protein ligation.
- High-throughput selection methods like phage and yeast cell surface display.
Main Results:
- Generation of designer proteins to interrogate ubiquitination.
- Application of protein engineering to map and probe UB transfer pathways.
- Demonstration of manipulating UB transfer in cellular contexts.
Conclusions:
- Protein engineering is revolutionizing the study of ubiquitination.
- New mechanistic insights are gained into UB chain assembly and signaling.
- These advancements hold promise for therapeutic interventions in diseases linked to UB pathway dysregulation.
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