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Updated: Jan 22, 2026
10:44
Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs
Published on: May 15, 2019
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A MedChem toolbox for cereblon-directed PROTACs
Christian Steinebach1, Izidor Sosič2, Stefanie Lindner3
1Pharmaceutical Institute , Pharmaceutical Chemistry I , University of Bonn , An der Immenburg 4 , 53121 Bonn , Germany .
Medchemcomm
|July 16, 2019
Summary
A new modular chemistry toolbox enables the creation of cereblon-targeted Proteolysis Targeting Chimeras (PROTACs). This system allows for diverse linker modifications to fine-tune PROTAC properties and expand their utility with various functional tags.
Area of Science:
- Medicinal Chemistry
- Chemical Biology
- Drug Discovery
Background:
- Proteolysis Targeting Chimeras (PROTACs) are an emerging therapeutic modality.
- Cereblon (CRBN) is a key E3 ubiquitin ligase utilized in PROTAC design.
- Development of versatile PROTAC building blocks is crucial for efficient drug discovery.
Purpose of the Study:
- To develop a modular chemistry toolbox for constructing cereblon-directed PROTACs.
- To explore the impact of linker modifications on PROTAC physicochemical properties.
- To facilitate the synthesis of novel heterobifunctional molecules for PROTAC applications.
Main Methods:
- Synthesis of a library of linkers attached to a CRBN ligand (pomalidomide).
- Modulation of linker constitution to alter physicochemical characteristics.
- Functionalization of linkers with diverse terminal groups (amines, carboxylic acids, alkynes, etc.).
Main Results:
- A versatile modular toolbox for PROTAC synthesis was successfully established.
- Linker modifications demonstrated potential for tuning PROTAC properties.
- The toolbox supports the incorporation of various functional tags (biotin, fluorescent, hydrophobic, peptide).
Conclusions:
- The developed toolbox provides medicinal chemists with enhanced capabilities for PROTAC design.
- This approach facilitates the creation of tailored PROTACs and heterobifunctional molecules.
- The modularity enables efficient exploration of chemical space for targeted protein degradation.
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