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Updated: Sep 11, 2025

Covalent Fragment Screening Using the Quantitative Irreversible Tethering Assay
Published on: February 28, 2025
Structure-based rational design of covalent probes.
Matthew Holcomb1, Manuel Llanos2, Althea Hansel-Harris2
1Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA. mattholc@scripps.edu.
Covalent probes are revolutionizing drug discovery. This review highlights how computational methods and structural data are key to designing effective covalent probes for biology and medicine.
Area of Science:
- Medicinal Chemistry
- Chemical Biology
- Structural Biology
Background:
- Covalent probes are increasingly vital in fundamental biology and drug design.
- Historically viewed as problematic, covalent interactions are now a key strategy in drug discovery.
- Unlike non-covalent probes, covalent probes present unique challenges for integrating structural data into the design process.
Purpose of the Study:
- To review the role of structure-based design in the discovery and optimization of covalent probes.
- To emphasize the application of computational methods for leveraging structural data in covalent probe development.
Main Methods:
- Literature review focusing on structure-based design principles.
- Analysis of computational techniques applicable to covalent probe design.
- Discussion of case studies illustrating the integration of structural and computational data.
Main Results:
- Structure-based design is crucial for advancing covalent probe discovery and optimization.
- Computational methods offer powerful tools for interpreting structural data of covalent probes.
- Effective use of structural information can overcome design challenges associated with covalent interactions.
Conclusions:
- Structure-based design, particularly with computational support, is essential for the successful development of covalent probes.
- Leveraging structural data enables the rational design of covalent probes with improved efficacy and safety profiles.
- This approach facilitates the transition of covalent probes from niche tools to mainstream drug discovery paradigms.
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