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Native Chemical Ligation to Install Chemical Protein Modifications
Eldon R Hard1, Afraah Javed1, Matthew R Pratt2
1Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA.
Methods in Molecular Biology (Clifton, N.J.)
|August 1, 2026
Summary
Native chemical ligation enables the creation of homogenous full-length proteins with precise chemical modifications. This method is key for site-specific installation of challenging post-translational modifications.
Area of Science:
- Biochemistry
- Chemical Biology
- Molecular Biology
Background:
- Native chemical ligation (NCL) is a powerful technique for protein synthesis.
- It allows for the precise joining of peptide fragments.
- NCL is particularly useful for incorporating post-translational modifications that are difficult to introduce by other methods.
Purpose of the Study:
- To describe the application of native chemical ligation for assembling protein fragments.
- To highlight the utility of NCL for generating homogenous proteins with site-specific modifications.
- To discuss derivative ligation methods for increased flexibility in protein synthesis.
Main Methods:
- Assembly of recombinantly expressed and/or chemically synthesized protein fragments.
- Utilizing chemoselective bioconjugation reactions inherent to NCL.
- Exploring derivative ligation strategies for enhanced protein generation.
Main Results:
- Successful generation of homogenous full-length proteins.
- Site-specific installation of chemical modifications achieved.
- Demonstrated flexibility in protein assembly through NCL and its derivatives.
Conclusions:
- Native chemical ligation is a versatile and effective method for producing modified proteins.
- NCL provides a robust platform for site-specific installation of challenging post-translational modifications.
- Derivative ligation methods offer expanded possibilities for custom protein engineering.
Keywords:
Diselenide-selenoester ligation (DSL)Expressed protein ligation (EPL)Expressed protein selenoester ligation (EPSL)Maleimide protection/deprotectionNative chemical ligation (NCL)Post-translational modifications (PTMs)Protein semisynthesisMore Related Videos
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