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Synthesis of Protein Bioconjugates via Cysteine-maleimide Chemistry
Published on: July 20, 2016
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A reactive peptide interface for site-selective cysteine bioconjugation
Suan Tuang1, Diomedes Dieppa-Matos, Chi Zhang
1Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
Chemical Communications (Cambridge, England)
|March 1, 2021
Summary
This study introduces a rapid, catalyst-free method for site-selective protein modification using a nine-residue peptide interface. This cysteine-based approach achieves near-quantitative antibody labeling in cell lysate.
Area of Science:
- Biochemistry
- Chemical Biology
- Proteomics
Background:
- Site-selective protein modification is crucial for biochemical and biomedical applications.
- Existing methods often require catalysts, harsh conditions, or lack efficiency.
Purpose of the Study:
- To develop a novel, efficient, and catalyst-free method for site-selective protein modification in aqueous conditions.
- To demonstrate the utility of a reactive peptide interface for protein labeling.
Main Methods:
- A nine-residue peptide interface was designed for reactive and site-selective protein modification.
- The method utilizes a cysteine-based reaction mechanism.
- Protein labeling was performed in aqueous buffer and cell lysate.
Main Results:
- The developed peptide interface demonstrated the fastest reported catalyst-free, cysteine-based protein modification to date (152 M-1 s-1).
- Near-quantitative labeling of antibodies was achieved in cell lysate.
- The method operates under mild, aqueous conditions.
Conclusions:
- The novel peptide interface provides a highly efficient and versatile tool for site-selective protein modification.
- This method offers a significant advancement for antibody labeling and other proteomic applications.
