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Abstract Transition‐metal catalysis provides new approaches to selectivity and the activation of otherwise inert functional groups. Bioconjugation with protein and peptide substrates presents numerous challenges of functional group activation and selectivity, and transitional‐metal approaches provide important alternative solutions to these challenges. This article describes the development of boronic acid reagents for new selective approaches to modification of peptides and proteins, focusing primarily on catalytic C−X bond formation.
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Bioinspired Nitroalkylation for Selective Protein Modification and Peptide Stapling
Abstract Nitroalkanes react specifically with aldehydes, providing rapid, stable, and chemoselective protein bioconjugation. These nitroalkylated proteins mimic key post‐translational modifications (PTMs) of proteins and can be used to understand the role of these PTMs in cellular processes. Demonstrated here is the substrate scope of this bioconjugation by attaching a variety of tags, such as NMR tags, fluorescent tags, affinity tags, and alkyne tags, to proteins. The structure and enzymatic activity of modified proteins remain conserved after labeling. Notably, the nitroalkane group leads to easy characterization of proteins by mass spectrometry because of its distinct fingerprint pattern. Importantly, the nitro‐alkylated peptides provide a new handle for site‐selective fluorination of peptides, thus installing a specific probe to study peptide–protein interactions by19F NMR spectroscopy. Furthermore, nitroalkane reagents can be used for the late‐stage diversification of peptides and for the synthesis of peptide staples.
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- Award ID(s):
- 1752654
- PAR ID:
- 10131064
- Publisher / Repository:
- Wiley Blackwell (John Wiley & Sons)
- Date Published:
- Journal Name:
- Angewandte Chemie International Edition
- Volume:
- 59
- Issue:
- 7
- ISSN:
- 1433-7851
- Format(s):
- Medium: X Size: p. 2793-2801
- Size(s):
- p. 2793-2801
- Sponsoring Org:
- National Science Foundation
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