Cysteinyl Radicals: A Versatile Chemistry Tool for Peptide Synthesis and Natural Biology
Review of cysteinyl radical chemistry covering their roles in both chemical peptide synthesis (enabling new stapling and modification strategies) and natural biological processes including enzyme catalysis.
Quick Facts
What This Study Found
Cysteinyl radicals enable novel peptide synthesis strategies including stapling and selective modifications, while also playing important roles in natural enzyme catalysis and redox biology.
Key Numbers
Synthetic uses: lipidation, glycosylation, labeling, macrocyclization, stapling, desulfurization; biological: DNA repair, metabolism, photochemistry
How They Did This
Narrative review of cysteinyl radical chemistry in both synthetic and biological contexts.
Why This Research Matters
New chemical reactions using cysteinyl radicals expand the toolkit for making peptide drugs, enabling modifications that are impossible with conventional chemistry.
The Bigger Picture
Radical chemistry is expanding the boundaries of what can be done with peptide molecules, enabling modifications that create more stable, active, and selective peptide drugs.
What This Study Doesn't Tell Us
Chemistry review. Radical reactions can be challenging to control. Scale-up for pharmaceutical manufacturing needs development. Selectivity may vary between peptide substrates.
Questions This Raises
- ?Can radical-based peptide modifications be scaled for drug manufacturing?
- ?Which peptide drug targets benefit most from radical chemistry approaches?
- ?Do radical-modified peptides show improved stability or activity?
Trust & Context
- Key Stat:
- Radical new chemistry Cysteinyl radicals enable peptide modifications impossible with conventional chemistry — expanding what's achievable in peptide drug design
- Evidence Grade:
- Not applicable (chemistry review).
- Study Age:
- Published 2021. Radical peptide chemistry continues advancing.
- Original Title:
- Cysteinyl radicals in chemical synthesis and in nature.
- Published In:
- Chemical Society reviews, 50(19), 10857-10894 (2021)
- Database ID:
- RPEP-05593
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
What are cysteinyl radicals?
Cysteine amino acids contain sulfur, which can form highly reactive radical species under certain conditions. These radicals enable unique chemical reactions that modify peptides in ways conventional chemistry cannot — creating new bonds, structures, and properties.
How does this help drug development?
Radical chemistry opens new ways to make peptide drugs more stable, selective, and potent. For example, cysteinyl radicals can create new types of staples that lock peptides into their active shape, or attach drug molecules at positions conventional chemistry can't reach.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-05593APA
McLean, Joshua T; Benny, Alby; Nolan, Mark D; Swinand, Glenna; Scanlan, Eoin M. (2021). Cysteinyl radicals in chemical synthesis and in nature.. Chemical Society reviews, 50(19), 10857-10894. https://doi.org/10.1039/d1cs00254f
MLA
McLean, Joshua T, et al. "Cysteinyl radicals in chemical synthesis and in nature.." Chemical Society reviews, 2021. https://doi.org/10.1039/d1cs00254f
RethinkPeptides
RethinkPeptides Research Database. "Cysteinyl radicals in chemical synthesis and in nature." RPEP-05593. Retrieved from https://rethinkpeptides.com/research/mclean-2021-cysteinyl-radicals-in-chemical
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.