Reversible Dibromomaleimide Peptide Stapling: Fine-Tuning Helical Peptide Drug Design
Structural optimization of reversible dibromomaleimide stapling using native cysteine/homocysteine residues at i, i+4 positions enables tunable α-helical stabilization of peptides targeting protein-protein interactions.
Quick Facts
What This Study Found
Optimized reversible dibromomaleimide stapling of peptides using native Cys/homoCys at i, i+4 positions. Structural analysis revealed conformation-activity relationships for α-helical peptide stabilization targeting protein-protein interactions.
Key Numbers
i, i+4 spacing; Ac-X1AAAX5-NH2 model; optimal X1=L-Cys, X5=L-hCys
How They Did This
Medicinal chemistry study. Dibromomaleimide stapling of peptides with native cysteine residues. Structural characterization (NMR, CD). Binding affinity assessment. Reversibility demonstration.
Why This Research Matters
Reversible stapling adds a design dimension: peptides can be stabilized for delivery but potentially unstapled at the target site. This "smart stapling" concept could improve peptide drug efficacy and reduce off-target effects.
The Bigger Picture
Reversible covalent chemistry is a growing trend in drug design. Applying it to peptide stapling creates "smart" peptide drugs that can switch between stabilized and unstabilized conformations in response to biological conditions.
What This Study Doesn't Tell Us
Structural optimization study — therapeutic efficacy not tested. Reversibility conditions may not match biological requirements. Limited peptide sequences tested.
Questions This Raises
- ?Under what biological conditions does the staple reverse?
- ?Would reversible stapling improve or reduce in vivo peptide drug efficacy?
- ?Can this approach be applied to other stapling positions (i, i+7)?
Trust & Context
- Key Stat:
- Reversible stapling Unlike permanent hydrocarbon staples, dibromomaleimide stapling can be reversed — enabling peptides that stabilize for delivery but unstaple at the target
- Evidence Grade:
- Low evidence grade: structural optimization study without biological activity testing.
- Study Age:
- Published 2021. Reversible peptide modification chemistry continues advancing.
- Original Title:
- Structural optimization of reversible dibromomaleimide peptide stapling.
- Published In:
- Peptide science (Hoboken, N.J.), 113(1), e24157 (2021)
- Authors:
- Lindsey-Crosthwait, Ayanna, Rodriguez-Lema, Diana, Walko, Martin, Pask, Christopher M, Wilson, Andrew J
- Database ID:
- RPEP-05556
Evidence Hierarchy
Frequently Asked Questions
What is peptide stapling?
Peptide stapling is a chemical modification that locks a peptide into its active shape (usually a helix) using a molecular "bridge" or "staple." This makes the peptide more stable, better at binding its target, and more resistant to degradation.
Why would reversible stapling be useful?
Reversible stapling could create peptides that are stabilized during delivery (surviving in the bloodstream) but unstaple at the disease site, potentially exposing additional binding surfaces or enabling the peptide to adopt its natural flexible state for optimal target interaction.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-05556APA
Lindsey-Crosthwait, Ayanna; Rodriguez-Lema, Diana; Walko, Martin; Pask, Christopher M; Wilson, Andrew J. (2021). Structural optimization of reversible dibromomaleimide peptide stapling.. Peptide science (Hoboken, N.J.), 113(1), e24157. https://doi.org/10.1002/pep2.24157
MLA
Lindsey-Crosthwait, Ayanna, et al. "Structural optimization of reversible dibromomaleimide peptide stapling.." Peptide science (Hoboken, 2021. https://doi.org/10.1002/pep2.24157
RethinkPeptides
RethinkPeptides Research Database. "Structural optimization of reversible dibromomaleimide pepti..." RPEP-05556. Retrieved from https://rethinkpeptides.com/research/lindsey-crosthwait-2021-structural-optimization-of-reversible
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.