First Cyclic Version of Temporin L Antimicrobial Peptide Designed With Enhanced Helical Structure
The first cyclic temporin L analogues were designed using diverse tethering strategies, establishing structure-activity relationships between α-helical content and antimicrobial, antibiofilm, and cytotoxic properties.
Quick Facts
What This Study Found
First-in-class cyclic temporin L analogues were created using lactam, triazole, hydrocarbon, and disulfide linkers. The library revealed relationships between α-helical content and antimicrobial, antibiofilm, and cytotoxic activities.
Key Numbers
3 cyclization strategies; increased α-helicity; retained broad antimicrobial activity; first cyclic temporin reported.
How They Did This
Peptide design and synthesis with four cyclization strategies. Structural characterization for α-helicity. Antimicrobial activity testing. Antibiofilm assays. Cytotoxicity evaluation. Structure-activity relationship analysis.
Why This Research Matters
Antimicrobial resistance demands new antibiotics. Cyclization solves the stability problem of natural antimicrobial peptides while the systematic structure-activity analysis provides a blueprint for optimizing future AMP candidates.
The Bigger Picture
The transition from linear to cyclic antimicrobial peptides represents a critical step toward clinical viability. Understanding how different cyclization methods affect both structure and function enables rational drug design in the growing field of peptide antibiotics.
What This Study Doesn't Tell Us
In vitro study — in vivo stability, pharmacokinetics, and therapeutic efficacy not assessed. Cyclization may alter selectivity between bacterial and human cell membranes. Manufacturing complexity increases with cyclization.
Questions This Raises
- ?Which cyclization strategy provides the best balance of antimicrobial potency and safety?
- ?How do cyclic temporin L analogues perform in animal infection models?
- ?Can this systematic cyclization approach be applied to other antimicrobial peptide families?
Trust & Context
- Key Stat:
- First-in-class cyclic temporin L analogues created using four different intramolecular tethering strategies
- Evidence Grade:
- Thorough in vitro characterization with structure-activity analysis across multiple cyclization approaches. Foundational chemistry work requiring in vivo validation.
- Study Age:
- Published in 2021. Cyclization of antimicrobial peptides continues as an active strategy for improving peptide drug properties.
- Original Title:
- First-in-Class Cyclic Temporin L Analogue: Design, Synthesis, and Antimicrobial Assessment.
- Published In:
- Journal of medicinal chemistry, 64(15), 11675-11694 (2021)
- Authors:
- Bellavita, Rosa(3), Casciaro, Bruno, Di Maro, Salvatore, Brancaccio, Diego, Carotenuto, Alfonso, Falanga, Annarita, Cappiello, Floriana, Buommino, Elisabetta, Galdiero, Stefania, Novellino, Ettore, Grossmann, Tom N, Mangoni, Maria Luisa, Merlino, Francesco, Grieco, Paolo
- Database ID:
- RPEP-05276
Evidence Hierarchy
Frequently Asked Questions
What is temporin L?
Temporin L is a natural antimicrobial peptide found in frog skin secretions. It has broad-spectrum activity against bacteria and biofilms but breaks down too quickly for clinical use.
Why make peptides cyclic?
Connecting the ends or sides of a peptide with chemical bridges (cyclization) locks it into its active shape and protects it from enzymes that would otherwise break it down. This can dramatically improve stability and potency.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-05276APA
Bellavita, Rosa; Casciaro, Bruno; Di Maro, Salvatore; Brancaccio, Diego; Carotenuto, Alfonso; Falanga, Annarita; Cappiello, Floriana; Buommino, Elisabetta; Galdiero, Stefania; Novellino, Ettore; Grossmann, Tom N; Mangoni, Maria Luisa; Merlino, Francesco; Grieco, Paolo. (2021). First-in-Class Cyclic Temporin L Analogue: Design, Synthesis, and Antimicrobial Assessment.. Journal of medicinal chemistry, 64(15), 11675-11694. https://doi.org/10.1021/acs.jmedchem.1c01033
MLA
Bellavita, Rosa, et al. "First-in-Class Cyclic Temporin L Analogue: Design, Synthesis, and Antimicrobial Assessment.." Journal of medicinal chemistry, 2021. https://doi.org/10.1021/acs.jmedchem.1c01033
RethinkPeptides
RethinkPeptides Research Database. "First-in-Class Cyclic Temporin L Analogue: Design, Synthesis..." RPEP-05276. Retrieved from https://rethinkpeptides.com/research/bellavita-2021-firstinclass-cyclic-temporin-l
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.