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Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: June 30, 2013
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Structural insights into frog skin-derived cyclic peptides as selective matriptase inhibitors
Agata Gitlin-Domagalska1, Malihe Hassanzadeh2, Aleksandra Helbik-Maciejewska1
1Department of Molecular Biochemistry, University of Gdańsk, 80-309, Gdańsk, Poland.
European Journal of Medicinal Chemistry
|November 7, 2025
Summary
Researchers developed potent and selective matriptase inhibitors using cyclic peptides derived from HV-BBI. Compound 6 shows nanomolar potency and high selectivity, offering a promising therapeutic strategy for matriptase-related diseases.
Area of Science:
- Biochemistry
- Protease Inhibitor Development
- Medicinal Chemistry
Background:
- Matriptase, a type II transmembrane serine protease, is crucial for epithelial integrity and cancer progression.
- Developing selective matriptase inhibitors is challenging due to structural similarities with other proteases like TMPRSS6.
Purpose of the Study:
- To investigate HV-BBI-derived cyclic peptides for matriptase inhibitory activity and selectivity.
- To identify key structural features responsible for potent and selective matriptase inhibition.
Main Methods:
- Synthesis and screening of HV-BBI-derived cyclic peptides.
- Structure-activity relationship studies including alanine scanning and C-terminal modifications.
- Molecular dynamics simulations to elucidate binding interactions.
- In vitro cellular assays to assess activity and cytotoxicity.
Main Results:
- Compound 6, a 13-residue cyclic peptide, demonstrated nanomolar potency and 1000-fold selectivity for matriptase over TMPRSS6.
- The C-terminal amide was crucial for potency; replacement with a carboxylate significantly reduced activity.
- Residues Lys5, Ser6, Ile7, and Arg10 were identified as critical for matriptase binding.
- Compound 6 showed cellular activity without cytotoxicity.
Conclusions:
- HV-BBI-derived cyclic peptides represent a promising scaffold for developing highly selective matriptase inhibitors.
- Structural insights from this study can guide the rational design of future matriptase-targeted therapeutics.
- Compound 6 is a valuable lead compound for further preclinical development.
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