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New constrained "molecular tongs" designed to dissociate HIV-1 protease dimer
Naïma Merabet1, Julien Dumond, Bruno Collinet
1Biocis, UMR-CNRS 8076, Faculté de Pharmacie, Université de Paris-Sud, 5 rue J. B. Clément, F-92296 Châtenay-Malabry Cedex, France.
Journal of Medicinal Chemistry
|November 30, 2004
Summary
New molecular tongs effectively inhibit HIV-1 protease dimerization by targeting its beta-sheet structure. Quinoline scaffolds and specific peptide sequences show promise in developing novel antiviral therapies.
Area of Science:
- Medicinal Chemistry
- Biochemistry
- Virology
Background:
- HIV-1 protease is essential for viral maturation.
- Protease dimerization is a key target for antiviral drug development.
- Previous molecular tongs showed potential but required optimization.
Purpose of the Study:
- To synthesize and evaluate novel molecular tongs for HIV-1 protease dimerization inhibition.
- To explore the impact of quinoline scaffolds and varied peptide sequences on inhibitory activity.
- To elucidate the mechanism of inhibition for these new compounds.
Main Methods:
- Synthesis of seventeen new molecular tongs with naphthalene and quinoline scaffolds and peptidic strands.
- Assay of compounds using the Zhang kinetic technique for HIV-1 protease inhibition.
- Mechanism elucidation via ANS binding and gel filtration studies.
Main Results:
- Eleven compounds demonstrated pure dimerization inhibition, many in the submicromolar range.
- Quinoline scaffolds were found to enhance dimerization inhibition compared to naphthalene.
- A specific peptide sequence (Thr-Leu-Asn-OMe) proved most effective, with a K(id) of 80 nM for compound 30.
- Experimental data support the dissociation of the HIV-1 protease dimeric form.
Conclusions:
- Novel molecular tongs, particularly those with quinoline scaffolds and optimized peptide sequences, are potent inhibitors of HIV-1 protease dimerization.
- These findings offer a promising strategy for developing new anti-HIV therapeutics by targeting protease self-association.