Tryptophan-Aspartic Acid-Containing Peptide Analog from Coronin 1 Inhibits Model Membrane Fusion and Enveloped Viral...

Area of Science:

• Biochemistry
• Virology
• Membrane Biophysics

Background:

• Enveloped viruses rely on membrane fusion for infection.
• Current antivirals often target specific viral proteins, leading to resistance.
• Developing broad-spectrum antivirals that target host factors or membrane properties is a key goal.

Purpose of the Study:

• To design and evaluate a novel peptide-based fusion inhibitor targeting membrane physical properties.
• To investigate the mechanism of action and efficacy of the peptide analog mGG-21.
• To assess the potential of mGG-21 as a broad-range antiviral agent.

Main Methods:

• Design of a tryptophan-aspartic acid (WD)-containing peptide analog, mGG-21, derived from coronin 1.
• Assay of fusion pore formation in model membranes with varying cholesterol content.
• Inhibition assays using Influenza and Chikungunya viruses in cellular models.

Main Results:

• mGG-21 demonstrated approximately 60% inhibition of fusion pore formation in model membranes.
• The peptide's inhibitory effect was independent of membrane cholesterol content.
• mGG-21 effectively inhibited Influenza and Chikungunya virus infections in cell culture without toxicity.

Conclusions:

• WD-containing peptides, like mGG-21, represent a promising strategy for developing broad-spectrum viral fusion inhibitors.
• Modulating membrane physical properties offers an alternative approach to targeting viral proteins.
• mGG-21 shows potential as a lead compound for next-generation antiviral therapies.