Harnessing viral internal proteins to combat flu and beyond

Area of Science:

• Virology
• Drug Discovery
• Structural Biology

Background:

• Viral genetic variability poses a significant challenge in developing effective antiviral therapies.
• Identifying conserved regions in viral proteins is crucial for developing broad-spectrum antivirals.
• Internal viral proteins are often essential for viral replication and are less immunogenic, making them attractive targets.

Purpose of the Study:

• To review strategies for identifying novel antiviral targets by combining viral protein sequence conservation with drug-binding potential.
• To highlight internal proteins of influenza A virus and other RNA viruses as potential therapeutic targets.
• To discuss recent advancements in structural and functional characterization and drug targeting of these proteins.

Main Methods:

• Analysis of viral protein sequence conservation across different strains and related viruses.
• In silico and in vitro screening for drug-binding potential to conserved viral protein regions.
• Review of existing literature on structural and functional studies of key viral proteins.

Main Results:

• Identification of conserved internal proteins in influenza A virus (Basic Polymerase 2, Nuclear Export Protein, Nucleoprotein) as promising antiviral targets.
• Discussion of potential inhibitors and recent drug discovery efforts targeting these proteins.
• Exploration of similar strategies for other RNA viruses including Hepatitis E, SARS-CoV-2, Dengue, and HIV-1.

Conclusions:

• Combining sequence conservation and drug-binding potential is a viable strategy for discovering novel antiviral targets.
• Internal viral proteins represent a rich source for developing new antiviral therapies with reduced resistance potential.
• This approach holds promise for combating a range of RNA viral infections beyond influenza.