Interfering with hepatitis C virus assembly in vitro using affinity peptides directed towards core protein

Area of Science:

• Virology
• Molecular Biology
• Biochemistry

Background:

• Viral assembly is essential for virus replication.
• Hepatitis C virus (HCV) core protein is the sole structural protein interacting with viral RNA.
• An in vitro assay using recombinant core protein and RNA allows study of HCV assembly.

Purpose of the Study:

• To investigate the inhibition of HCV core protein self-assembly using peptides.
• To identify which peptides are most effective in inhibiting HCV assembly.

Main Methods:

• Used purified recombinant C170 core protein and structured RNA for in vitro assembly assays.
• Tested inhibition using peptides derived from HCV core, HCV NS5A, p21, and p73 proteins.

Main Results:

• Peptides derived from the HCV core protein demonstrated the strongest inhibition of self-assembly.
• These inhibitory core peptides originate from regions predicted to mediate core subunit interactions.
• A peptide from the C-terminal end of HCV NS5A protein showed moderate inhibition.

Conclusions:

• Regions within the HCV core protein are critical for viral assembly.
• Targeting core protein-protein interactions with specific peptides offers a potential strategy for inhibiting HCV assembly.