Targeting Picornavirus Nonstructural 2C Protein: Structure, Function, and Antiviral Discovery

Area of Science:

• Virology
• Structural Biology
• Drug Discovery

Background:

• Picornaviruses cause significant human and animal diseases.
• Effective direct-acting antiviral therapies are limited.
• The conserved nonstructural protein 2C plays crucial roles in viral replication.

Purpose of the Study:

• To review the domain architecture and structural biology of picornavirus protein 2C.
• To summarize the experimentally supported roles of 2C in the viral lifecycle.
• To discuss current inhibitors, resistance mutations, and antiviral design strategies targeting 2C.

Main Methods:

• Literature review of structural biology and virology studies.
• Analysis of protein domain architecture and functional activities.
• Comparison of existing antiviral inhibitors and resistance mechanisms.

Main Results:

• Protein 2C possesses ATPase and helicase-like activities.
• Key domains include the N-terminal membrane-binding region, ATPase core, and C-terminal helical domain.
• 2C is implicated in membrane remodeling, RNA replication, and virus-host interactions.

Conclusions:

• Protein 2C is a conserved and essential component of the picornavirus replication machinery.
• Its multifaceted roles and structural features present a promising, yet underexploited, target for antiviral drug development.
• Targeting 2C offers a viable strategy for combating medically important picornaviruses.