Virus and Host Mechanics Support Membrane Penetration and Cell Entry

Area of Science:

• Biophysics
• Virology
• Mechanobiology

Background:

• Viruses are inert particles that become active upon cell entry.
• Cell entry involves conformational changes triggered by host environment cues.
• These changes expose viral proteins essential for membrane interaction and genome release.

Purpose of the Study:

• To explore the role of physical properties in viral entry and uncoating.
• To investigate how viruses utilize host mechanical and chemical cues.
• To identify new therapeutic targets based on virus-host mechanics.

Main Methods:

• Analysis of viral physical properties (e.g., stiffness, pressure).
• Observation of virus-host interactions during cell entry.
• Investigating conformational changes in response to pH and mechanical stress.

Main Results:

• Virions actively tune their physical properties to facilitate cell penetration and genome uncoating.
• Influenza virus softens at low pH, aiding uncoating.
• Adenovirus stiffness and pressure regulate uncoating and membrane penetration.

Conclusions:

• Viral mechanics are crucial for successful infection.
• Virus-host mechanical interactions present novel targets for antiviral drug development.
• Manipulating physical properties could be a new antiviral strategy.