TMEM106A inhibits enveloped virus release from cell surface.

Area of Science:

• Virology
• Cell Biology
• Immunology

Background:

• Enveloped viruses are a significant threat to host organisms.
• Virion release from host cells is a crucial stage in the viral life cycle and a target for host defense.
• Understanding host factors that regulate viral release is key to developing antiviral strategies.

Purpose of the Study:

• To investigate the role of host factor TMEM106A in the release of enveloped viruses.
• To elucidate the mechanism by which TMEM106A inhibits viral particle release.
• To assess the antiviral potential of TMEM106A and its orthologs against various enveloped viruses.

Main Methods:

• Investigated the localization and function of TMEM106A in virus-producing cells.
• Analyzed the interaction between TMEM106A, virion particles, and the plasma membrane.
• Examined the effect of HIV-1 Env on TMEM106A antiviral activity.
• Tested TMEM106A orthologs for antiviral activity against multiple enveloped viruses.

Main Results:

• Host factor TMEM106A, a type II transmembrane protein, inhibits the release of enveloped viruses from the cell surface.
• TMEM106A localizes to the plasma membrane and gets incorporated into HIV-1 virions.
• Intermolecular interactions of TMEM106A's C-terminal domains trap virions to the cell surface.
• HIV-1 Env partially suppresses TMEM106A's antiviral activity by interfering with these interactions.
• TMEM106A orthologs exhibit potent antiviral activity against diverse enveloped viruses.

Conclusions:

• TMEM106A is an evolutionarily conserved antiviral factor that restricts enveloped virus release.
• The mechanism involves trapping virions to the cell surface via specific molecular interactions.
• TMEM106A represents a promising target for developing broad-spectrum antiviral therapies.