The Virus-Host Interplay: Biogenesis of +RNA Replication Complexes

Area of Science:

• Virology
• Molecular Biology
• Cell Biology

Background:

• Positive-strand RNA (+RNA) viruses are significant human and animal pathogens with limited treatment options.
• These viruses rely on host factors due to their limited coding capacity.
• A hallmark of +RNA virus infection is the dramatic modification of cellular membranes into viral replication complexes (VRCs).

Purpose of the Study:

• To review and summarize current knowledge on host factors involved in +RNA virus VRC biogenesis and stabilization.
• To highlight the critical roles these host factors play in viral replication and propagation.

Main Methods:

• Literature review of existing research on +RNA viruses and host-pathogen interactions.
• Analysis of studies identifying and characterizing host factors essential for VRC formation.
• Synthesis of information on the functions of these host factors in viral genome replication and virion assembly.

Main Results:

• +RNA viruses extensively remodel host cell membranes to create VRCs.
• VRCs concentrate viral and host factors, enhancing replication efficiency.
• VRCs protect the viral genome from host antiviral defenses.
• Numerous host factors are recruited or implicated in VRC biogenesis and stabilization.

Conclusions:

• Host factors are indispensable for the formation and function of +RNA virus VRCs.
• Understanding these host-virus interactions is key to developing novel antiviral strategies.
• Targeting host factors involved in VRCs presents a promising therapeutic avenue against +RNA viral infections.