Adaptor Protein Complexes in HIV-1 Pathogenesis: Mechanisms and Therapeutic Potential

Area of Science:

• Cell Biology
• Virology
• Molecular Biology

Background:

• Adaptor protein (AP) complexes are crucial for endocytosis and intracellular vesicular transport.
• These AP complexes (AP1-5) regulate organelle homeostasis, protein turnover, and immune responses.
• Lentiviruses, including HIV-1, exploit AP complexes for immune evasion and infectious particle assembly.

Purpose of the Study:

• To elucidate the roles of AP complexes in HIV-1 pathogenesis.
• To explore the interactions between HIV-1 proteins and AP complexes.
• To identify therapeutic targets within these protein-AP complex interfaces.

Main Methods:

• The study reviews existing literature on AP complexes and their interactions with HIV-1 proteins.
• It analyzes the functions of HIV-1 Nef, Vpu, Env, and Gag in co-opting AP complexes.
• The research discusses the potential of targeting these molecular interfaces for antiviral development.

Main Results:

• HIV-1 Nef interacts with AP1 and AP2 to downregulate CD4 and MHC-I.
• HIV-1 Vpu utilizes AP1 and AP2 to modulate BST2 (Tetherin) and facilitate virion release.
• HIV-1 Env and Gag also interact with AP complexes (AP3 suggested for Gag) to influence viral assembly and cell surface expression.

Conclusions:

• Targeting the interfaces between HIV-1 proteins and AP complexes is a viable therapeutic strategy.
• Inhibiting these interactions could impair viral production and immune evasion.
• This approach holds promise for developing novel antivirals and advancing towards an HIV-1 cure.