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Updated: Jan 19, 2026

Identification of Nucleolar Factors During HIV-1 Replication Through Rev Immunoprecipitation and Mass Spectrometry
Published on: June 26, 2019
Structural perspectives on HIV-1 Vif and APOBEC3 restriction factor interactions.
Farshad C Azimi1, Jeffrey E Lee1
1Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
Human immunodeficiency virus (HIV) uses the viral infectivity factor (Vif) protein to degrade APOBEC3 (A3) restriction factors, which normally inhibit viral replication. This review analyzes structural and biochemical data to understand Vif-A3 interactions.
Area of Science:
- Virology
- Structural Biology
- Immunology
Background:
- Human immunodeficiency virus (HIV) targets immune cells.
- APOBEC3 (A3) cytidine deaminases are intrinsic restriction factors that inhibit HIV replication.
- HIV's viral infectivity factor (Vif) protein targets A3 for degradation.
Purpose of the Study:
- To review and reanalyze experimental data on Vif-A3 interactions.
- To provide perspectives on residues involved in Vif-A3 protein-protein binding.
- To elucidate the structural basis of HIV's counteraction of host restriction factors.
Main Methods:
- Structural biology studies
- Biochemical assays
- Functional analyses
- Data reanalysis
Main Results:
- Vif targets A3 proteins for ubiquitination and proteasomal degradation.
- Vif recognizes and counteracts multiple A3 substrates.
- Key residues mediating Vif-A3 interactions are identified through structural and biochemical data.
Conclusions:
- Understanding Vif-A3 interactions is crucial for HIV-1 restriction factor evasion.
- Structural insights into the Vif-A3 complex are essential for developing antiviral strategies.
- This review consolidates current knowledge on Vif-A3 binding interfaces.
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