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Human APOBEC3F is another host factor that blocks human immunodeficiency virus type 1 replication.
Yong-Hui Zheng1, Dan Irwin, Takeshi Kurosu
1Departments of Medicine, Microbiology, and Immunology, University of California, San Francisco, 3rd and Parnassus Ave., San Francisco, CA 94143-0703, USA.
Journal of Virology
|May 14, 2004
Summary
The human APOBEC3F protein blocks HIV-1 replication by causing G to A hypermutations, similar to APOBEC3G. Viral Vif protein counteracts this host defense mechanism.
Area of Science:
- Virology
- Molecular Biology
- Immunology
Background:
- APOBEC3G is a host factor that inhibits retroviral replication.
- APOBEC3G induces G to A hypermutations in viral cDNA during reverse transcription.
Purpose of the Study:
- To identify novel host factors that restrict human immunodeficiency virus type 1 (HIV-1) replication.
- To investigate the role of APOBEC3F in HIV-1 replication and its mechanism of action.
Main Methods:
- Identification of APOBEC3F as a novel host factor.
- Analysis of APOBEC3F's effect on HIV-1 replication.
- Investigation of APOBEC3F-induced G to A hypermutations in HIV genomic DNA.
- Assessment of the role of the viral Vif protein in counteracting APOBEC3F activity.
Main Results:
- Human APOBEC3F was identified as a host factor that blocks HIV-1 replication.
- APOBEC3F induces G to A hypermutations in HIV genomic DNA, similar to APOBEC3G.
- The viral Vif protein was found to counteract the anti-HIV-1 activity of APOBEC3F.
Conclusions:
- APOBEC3F is a novel host factor that restricts HIV-1 replication.
- APOBEC family members may represent a general host defense mechanism against retroviruses and mobile genetic elements.
- The viral Vif protein plays a crucial role in overcoming APOBEC-mediated host restriction.