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Morphogenesis of human immunodeficiency virus type 1
S Chatterjee1, S Basak, N C Khan
1Department of Pediatrics, University of Alabama, Birmingham 35294.
Summary
This study details Human Immunodeficiency Virus type 1 (HIV-1) particle assembly. It explores key events and factors influencing HIV-1 morphogenesis and the viral life cycle.
Area of Science:
- Virology
- Molecular Biology
Background:
- Human Immunodeficiency Virus type 1 (HIV-1), a Lentivirus, causes Acquired Immunodeficiency Syndrome.
- HIV-1 possesses gag, pol, and env genes encoding essential viral proteins.
- Viral proteins include core proteins (p17, p24, p15), nucleic-acid-binding proteins (p7, p9), and envelope glycoproteins (gp120, gp41).
Purpose of the Study:
- To describe critical events in HIV-1 morphogenesis.
- To identify factors influencing HIV-1 particle assembly and budding.
Main Methods:
- Analysis of retroviral assembly mechanisms.
- Review of protein precursor processing and interactions.
Main Results:
- Core proteins (p17, p24, p15) derive from the gag precursor (p55).
- Nucleic-acid-binding proteins (p7, p9) are synthesized from p15, crucial for ribonucleoprotein-core formation.
- Envelope glycoproteins (gp120, gp41) are cleaved from the gp160 precursor.
- HIV-1 assembly involves env precursor (gp160) association with gag proteins.
Conclusions:
- HIV-1 morphogenesis is a complex process involving specific protein processing and interactions.
- Various factors significantly influence the assembly and budding stages of the HIV-1 life cycle.