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Updated: Aug 2, 2025

Analysis of Group IV Viral SSHHPS Using In Vitro and In Silico Methods

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Published on: December 21, 2019

HIV-Induced CPSF6 Condensates.

Selen Ay¹, Francesca Di Nunzio¹

¹Advanced Molecular Virology Unit, Department of Virology, Institut Pasteur, Université Paris Cité, 75015 Paris, France.

Journal of Molecular Biology

|April 15, 2023

Summary

Human Immunodeficiency Virus type 1 (HIV-1) hijacks host cell structures called membraneless organelles (MLOs) to replicate. The HIV-1 capsid protein interacting with CPSF6 forms these nuclear MLOs, aiding viral replication.

Keywords:

HIV biomolecular condensates early steps of HIV life cycle nuclear dynamics

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Area of Science:

Virology
Cell Biology
Molecular Biology

Background:

Viruses are obligate intracellular parasites dependent on host cell machinery for replication.
Membraneless organelles (MLOs) are dynamic cellular compartments that concentrate molecules to enhance biological processes.
Viruses can exploit or induce MLO formation to facilitate their replication cycles.

Purpose of the Study:

To review the mechanisms by which Human Immunodeficiency Virus type 1 (HIV-1) manipulates host cell nuclear architecture.
To elucidate the formation and function of HIV-1-induced nuclear MLOs (HIV-MLOs).
To highlight the role of HIV-MLOs in early viral replication steps, including nuclear entry and integration.

Main Methods:

Literature review of studies on viral MLOs and HIV-1 replication.
Analysis of the interaction between the HIV-1 capsid and cellular factor CPSF6.
Examination of the formation of nuclear MLOs and their impact on viral processes.

Main Results:

HIV-1 infection induces the formation of nuclear MLOs by interacting its capsid with the host factor CPSF6.
These HIV-MLOs create specific viral/host niches within the nucleus.
These niches are crucial for efficient nuclear reverse transcription and integration of the viral genome into host chromatin.

Conclusions:

The formation of nuclear MLOs is a key strategy employed by HIV-1 to control its replication environment.
Understanding HIV-MLOs provides insights into the early stages of HIV-1 infection and potential therapeutic targets.