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Related Experiment Video

Updated: Jul 10, 2026

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

Published on: September 26, 2011

ALIX catches HIV.

Juan Martin-Serrano¹, Mark Marsh

¹Department of Infectious Diseases, King's College London School of Medicine, Second Floor, New Guy's House, Guy's Hospital, London SE1 9RT, United Kingdom. juan.martin_serrano@kcl.ac.uk

Cell Host & Microbe

|November 17, 2007

Summary

This summary is machine-generated.

New research reveals the structure of ALIX/AIP1, an ESCRT-associated protein, and its interaction with HIV Gag. This study highlights the crucial role of ESCRT-III in viral release, suggesting undiscovered cellular proteins are involved.

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Last Updated: Jul 10, 2026

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

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Published on: September 26, 2011

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Published on: May 16, 2012

Area of Science:

Molecular biology
Virology
Structural biology

Background:

The Endosomal Sorting Complex Required for Transport (ESCRT) machinery and associated proteins are crucial for the assembly and release of various RNA viruses, notably Human Immunodeficiency Virus (HIV).
Understanding the molecular mechanisms of viral release is vital for developing effective antiviral therapies.

Purpose of the Study:

To elucidate the structural basis of the interaction between the ESCRT-associated protein ALIX/AIP1 and HIV Gag.
To provide further evidence for the role of the ESCRT-III complex in mediating viral release.
To identify potential new cellular factors involved in HIV egress.

Main Methods:

X-ray crystallography was used to determine the structures of ALIX/AIP1 in complex with HIV Gag components.
Biochemical assays were employed to validate the protein-protein interactions.
Cellular imaging techniques were utilized to observe the localization and function of ESCRT proteins during viral budding.

Main Results:

The structures reveal specific interfaces through which ALIX/AIP1 interacts with HIV Gag, providing atomic-level detail.
The study provides compelling evidence that the ESCRT-III complex directly mediates critical steps in the release of HIV particles.
Evidence suggests the involvement of additional, yet unidentified, cellular proteins in the ESCRT-mediated viral release pathway.

Conclusions:

The structural and functional data advance our understanding of how ESCRT machinery facilitates HIV release.
This work underscores the importance of ESCRT-III in viral egress and opens avenues for discovering novel host factors that could be targeted for therapeutic intervention.
Further research is warranted to identify the newly suggested cellular proteins involved in this process.