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Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...

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Related Experiment Video

Updated: Mar 11, 2026

Measurement of In Vitro Integration Activity of HIV-1 Preintegration Complexes

Measurement of In Vitro Integration Activity of HIV-1 Preintegration Complexes

Published on: February 22, 2017

Cytoplasmic viral replication complexes.

Johan A den Boon¹, Arturo Diaz, Paul Ahlquist

¹Institute for Molecular Virology, University of Wisconsin-Madison, Madison, WI 53706, USA.

Cell Host & Microbe

|July 20, 2010

Summary

This summary is machine-generated.

Many viruses create specialized compartments for RNA replication, improving efficiency and defense. These structures show similarities across diverse virus types, suggesting shared evolutionary origins.

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Measurement of In Vitro Integration Activity of HIV-1 Preintegration Complexes

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Published on: November 12, 2015

Area of Science:

Virology
Molecular Biology
Cell Biology

Background:

Many viruses replicate in the cytoplasm, forming distinct structures for genome replication and transcription.
These organelle-like structures enhance viral replication efficiency and evade host immune responses.
Recent research focuses on the ultrastructure and function of these replication complexes in positive-strand RNA viruses.

Purpose of the Study:

To elucidate the ultrastructure of membrane-bound RNA replication complexes in positive-strand RNA viruses.
To understand how these complexes coordinate with virion assembly and budding.
To explore potential evolutionary links between different viral replication strategies.

Main Methods:

Ultrastructural analysis of virus-infected cells.
High-resolution microscopy techniques.
Comparative analysis of viral replication mechanisms.

Main Results:

Detailed ultrastructure of membrane-bound RNA replication complexes has been elucidated.
These complexes demonstrate close coordination with virion assembly and budding processes.
Parallels and potential evolutionary links identified with other viral replication strategies.

Conclusions:

Cytoplasmic RNA replication compartments are crucial for viral propagation.
The coordination between replication and assembly highlights sophisticated viral strategies.
Shared features suggest common evolutionary pathways for viral replication factories.