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Published on: November 12, 2015
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Nuclear entry of DNA viruses
1Department of Zoology, University of British Columbia Vancouver, BC, Canada.
Frontiers in Microbiology
|June 2, 2015
Summary
DNA viruses deliver their genome into host cell nuclei via diverse strategies, utilizing or bypassing the nuclear pore complex (NPC). Understanding these distinct viral entry mechanisms is crucial for infection control.
Area of Science:
- Virology
- Cell Biology
- Molecular Biology
Background:
- DNA viruses replicate in the host cell nucleus, requiring genome delivery across the nuclear envelope.
- Nuclear transport is a regulated process mediated by the nuclear pore complex (NPC).
- Viral strategies for nuclear entry are diverse, reflecting variations in virus size and structure.
Purpose of the Study:
- To review the mechanisms DNA viruses employ to deliver their genomes into the host cell nucleus.
- To present experimental evidence supporting various viral nuclear entry pathways.
Main Methods:
- Literature review of studies on DNA virus nuclear import.
- Analysis of experimental data on viral capsid and genome trafficking.
- Comparative analysis of distinct viral entry strategies.
Main Results:
- Viral nuclear entry mechanisms vary significantly, with some using the NPC and others employing NPC-independent pathways.
- Examples include intact capsid entry (baculovirus), NPC crossing with nuclear disassembly (hepatitis B virus), and distinct docking/genome delivery (herpes simplex virus, adenovirus).
- Parvoviruses and human papillomaviruses exemplify NPC-independent nuclear access.
Conclusions:
- Each DNA virus has evolved unique strategies for nuclear genome delivery.
- Understanding these diverse mechanisms is fundamental to comprehending viral infection processes.
- Further research into viral trafficking pathways can inform antiviral strategies.
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