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The nucleolus and viral infection
Lei Wang1, Xiao-ming Ren, Jun-ji Xing
1State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China.
Virologica Sinica
|October 21, 2010
Summary
The nucleolus, a key nuclear body, performs diverse functions beyond rRNA synthesis, including stress sensing and cell cycle regulation. This review explores its multifaceted roles and involvement in viral infections.
Area of Science:
- Cell Biology
- Molecular Biology
- Virology
Background:
- The nucleolus is a prominent subnuclear structure in eukaryotic cells.
- Traditionally, its function was limited to ribosomal RNA (rRNA) biogenesis and processing.
- Emerging evidence highlights expanded roles for the nucleolus.
Purpose of the Study:
- To review current understanding of nucleolar functions.
- To discuss the regulation of protein localization within the nucleolus.
- To explore the nucleolus's role in viral infections, referencing specific herpesvirus proteins.
Main Methods:
- Literature review of recent research on nucleolar functions.
- Analysis of protein localization mechanisms in the nucleolus.
- Integration of experimental findings on herpes simplex virus type 1 (HSV-1) and bovine herpesvirus-1 (BoHV-1) interactions with the nucleolus.
Main Results:
- The nucleolus is implicated in tRNA precursor processing, stress sensing, gene silencing, senescence, and cell cycle regulation.
- Specific viral proteins, such as HSV-1 US11 and UL24, and BoHV-1 ICP27, interact with and potentially manipulate nucleolar functions.
- Understanding nucleolar protein localization is crucial for deciphering its diverse roles.
Conclusions:
- The nucleolus is a dynamic organelle with critical roles extending beyond ribosome biogenesis.
- Its involvement in cellular processes makes it a potential target for viral pathogenesis.
- Further research is needed to fully elucidate the complex interplay between the nucleolus and viral infections.
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