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Published on: July 18, 2013
The Role of Promyelocytic Leukemia Nuclear Bodies During HPV Infection
Lucile G Guion1,2, Martin Sapp1,2
1Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, Shreveport, LA, United States.
Abstract:
Promyelocytic leukemia (PML) nuclear bodies (NBs) are highly dynamic subnuclear structures. Their name giving major component, PML protein, is essential for their formation. PML is present in many different isoforms due to differential splicing, which seem to contribute differently to PML NBs function. Sp100 and DAXX are also permanently residing in these structures. PML NBs disassemble in mitosis to form large cytoplasmic aggregates and reassemble after completion of cell division. Posttranslational modifications such as SUMOylation play important roles for protein association with PML NBs. In addition to the factors permanently associated with PML NBs, a large number of proteins may transiently reside in PML NBs dependent on cell stage, type, and condition. PML NBs have been indirectly implicated in a large number of cellular processes including apoptosis, transcriptional regulation, DNA repair and replication. They are considered hot spots for posttranslational modifications and may serve as readily accessible protein depots. However, a precise function has been difficult to assign. Many DNA viruses target PML NBs after entry often resulting in reorganization of these subnuclear structures. Antiviral activity has been assigned to PML NBs partially based on the observation that PML protein is an interferon stimulated gene. In contrast, human papillomavirus (HPV) infection requires the presence of PML protein suggesting that PML NBs may be essential to establish infection. This review will summarize and discuss recent advances in our understanding of the role of PML NBs and individual protein components in the establishment of HPV infection.
Insights
Promyelocytic leukemia (PML) nuclear bodies (NBs) are dynamic structures crucial for cellular processes. This review explores their role in human papillomavirus (HPV) infection, highlighting PML protein
Area of Science:
- Cell Biology
- Molecular Biology
- Virology
Background:
- Promyelocytic leukemia (PML) nuclear bodies (NBs) are dynamic subnuclear structures essential for cellular functions.
- PML protein, its isoforms, Sp100, and DAXX are key components of PML NBs.
- PML NBs undergo dynamic changes during the cell cycle and are involved in various cellular processes.
Purpose of the Study:
- To review recent advances in understanding the role of PML NBs in human papillomavirus (HPV) infection.
- To discuss the function of individual protein components within PML NBs during HPV infection establishment.
Main Methods:
- Literature review of recent scientific advances.
- Synthesis of current knowledge on PML NBs and their interaction with viruses.
- Analysis of the role of PML protein in HPV infection.
Main Results:
- PML NBs are implicated in apoptosis, transcriptional regulation, DNA repair, and replication.
- Many viruses target PML NBs, but HPV infection requires PML protein presence.
- PML NBs may be essential for establishing HPV infection.
Conclusions:
- PML NBs play a complex role in cellular processes and viral interactions.
- The specific function of PML NBs in HPV infection establishment is an active area of research.
- Further investigation into PML NBs and their protein components is crucial for understanding HPV pathogenesis.
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