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Phosphorylation of measles virus phosphoprotein at S86 and/or S151 downregulates viral transcriptional activity

Akihiro Sugai1, Hiroki Sato, Misako Yoneda

  • 1International Research Center for Infectious Diseases, The Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo, Japan.

FEBS Letters
|October 2, 2012
PubMed

Insights

Measles virus phosphoprotein (P protein) phosphorylation inversely correlates with viral transcription. Increased P protein phosphorylation reduces measles virus transcriptional activity, suggesting a regulatory role.

Area of Science:

  • Virology
  • Molecular Biology
  • Biochemistry

Background:

  • Measles virus phosphoprotein (P protein) acts as a cofactor for the viral RNA polymerase (L protein).
  • P protein associates with the nucleoprotein-RNA complex, facilitating viral transcription and replication.

Purpose of the Study:

  • To investigate the role of measles virus P protein phosphorylation in regulating viral transcription.
  • To determine the correlation between P protein phosphorylation levels and viral transcriptional activity.

Main Methods:

  • Analysis of the correlation between P protein phosphorylation status and viral transcriptional activity.
  • Investigating the impact of P protein phosphorylation upregulation on viral transcription.
  • Identifying specific phosphorylation sites (S86 and S151) involved in downregulation.

Main Results:

  • A significant inverse correlation was observed between P protein phosphorylation levels and measles virus transcriptional activity.
  • Upregulation of P protein phosphorylation led to a reduction in viral transcription.
  • Specific phosphorylation at S86 and S15 of P protein was found to downregulate viral transcription.

Conclusions:

  • Measles virus P protein phosphorylation status plays a crucial role in regulating viral transcription.
  • Phosphorylation of P protein, particularly at S86 and S151, acts as a negative regulator of viral transcription.

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