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Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins
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Host protein Snapin interacts with human cytomegalovirus pUL130 and affects viral DNA replication

Guili Wang1, Gaowei Ren, Xin Cui

  • 1Virus Laboratory, The Affiliated Shengjing Hospital, China Medical University, Shenyang 110004, China.

Journal of Biosciences
|June 1, 2016
PubMed

Insights

Human cytomegalovirus (HCMV) UL130 protein interacts with host protein Snapin. Snapin modulates HCMV DNA synthesis, impacting viral replication and infection outcomes.

Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Human cytomegalovirus (HCMV) infection outcomes depend on host-pathogen interactions.
  • HCMV replication in endothelial and epithelial cells requires the UL128-131 protein complex.
  • The UL130 protein is crucial for HCMV tropism, but its host interactions are poorly understood.

Purpose of the Study:

  • To identify host factors interacting with the HCMV UL130 protein.
  • To investigate the functional role of identified host interactions in HCMV replication.

Main Methods:

  • Yeast two-hybrid screening to identify interacting proteins.
  • In vitro glutathione S-transferase (GST) pull-down assays.
  • Co-immunoprecipitation and fluorescence confocal microscopy to confirm interactions and localization.
  • Small interfering RNA (siRNA) to deplete host factor levels and assess viral replication.

Main Results:

  • Direct interaction between HCMV UL130 and human Snapin was confirmed using multiple biochemical methods.
  • UL130 and Snapin co-localized in the cell membrane and cytoplasm.
  • Depletion of Snapin using siRNA significantly reduced HCMV DNA copy number and viral titer.
  • These findings implicate Snapin as a host factor modulating HCMV replication.

Conclusions:

  • Snapin directly interacts with the HCMV UL130 protein.
  • Snapin plays a significant role in regulating HCMV DNA synthesis and viral replication.
  • Targeting the UL130-Snapin interaction could offer novel therapeutic strategies against HCMV infections.

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