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Gene synthesis and expression of human torque teno virus VP3: Exploring the cancer-killing potential of an apoptin homolog

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Torque teno virus (TTV) is a small, non-enveloped animal virus that contains a single-stranded, circular DNA genome of 3.8 kb. Related to chicken anemia virus (CAV), TTV's ORF 3 may express a 105 residue protein which is homologous to CAV VP3 (apoptin)--a protein shown to multimerize and trigger apoptosis in cancer cells via a mechanism that involves nuclear translocation. Using gene synthesis, we generated the TTV ORF3 and expressed the gene fused to GFP. Here we demonstrate that TTV VP3 localizes to the cytoplasm of H1299 lung cancer cells and shows evidence of cytoplasmic aggregation. This aggregation is strikingly similar to CAV apoptin and may indicate a similar multimerization capacity for TTV VP3. However, an altered localization pattern may suggest a different mechanism of action.

  • This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.
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  • E-project-043009-122007
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  • 2009
Date created
  • 2009-04-30
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