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Updated: Aug 20, 2026

Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins
Published on: August 31, 2017
Proteomics of herpes simplex virus infected cell protein 27: association with translation initiation factors
Errin C Fontaine-Rodriguez1, Travis J Taylor, Melanie Olesky
1Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115, USA.
Abstract:
The herpes simplex virus (HSV) immediate early ICP27 protein plays an essential role in stimulating viral early and late gene expression. ICP27 appears to be multifunctional in that it has been reported to stimulate viral late gene transcription, polyadenylation site usage, and RNA export. We report here on proteomic studies involving immunoprecipitation of ICP27 and mass spectrometric identification of co-precipitated proteins. These studies show an association of ICP27 with the cellular translation initiation factors poly A binding protein (PABP), eukaryotic initiation factor 3 (eIF3), and eukaryotic initiation factor 4G (eIF4G) in infected cells. Immunoprecipitation-western blot studies confirmed these associations. Finally, purified MBP-tagged ICP27 (MBP-27) can interact with eIF3 subunits p47 and p116 in vitro. These results suggest that ICP27 may also play a role in stimulating translation of certain viral and host mRNAs and/or in inhibiting host mRNA translation.
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