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Lytic infection with herpes virus type 1 (HSV-1) causes the accumulation of a 40-kDa cellular protein (p40) which is also overexpressed in cultured cells transformed by HSV or other agents and in human cervical tumors. Accumulation of p40 is dependent upon viral protein synthesis but not viral DNA replication in the infected cell and occurs in the HSV-1 mutants tsK and tsLB2 in which only a defective ICP4 protein and the four other immediate-early proteins are synthesized. By using a panel of HSV-1 strains, each defective in one of these four proteins, we show that only a mutation in the gene encoding ICP27 abolishes p40 accumulation. The defect in this mutant virus can be rescued by a plasmid encoding ICP27 alone indicating that ICP27 is obligately required for p40 accumulation. The significance of this effect as one aspect of the interaction of viral control proteins with cellular genes is discussed. © 1989.

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Journal article



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67 - 72