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. 1983 Mar;45(3):1056–1064. doi: 10.1128/jvi.45.3.1056-1064.1983

Identification and Characterization of a Herpes Simplex Virus Gene Product Required for Encapsidation of Virus DNA

Valerie G Preston 1, Jonathan A V Coates 1, Frazer J Rixon 1
PMCID: PMC256513  PMID: 6300447

Abstract

A mutant of herpes simplex virus type 1, 17tsVP1201, has a temperature-sensitive processing defect in a late virus polypeptide. Immunoprecipitation studies with monoclonal antibodies showed that the aberrant polypeptide in mutant virus-infected cells was the nucleocapsid polypeptide known as p40. Since a revertant, TS+ for growth, processed the polypeptide normally under conditions restrictive for the mutant, the processing event must be essential for virus replication. Electron microscopic analysis of mutant virus-infected cells grown at the nonpermissive temperature revealed that the nuclei contained large aggregations of empty nucleocapsids possessing some internal structure. Therefore, although the mutant synthesized virus DNA at the nonpermissive temperature, the DNA was not packaged into nucleocapsids. When mutant virus-infected cells were shifted from 39 to 31°C in the presence of cycloheximide, the polypeptide p40 was processed to lower-molecular-weight forms, and full nucleocapsids were detected in the cell nuclei. The aberrant polypeptide of the mutant, however, was not processed in cells mixedly infected with 17tsVP1201 and a revertant at the nonpermissive temperature, suggesting that the defect of the mutant was in the gene encoding p40 rather than in a gene of a processing enzyme.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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