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. 1987 Mar;61(3):639–645. doi: 10.1128/jvi.61.3.639-645.1987

Noncoordinate regulation of a vaccinia virus late gene cluster.

S L Weinrich, D E Hruby
PMCID: PMC254001  PMID: 3806794

Abstract

Identification of a tightly spaced and tandemly oriented late gene cluster within the central conserved region of the vaccinia virus genome suggested the possibility of coordinate regulation of the genes within this domain (S.L. Weinrich and D.E. Hruby, Nucleic Acids Res. 14:3003-3016, 1986). To test this hypothesis, the steady-state levels of transcripts derived from the individual late genes were examined. Cytoplasmic RNA was isolated from infected cells at hourly intervals throughout infection and was used in concert with 5' S1 nuclease mapping procedures to detect transcripts from specific late genes. Among the set of six closely linked late genes, marked differences were observed in both the levels of transcription and the kinetic patterns of expression, providing direct evidence for the existence of differentially regulated gene subsets within the late gene class. Furthermore, these experiments identified one of the genes (encoding a 33,000-molecular-weight polypeptide) as being expressed both early and late postinfection. Interestingly, although transcripts from the constitutively expressed gene were initiated at the same start sites throughout infection, a discrete terminus for these transcripts was detected only at early times. These data suggest that the lack of cis-acting termination signals is not the reason for the late gene transcript heterogeneity observed in vaccinia virus-infected cells.

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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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