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J Virol. 1979 August; 31(2): 447-462

Isolation and localization of herpes simplex virus type 1 mRNA abundant before viral DNA synthesis.

ABSTRACT

Herpes simplex virus type 1 (HSV-1) DNA covalently bound to cellulose was used as a reagent to isolate viral RNA transcripts for size analysis on denaturing agarose gels. Nuclear and polyribosomal RNA isolated at 2 h postinfection (p.i.) migrated with sizes between 1,500 and 5,500 nucleotides. At 6 h p.i. (when viral DNA synthesis is underway), viral polyribosome-associated polyadenylated RNA showed different discrete sizes of species predominating, with RNA larger than 5,500 nucleotides clearly present. Nearly 50% of the newly made viral RNA found in the nucleus at 6 h p.i. was from 5,000 to 10,000 nucleotides in length. A high-resolution transcription map of the viral mRNA abundant at 2 h p.i. was compiled from the hybridization of Southern blots of HSV-1 DNA restriction fragments to both sizes of fractionated polyribosomal polyadenylated RNA and 3' complementary DNA probe made to this size of fractionated RNA. We have identified and mapped 16 mRNA species abundant at 2 h p.i. These RNAs range in size from 1,500 to 5,300 nucleotides and map throughout the HSV-1 genome. In some instances, a direction of transcription can be suggested. Further, about one-third of this number of mRNA's has been found in cells infected with a DNA-negative temperature-sensitive mutant (tsB2) and grown at the nonpermissive temperature (39 degrees C).

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