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. 1988 Nov;62(11):4051–4058. doi: 10.1128/jvi.62.11.4051-4058.1988

Fine mapping of the latency-related gene of herpes simplex virus type 1: alternative splicing produces distinct latency-related RNAs containing open reading frames.

S L Wechsler 1, A B Nesburn 1, R Watson 1, S M Slanina 1, H Ghiasi 1
PMCID: PMC253835  PMID: 2845123

Abstract

The latency-related (LR) gene of herpes simplex virus type 1 (HSV-1) is transcriptionally active during HSV-1 latency, producing at least two LR-RNAs. The LR gene partially overlaps the immediate-early gene ICP0 and is transcribed in the opposite direction from ICP0, producing LR-RNAs that are complementary (antisense) to ICP0 mRNA. The LR gene is thought to be involved in HSV-1 latency. We report here the fine mapping and partial sequence analysis of this HSV-1 LR gene. 32P-labeled genomic DNA restriction fragments and synthetic oligonucleotides were used as probes for in situ hybridizations and Northern (RNA) blot hybridizations of RNA from trigeminal ganglia of rabbits latently infected with HSV-1. The two most abundant LR-RNAs appeared to share their 5' and 3' ends and to be produced by alternative splicing. These LR-RNAs were approximately 2 and 1.3 to 1.5 kilobases in length and were designated LR-RNA 1 and LR-RNA 2, respectively. Their 5' ends started approximately 1,210 nucleotides downstream from the 3' end of the ICP0 mRNA. Their 3' ends overlapped ICP0 by nearly 1,000 nucleotides. LR-RNA 1 appeared to have at least one intron removed, while LR-RNA 2 appeared to have at least two introns removed. The LR-RNAs contained two potential long open reading frames, suggesting the possibility that one or more of the LR-RNAs may be a functional mRNA.

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Selected References

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