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Vaccinia virus directs the synthesis of early mRNAs containing 5' poly(A) sequences.

Publication ,  Journal Article
Ink, BS; Pickup, DJ
Published in: Proc Natl Acad Sci U S A
February 1990

mRNAs transcribed from late promoters of several poxvirus genes contain 5' poly(A) sequences that are not complementary to the viral DNA. In contrast, early mRNAs containing 5' poly(A) sequences have not previously been identified. Modifications to the sequence of the promoter of an early gene of cowpox virus enable this promoter to direct the synthesis of RNAs containing 5' poly(A) sequences. When the sequence 3'-ATTTA-5', which is present at the RNA start-sites of several late promoters, is positioned such that the RNA start-site of the early promoter is at the first thymidylate in this sequence, this early promoter directs the synthesis of early RNAs containing 4-11 adenylates at their 5' ends. When two of the thymidylates in the sequence 3'-ATTTA-5' are removed, the promoter directs the synthesis of early RNAs lacking 5' poly(A) sequences. These results are consistent with the proposal that 5' polyadenylylation of poxvirus RNAs occurs by repetitive transcription of thymidylates in the sequence 3'-ATTTA-5' often present at the sites of transcriptional initiation. In addition, these results demonstrate that 5' polyadenylylation of viral RNAs is not exclusively a late function. The promoter regions of a few early genes of vaccinia virus contain the sequence 3'-ATTTA-5'. Analyses of the transcripts of one of these genes, the D5 gene, indicated that these mRNAs contain 5' poly(A) sequences, suggesting that early mRNAs of a subset of viral genes contain 5' poly(A) sequences.

Duke Scholars

Published In

Proc Natl Acad Sci U S A

DOI

ISSN

0027-8424

Publication Date

February 1990

Volume

87

Issue

4

Start / End Page

1536 / 1540

Location

United States

Related Subject Headings

  • Vaccinia virus
  • Transcription, Genetic
  • RNA, Messenger
  • Promoter Regions, Genetic
  • Poly A
  • Oligonucleotide Probes
  • Mutation
  • Molecular Sequence Data
  • Genetic Vectors
  • Genes, Viral
 

Citation

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Ink, B. S., & Pickup, D. J. (1990). Vaccinia virus directs the synthesis of early mRNAs containing 5' poly(A) sequences. Proc Natl Acad Sci U S A, 87(4), 1536–1540. https://doi.org/10.1073/pnas.87.4.1536
Ink, B. S., and D. J. Pickup. “Vaccinia virus directs the synthesis of early mRNAs containing 5' poly(A) sequences.Proc Natl Acad Sci U S A 87, no. 4 (February 1990): 1536–40. https://doi.org/10.1073/pnas.87.4.1536.
Ink BS, Pickup DJ. Vaccinia virus directs the synthesis of early mRNAs containing 5' poly(A) sequences. Proc Natl Acad Sci U S A. 1990 Feb;87(4):1536–40.
Ink, B. S., and D. J. Pickup. “Vaccinia virus directs the synthesis of early mRNAs containing 5' poly(A) sequences.Proc Natl Acad Sci U S A, vol. 87, no. 4, Feb. 1990, pp. 1536–40. Pubmed, doi:10.1073/pnas.87.4.1536.
Ink BS, Pickup DJ. Vaccinia virus directs the synthesis of early mRNAs containing 5' poly(A) sequences. Proc Natl Acad Sci U S A. 1990 Feb;87(4):1536–1540.
Journal cover image

Published In

Proc Natl Acad Sci U S A

DOI

ISSN

0027-8424

Publication Date

February 1990

Volume

87

Issue

4

Start / End Page

1536 / 1540

Location

United States

Related Subject Headings

  • Vaccinia virus
  • Transcription, Genetic
  • RNA, Messenger
  • Promoter Regions, Genetic
  • Poly A
  • Oligonucleotide Probes
  • Mutation
  • Molecular Sequence Data
  • Genetic Vectors
  • Genes, Viral