Retrovirus activation in embryonal carcinoma cells by cellular promoters

I. Peckham, S. Sobel, J. Comer, R. Jaenisch, Eric Barklis

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Retrovirus expression in embryonal carcinoma (EC) cells is blocked at a postintegration stage of the viral life cycle, because of the inadequate function of the viral long terminal repeat (LTR) promoter in this cell type. However, rare sites in the EC cell genome permit provirus expression by undefined mechanisms. Our analysis of three expressed proviruses indicates that they have inserted into actively transcribed regions. Two of the three, examined in detail, integrated into the first introns of cellular transcription units in close proximity to active cellular promoters. One of these cellular genes is the probable murine homolog of the yeast ribosomal protein L3, responsible for trichodermin resistance. In all cases, virus activation appears to involve production of viral transcripts that are initiated in the 5'-flanking region, transcribed through the viral LTR, and subsequently spliced from a cellular donor to a viral acceptor. Our results suggest a general procedure for the isolation of active genes and promoters in different tissues.

Original languageEnglish (US)
Pages (from-to)2062-2071
Number of pages10
JournalGenes and Development
Volume3
Issue number12 B
StatePublished - 1989

Fingerprint

Embryonal Carcinoma Stem Cells
Proviruses
Terminal Repeat Sequences
Retroviridae
Trichodermin
Virus Activation
Fungal Proteins
5' Flanking Region
Life Cycle Stages
Introns
Genes
Genome
ribosomal protein L3

Keywords

  • Embryonal carcinoma
  • Moloney murine leukemia virus
  • Retrovirus
  • Ribosomal protein L3
  • Trichodermin resistance

ASJC Scopus subject areas

  • Genetics
  • Developmental Biology

Cite this

Peckham, I., Sobel, S., Comer, J., Jaenisch, R., & Barklis, E. (1989). Retrovirus activation in embryonal carcinoma cells by cellular promoters. Genes and Development, 3(12 B), 2062-2071.

Retrovirus activation in embryonal carcinoma cells by cellular promoters. / Peckham, I.; Sobel, S.; Comer, J.; Jaenisch, R.; Barklis, Eric.

In: Genes and Development, Vol. 3, No. 12 B, 1989, p. 2062-2071.

Research output: Contribution to journalArticle

Peckham, I, Sobel, S, Comer, J, Jaenisch, R & Barklis, E 1989, 'Retrovirus activation in embryonal carcinoma cells by cellular promoters', Genes and Development, vol. 3, no. 12 B, pp. 2062-2071.
Peckham, I. ; Sobel, S. ; Comer, J. ; Jaenisch, R. ; Barklis, Eric. / Retrovirus activation in embryonal carcinoma cells by cellular promoters. In: Genes and Development. 1989 ; Vol. 3, No. 12 B. pp. 2062-2071.
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