Expression of transcription factor E2F1 induces quiescent cells to enter S phase

David G. Johnson, James K. Schwarz, W. Douglas Cress, Joseph R. Nevins

Research output: Contribution to journalArticle

Abstract

SEVERAL lines of evidence implicate the E2F transcription factor as an important component of cell proliferation control. First, E2F binding sites are found in the promoters of genes responsive to proliferation signals and the level of E2F binding activity increases at a time when many of these genes are activated1-3. Second, the tumour suppressor protein Rb, as well as the related p107 protein, complexes with E2F2-7, resulting in an inhibition of E2F transcriptional activity3,8-12. Third, oncogenic products of the DNA tumour viruses can dissociate these E2F complexes4,13. We provide here direct evidence that E2F is involved in cellular proliferation control. Specifically, we demonstrate that overexpression of the E2F1 complementary DNA14,15 can activate DNA synthesis in cells that would otherwise growth-arrest, with an efficiency that is similar to that achieved by the expression of the adenovirus E1A gene. Moreover, microinjection of the E2F1 cDNA into quiescent cells can induce S-phase entry, whereas two E2F1 mutants, which are unable to transactivate the DHFR and TK promoters, are unable to induce S phase. We conclude that the E2F transcription factor plays an important role in progression into S phase and that this probably coincides with its capacity to stimulate transcription.

Original languageEnglish (US)
JournalNature
Volume365
Issue number6444
StatePublished - Sep 23 1993
Externally publishedYes

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E2F1 Transcription Factor
S Phase
E2F Transcription Factors
DNA Tumor Viruses
Cell Proliferation
Genes
Tumor Suppressor Proteins
Microinjections
Adenoviridae
Complementary DNA
Binding Sites
DNA
Growth
Proteins

ASJC Scopus subject areas

  • General

Cite this

Johnson, D. G., Schwarz, J. K., Cress, W. D., & Nevins, J. R. (1993). Expression of transcription factor E2F1 induces quiescent cells to enter S phase. Nature, 365(6444).

Expression of transcription factor E2F1 induces quiescent cells to enter S phase. / Johnson, David G.; Schwarz, James K.; Cress, W. Douglas; Nevins, Joseph R.

In: Nature, Vol. 365, No. 6444, 23.09.1993.

Research output: Contribution to journalArticle

Johnson, DG, Schwarz, JK, Cress, WD & Nevins, JR 1993, 'Expression of transcription factor E2F1 induces quiescent cells to enter S phase', Nature, vol. 365, no. 6444.
Johnson, David G. ; Schwarz, James K. ; Cress, W. Douglas ; Nevins, Joseph R. / Expression of transcription factor E2F1 induces quiescent cells to enter S phase. In: Nature. 1993 ; Vol. 365, No. 6444.
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