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. 1992 Aug 15;89(16):7836–7839. doi: 10.1073/pnas.89.16.7836

Proteins of transcription factor ISGF-3: one gene encodes the 91-and 84-kDa ISGF-3 proteins that are activated by interferon alpha.

C Schindler 1, X Y Fu 1, T Improta 1, R Aebersold 1, J E Darnell Jr 1
PMCID: PMC49806  PMID: 1502203

Abstract

ISGF-3 is an interferon-dependent positive-acting transcription factor that is cytoplasmically activated, possibly through direct interaction with the interferon receptor. The factor has been purified, its component proteins have been separated, and its peptide sequences have been obtained. From the sequences, degenerate oligonucleotide probes were constructed to screen for cDNA clones. Sequencing of the selected clones shows that the 91- and 84-kDa components represent two forms of a previously unknown (to our knowledge) protein. Several antibodies raised against these proteins prove that they indeed do encode protein components of ISGF-3. This work provides reagents to explore the modification of this cytoplasmically activated transcription factor.

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Selected References

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  1. Aebersold R. H., Leavitt J., Saavedra R. A., Hood L. E., Kent S. B. Internal amino acid sequence analysis of proteins separated by one- or two-dimensional gel electrophoresis after in situ protease digestion on nitrocellulose. Proc Natl Acad Sci U S A. 1987 Oct;84(20):6970–6974. doi: 10.1073/pnas.84.20.6970. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Dale T. C., Imam A. M., Kerr I. M., Stark G. R. Rapid activation by interferon alpha of a latent DNA-binding protein present in the cytoplasm of untreated cells. Proc Natl Acad Sci U S A. 1989 Feb;86(4):1203–1207. doi: 10.1073/pnas.86.4.1203. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Friedman R. L., Manly S. P., McMahon M., Kerr I. M., Stark G. R. Transcriptional and posttranscriptional regulation of interferon-induced gene expression in human cells. Cell. 1984 Oct;38(3):745–755. doi: 10.1016/0092-8674(84)90270-8. [DOI] [PubMed] [Google Scholar]
  4. Fu X. Y., Kessler D. S., Veals S. A., Levy D. E., Darnell J. E., Jr ISGF3, the transcriptional activator induced by interferon alpha, consists of multiple interacting polypeptide chains. Proc Natl Acad Sci U S A. 1990 Nov;87(21):8555–8559. doi: 10.1073/pnas.87.21.8555. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Kessler D. S., Levy D. E. Protein kinase activity required for an early step in interferon-alpha signaling. J Biol Chem. 1991 Dec 5;266(34):23471–23476. [PubMed] [Google Scholar]
  6. Kessler D. S., Veals S. A., Fu X. Y., Levy D. E. Interferon-alpha regulates nuclear translocation and DNA-binding affinity of ISGF3, a multimeric transcriptional activator. Genes Dev. 1990 Oct;4(10):1753–1765. doi: 10.1101/gad.4.10.1753. [DOI] [PubMed] [Google Scholar]
  7. Larner A. C., Chaudhuri A., Darnell J. E., Jr Transcriptional induction by interferon. New protein(s) determine the extent and length of the induction. J Biol Chem. 1986 Jan 5;261(1):453–459. [PubMed] [Google Scholar]
  8. Larner A. C., Jonak G., Cheng Y. S., Korant B., Knight E., Darnell J. E., Jr Transcriptional induction of two genes in human cells by beta interferon. Proc Natl Acad Sci U S A. 1984 Nov;81(21):6733–6737. doi: 10.1073/pnas.81.21.6733. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Levy D. E., Kessler D. S., Pine R., Darnell J. E., Jr Cytoplasmic activation of ISGF3, the positive regulator of interferon-alpha-stimulated transcription, reconstituted in vitro. Genes Dev. 1989 Sep;3(9):1362–1371. doi: 10.1101/gad.3.9.1362. [DOI] [PubMed] [Google Scholar]
  10. Levy D. E., Kessler D. S., Pine R., Reich N., Darnell J. E., Jr Interferon-induced nuclear factors that bind a shared promoter element correlate with positive and negative transcriptional control. Genes Dev. 1988 Apr;2(4):383–393. doi: 10.1101/gad.2.4.383. [DOI] [PubMed] [Google Scholar]
  11. Levy D. E., Lew D. J., Decker T., Kessler D. S., Darnell J. E., Jr Synergistic interaction between interferon-alpha and interferon-gamma through induced synthesis of one subunit of the transcription factor ISGF3. EMBO J. 1990 Apr;9(4):1105–1111. doi: 10.1002/j.1460-2075.1990.tb08216.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Levy D., Darnell J. E., Jr Interferon-dependent transcriptional activation: signal transduction without second messenger involvement? New Biol. 1990 Oct;2(10):923–928. [PubMed] [Google Scholar]
  13. Reich N. C., Pfeffer L. M. Evidence for involvement of protein kinase C in the cellular response to interferon alpha. Proc Natl Acad Sci U S A. 1990 Nov;87(22):8761–8765. doi: 10.1073/pnas.87.22.8761. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Smith D. B., Johnson K. S. Single-step purification of polypeptides expressed in Escherichia coli as fusions with glutathione S-transferase. Gene. 1988 Jul 15;67(1):31–40. doi: 10.1016/0378-1119(88)90005-4. [DOI] [PubMed] [Google Scholar]
  15. Wedrychowski A., Seong D., Paslidis N., Johnson E., Howard O. M., Sims S., Talpaz M., Kantarjian H., Hester J., Turpin J. Characterization of nuclear proteins which bind to interferon-inducible transcriptional enhancers in hematopoietic cells. J Biol Chem. 1990 Dec 15;265(35):21433–21440. [PubMed] [Google Scholar]

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