Abstract
E2F is a sequence-specific DNA-binding factor which binds to sites that occur in pairs upstream of the adenovirus E1A and E2 early transcriptional start sites. Substantial quantities of E2F activity were found in uninfected-cell extracts, and there was a modest increase in E2F activity during an adenovirus type 5 (Ad5) infection. In uninfected cells, E2F was found to exist in multiple forms that could be separated chromatographically. Extracts prepared at 24 h after Ad5 infection contained a new form of E2F. This infection-specific form may have been a modified version of one of the forms present in uninfected cells. The infection-specific E2F was shown to bind cooperatively to a pair of E2F sites found upstream of the Ad2 early region 2 mRNA cap site. This binding was sensitive to the spacing between the sites and their relative orientation. In contrast, E2F binding in uninfected-cell extracts was unaffected by changes in orientation and spacing, consistent with very low cooperativity or independent binding.
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- Carthew R. W., Chodosh L. A., Sharp P. A. An RNA polymerase II transcription factor binds to an upstream element in the adenovirus major late promoter. Cell. 1985 Dec;43(2 Pt 1):439–448. doi: 10.1016/0092-8674(85)90174-6. [DOI] [PubMed] [Google Scholar]
- Chodosh L. A., Carthew R. W., Sharp P. A. A single polypeptide possesses the binding and transcription activities of the adenovirus major late transcription factor. Mol Cell Biol. 1986 Dec;6(12):4723–4733. doi: 10.1128/mcb.6.12.4723. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Chow L. T., Broker T. R., Lewis J. B. Complex splicing patterns of RNAs from the early regions of adenovirus-2. J Mol Biol. 1979 Oct 25;134(2):265–303. doi: 10.1016/0022-2836(79)90036-6. [DOI] [PubMed] [Google Scholar]
- Dignam J. D., Lebovitz R. M., Roeder R. G. Accurate transcription initiation by RNA polymerase II in a soluble extract from isolated mammalian nuclei. Nucleic Acids Res. 1983 Mar 11;11(5):1475–1489. doi: 10.1093/nar/11.5.1475. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fried M., Crothers D. M. Equilibria and kinetics of lac repressor-operator interactions by polyacrylamide gel electrophoresis. Nucleic Acids Res. 1981 Dec 11;9(23):6505–6525. doi: 10.1093/nar/9.23.6505. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Galas D. J., Schmitz A. DNAse footprinting: a simple method for the detection of protein-DNA binding specificity. Nucleic Acids Res. 1978 Sep;5(9):3157–3170. doi: 10.1093/nar/5.9.3157. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hardy S., Engel D. A., Shenk T. An adenovirus early region 4 gene product is required for induction of the infection-specific form of cellular E2F activity. Genes Dev. 1989 Jul;3(7):1062–1074. doi: 10.1101/gad.3.7.1062. [DOI] [PubMed] [Google Scholar]
- Hardy S., Shenk T. Adenoviral control regions activated by E1A and the cAMP response element bind to the same factor. Proc Natl Acad Sci U S A. 1988 Jun;85(12):4171–4175. doi: 10.1073/pnas.85.12.4171. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hearing P., Shenk T. The adenovirus type 5 E1A enhancer contains two functionally distinct domains: one is specific for E1A and the other modulates all early units in cis. Cell. 1986 Apr 25;45(2):229–236. doi: 10.1016/0092-8674(86)90387-9. [DOI] [PubMed] [Google Scholar]
- Hearing P., Shenk T. The adenovirus type 5 E1A transcriptional control region contains a duplicated enhancer element. Cell. 1983 Jul;33(3):695–703. doi: 10.1016/0092-8674(83)90012-0. [DOI] [PubMed] [Google Scholar]
- Imperiale M. J., Nevins J. R. Adenovirus 5 E2 transcription unit: an E1A-inducible promoter with an essential element that functions independently of position or orientation. Mol Cell Biol. 1984 May;4(5):875–882. doi: 10.1128/mcb.4.5.875. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Jones N., Shenk T. Isolation of deletion and substitution mutants of adenovirus type 5. Cell. 1978 Jan;13(1):181–188. doi: 10.1016/0092-8674(78)90148-4. [DOI] [PubMed] [Google Scholar]
- Kovesdi I., Reichel R., Nevins J. R. Identification of a cellular transcription factor involved in E1A trans-activation. Cell. 1986 Apr 25;45(2):219–228. doi: 10.1016/0092-8674(86)90386-7. [DOI] [PubMed] [Google Scholar]
- Kovesdi I., Reichel R., Nevins J. R. Role of an adenovirus E2 promoter binding factor in E1A-mediated coordinate gene control. Proc Natl Acad Sci U S A. 1987 Apr;84(8):2180–2184. doi: 10.1073/pnas.84.8.2180. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lin S. Y., Riggs A. D. Photochemical attachment of lac repressor to bromodeoxyuridine-substituted lac operator by ultraviolet radiation. Proc Natl Acad Sci U S A. 1974 Mar;71(3):947–951. doi: 10.1073/pnas.71.3.947. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Murthy S. C., Bhat G. P., Thimmappaya B. Adenovirus EIIA early promoter: transcriptional control elements and induction by the viral pre-early EIA gene, which appears to be sequence independent. Proc Natl Acad Sci U S A. 1985 Apr;82(8):2230–2234. doi: 10.1073/pnas.82.8.2230. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Reichel R., Kovesdi I., Nevins J. R. Activation of a preexisting cellular factor as a basis for adenovirus E1A-mediated transcription control. Proc Natl Acad Sci U S A. 1988 Jan;85(2):387–390. doi: 10.1073/pnas.85.2.387. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Reichel R., Neill S. D., Kovesdi I., Simon M. C., Raychaudhuri P., Nevins J. R. The adenovirus E4 gene, in addition to the E1A gene, is important for trans-activation of E2 transcription and for E2F activation. J Virol. 1989 Sep;63(9):3643–3650. doi: 10.1128/jvi.63.9.3643-3650.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Safer B., Cohen R. B., Garfinkel S., Thompson J. A. DNA affinity labeling of adenovirus type 2 upstream promoter sequence-binding factors identifies two distinct proteins. Mol Cell Biol. 1988 Jan;8(1):105–113. doi: 10.1128/mcb.8.1.105. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yee A. S., Raychaudhuri P., Jakoi L., Nevins J. R. The adenovirus-inducible factor E2F stimulates transcription after specific DNA binding. Mol Cell Biol. 1989 Feb;9(2):578–585. doi: 10.1128/mcb.9.2.578. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yee A. S., Reichel R., Kovesdi I., Nevins J. R. Promoter interaction of the E1A-inducible factor E2F and its potential role in the formation of a multi-component complex. EMBO J. 1987 Jul;6(7):2061–2068. doi: 10.1002/j.1460-2075.1987.tb02471.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Zajchowski D. A., Boeuf H., Kédinger C. The adenovirus-2 early EIIa transcription unit possesses two overlapping promoters with different sequence requirements for EIa-dependent stimulation. EMBO J. 1985 May;4(5):1293–1300. doi: 10.1002/j.1460-2075.1985.tb03775.x. [DOI] [PMC free article] [PubMed] [Google Scholar]