Nature 373, 632 - 635 (16 February 1995); doi:10.1038/373632a0

Interaction with RAP74 subunit of TFIIF is required for transcriptional activation by serum response factor

Vèronique Joliot^*, Mark Demma & Ron Prywes

Department of Biological Sciences, Columbia University, New York, New York 10027, USA
^*Present address: Institut Curie, Centre Universitaire Paris XI, 91405 Orsay cedex, France.

A FEW general transcription factors, in particular TFIID and TFIIB, have been found to bind transcriptional activators¹. Here we show that the general transcription factor TFIIF is also a target for a transcriptional activator, namely serum response factor (SRF), which binds to the c-fos promoter. Using a yeast interaction assay, we find that SRF binds the RAP74 subunit of TFIIF and that SRF's transcriptional activation domain is the region involved in this binding. Further, RAP74's central charged cluster domain is required for binding to SRF's activation domain. Deletion of this domain impairs RAP74's ability to support SRF-activated transcription in vitro but has little effect on the protein's basal transcription activity or its ability to support SP1-activated transcription. The correlation of SRF–RAP74 binding with transcriptional activation suggests that RAP74 is a critical target for SRF-activated transcription.

References

1.	Tjian, R. & Maniatis, M. Cell 77, 5−8 (1994). | Article | PubMed | ISI | ChemPort |
2.	Zhu, H., Joliot, V. & Prywes, R. J. biol. Chem. 269, 3489−3497 (1994). | PubMed | ChemPort |
3.	Dalton, S. & Treisman, R. Cell 68, 597−612 (1992). | Article | PubMed | ISI | ChemPort |
4.	Prywes, R. & Zhu, H. Nucleic Acids Res. 20, 513−520 (1992). | PubMed | ChemPort |
5.	Johansen, F.-E. & Prywes, R. Molec. cell. Biol. 13, 4640−4647 (1993). | PubMed | ChemPort |
6.	Lee, T.-C., Shi, Y. & Schwartz, R. J. Proc. natn. Acad. Sci. U.S.A. 89, 9814−9818 (1992). | ChemPort |
7.	Hill, C. S. et al. Cell 73, 395−406 (1993). | Article | PubMed | ISI | ChemPort |
8.	Liu, S.-H. et al. J. biol. Chem. 268, 21147−21154 (1993). | PubMed | ChemPort |
9.	Mueller, C. G. F. & Nordheim, A. EMBO J. 10, 4219−4229 (1991). | PubMed | ISI | ChemPort |
10.	Shaw, P. E. EMBO J. 11, 3011−3019 (1992). | PubMed | ISI | ChemPort |
11.	Johansen, F.-E. & Prywes, R. Molec. cell. Biol. 14, 5920−5928 (1994). | PubMed | ChemPort |
12.	Yonaha, M. et al. Nucleic Acids Res. 21, 273−279 (1993). | PubMed | ChemPort |
13.	Finkelstein, A. et al. Nature 355, 464−467 (1992). | Article | PubMed | ChemPort |
14.	Aso, T. et al. Nature 355, 461−464 (1992). | Article | PubMed | ChemPort |
15.	Flores, O. et al. Proc. natn. Acad. Sci. U.S.A. 88, 9999−10003 (1991). | ChemPort |
16.	Kim, Y.-J., Bjorklund, S., Li, Y., Sayre, M. H. & Kornberg, R. D. Cell 77, 599−608 (1994). | Article | PubMed | ISI | ChemPort |
17.	Koleske, A. J. & Young, R. A. Nature 386, 466−469 (1994).
18.	Flores, O., Maldonado, E. & Reinberg, D. J. biol. Chem. 264, 8913−8921 (1989). | PubMed | ISI | ChemPort |
19.	Price, D. H., Sluder, A. E. & Greenleaf, A. L. Molec. cell. Biol. 9, 1465−1475 (1989). | PubMed | ChemPort |
20.	Bengal, E., Flores, O., Krauskopf, A., Reinberg, D. & Aloni, Y. Molec. cell. Biol. 11, 1195−1206 (1991). | PubMed | ChemPort |
21.	Chang, C.-h., Kostrub, C. F. & Burton, Z. F. J. biol. Chem. 268, 20482−20489 (1993). | PubMed | ChemPort |
22.	Fields, S. & Song, O.-K. Nature 340, 245−246 (1989). | Article | PubMed | ISI | ChemPort |
23.	Wang, B. Q., Kostrub, C. F., Finkelstein, A. & Burton, Z. F. Protein Expr. Purif. 4, 207−214 (1993). | PubMed | ChemPort |