Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

RNA polymerase I (Pol I) transcription in the yeast Saccharomyces cerevisiae is greatly stimulated in vivo and in vitro by the multiprotein complex, upstream activation factor (UAF). UAF binds tightly to the upstream element of the rDNA promoter, such that once bound ( in vitro ), UAF does not readily exchange onto a competing template. Of the polypeptides previously identified in purified UAF, three are encoded by genes required for Pol I transcription in vivo : RRN5 , RRN9 , and RRN10 . Two others, p30 and p18, have remained uncharacterized. We report here that the N-terminal amino acid sequence, its mobility in gel electrophoresis, and the immunoreactivity of p18 shows that it is histone H3. In addition, histone H4 was found in UAF, and myc-tagged histone H4 could be used to affinity-purify UAF. Histones H2A and H2B were not detectable in UAF. These results suggest that histones H3 and H4 probably account for the strong binding of UAF to DNA and may offer a means by which general nuclear regulatory signals could be transmitted to Pol I.

Bibliography

Keener, J., Dodd, J. A., Lalo, D., & Nomura, M. (1997). Histones H3 and H4 are components of upstream activation factor required for the high-level transcription of yeast rDNA by RNA polymerase I. Proceedings of the National Academy of Sciences, 94(25), 13458–13462.

Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 10:31 a.m.)
Deposited 3 years, 4 months ago (April 13, 2022, 2:48 p.m.)
Indexed 1 month, 2 weeks ago (July 11, 2025, 6:24 a.m.)
Issued 27 years, 8 months ago (Dec. 9, 1997)
Published 27 years, 8 months ago (Dec. 9, 1997)
Published Online 27 years, 8 months ago (Dec. 9, 1997)
Published Print 27 years, 8 months ago (Dec. 9, 1997)
Funders 0

None

@article{Keener_1997, title={Histones H3 and H4 are components of upstream activation factor required for the high-level transcription of yeast rDNA by RNA polymerase I}, volume={94}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.94.25.13458}, DOI={10.1073/pnas.94.25.13458}, number={25}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Keener, John and Dodd, Jonathan A. and Lalo, Dominique and Nomura, Masayasu}, year={1997}, month=dec, pages={13458–13462} }