Abstract
Regulatory factors must contend with chromatin structure to function. Although nucleosome structure and position on promoters can be important in determining factor access, the intrinsic ability of factors to bind to nucleosomal DNA might also play an essential regulatory role. We have used templates where nucleosomes were either randomly positioned or rotationally phased to demonstrate that two transcription factors, heat shock factor (HSF) and GAL4, differ significantly in their ability to bind to nucleosomes. GAL4 was able to bind to nucleosomal templates. Surprisingly, in contrast to its behavior on naked DNA, GAL4 bound better to multiple GAL4 sites than to a single GAL4 site on these templates. HSF alone was not able to bind to nucleosomal templates. HSF was able to bind to nucleosomal templates, however, when the TATA-binding factor TFIID was present. Consequently, binding to nucleosomal templates could be facilitated by adjacent binding of the same protein in the case of GAL4 but required binding of a second protein in the case of HSF. Taken together, these data demonstrate that regulatory factors differ in their inherent ability to bind to nucleosomal templates. These differences are likely to be important to the function of these factors in vivo.
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Dates
Type | When |
---|---|
Created | 18 years, 2 months ago (June 5, 2007, 5:15 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 13, 2021, 11:21 p.m.) |
Indexed | 1 month, 4 weeks ago (July 2, 2025, 2:46 p.m.) |
Issued | 34 years, 1 month ago (July 1, 1991) |
Published | 34 years, 1 month ago (July 1, 1991) |
Published Online | 34 years, 1 month ago (July 1, 1991) |
Published Print | 34 years, 1 month ago (July 1, 1991) |
@article{Taylor_1991, title={Facilitated binding of GAL4 and heat shock factor to nucleosomal templates: differential function of DNA-binding domains.}, volume={5}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.5.7.1285}, DOI={10.1101/gad.5.7.1285}, number={7}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Taylor, I C and Workman, J L and Schuetz, T J and Kingston, R E}, year={1991}, month=jul, pages={1285–1298} }