Dynamic regulation of transcription factors by nucleosome remodeling.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 26047462.
- Also identified by DOI 10.7554/eLife.06249 and PMC identifier 4456607.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The chromatin landscape and promoter architecture are dominated by the interplay of nucleosome and transcription factor (TF) binding to crucial DNA sequence elements. However, it remains unclear whether nucleosomes mobilized by chromatin remodelers can influence TFs that are already present on the DNA template. In this study, we investigated the interplay between nucleosome remodeling, by either yeast ISW1a or SWI/SNF, and a bound TF. We found that a TF serves as a major barrier to ISW1a remodeling, and acts as a boundary for nucleosome repositioning. In contrast, SWI/SNF was able to slide a nucleosome past a TF, with concurrent eviction of the TF from the DNA, and the TF did not significantly impact the nucleosome positioning. Our results provide direct evidence for a novel mechanism for both nucleosome positioning regulation by bound TFs and TF regulation via dynamic repositioning of nucleosomes.
Medical subject headings
- Adenosine Triphosphatases
- Chromosomal Proteins, Non-Histone
- DNA-Binding Proteins
- Models, Biological
- Nucleosomes
- Saccharomyces cerevisiae Proteins
- Transcription Factors