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Mivelaz, Maxime ; Cao, Anne-Marinette ; Kubik, Slawomir ; Zencir, Sevil ; Hovius, Ruud ; Boichenko, Iuliia ; Stachowicz, Anna Maria ; Kurat, Christoph F. ; Shore, David ; Fierz, Beat:
Chromatin Fiber Invasion and Nucleosome Displacement by the Rap1 Transcription Factor.
In: Molecular Cell.
Bd. 77
(2020)
Heft 3
.
- S. 488-500.e9.
ISSN 1097-4164
DOI: https://doi.org/10.1016/j.molcel.2019.10.025
Abstract
Pioneer transcription factors (pTFs) bind to target sites within compact chromatin, initiating chromatin remodeling and controlling the recruitment of downstream factors. The mechanisms by which pTFs overcome the chromatin barrier are not well understood. Here, we reveal, using single-molecule fluorescence, how the yeast transcription factor Rap1 invades and remodels chromatin. Using a reconstituted chromatin system replicating yeast promoter architecture, we demonstrate that Rap1 can bind nucleosomal DNA within a chromatin fiber but with shortened dwell times compared to naked DNA. Moreover, we show that Rap1 binding opens chromatin fiber structure by inhibiting inter-nucleosome contacts. Finally, we reveal that Rap1 collaborates with the chromatin remodeler RSC to displace promoter nucleosomes, paving the way for long-lived bound states on newly exposed DNA. Together, our results provide a mechanistic view of how Rap1 gains access and opens chromatin, thereby establishing an active promoter architecture and controlling gene expression.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | FRET; RSC; Rap1; chromatin dynamics; chromatin remodeling; chromatin structure; pioneer transcription factor; single-molecule fluorescence |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften |
| Eingestellt am: | 06 Aug 2026 08:00 |
| Letzte Änderung: | 06 Aug 2026 08:00 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/99206 |