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Collisions of RNA polymerases behind the replication fork promote alternative RNA splicing in newly replicated chromatin.
- Source :
-
Molecular cell [Mol Cell] 2024 Jan 18; Vol. 84 (2), pp. 221-233.e6. Date of Electronic Publication: 2023 Dec 26. - Publication Year :
- 2024
-
Abstract
- DNA replication produces a global disorganization of chromatin structure that takes hours to be restored. However, how these chromatin rearrangements affect the regulation of gene expression and the maintenance of cell identity is not clear. Here, we use ChOR-seq and ChrRNA-seq experiments to analyze RNA polymerase II (RNAPII) activity and nascent RNA synthesis during the first hours after chromatin replication in human cells. We observe that transcription elongation is rapidly reactivated in nascent chromatin but that RNAPII abundance and distribution are altered, producing heterogeneous changes in RNA synthesis. Moreover, this first wave of transcription results in RNAPII blockages behind the replication fork, leading to changes in alternative splicing. Altogether, our results deepen our understanding of how transcriptional programs are regulated during cell division and uncover molecular mechanisms that explain why chromatin replication is an important source of gene expression variability.<br />Competing Interests: Declaration of interests The authors declare no competing interest.<br /> (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1097-4164
- Volume :
- 84
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Molecular cell
- Publication Type :
- Academic Journal
- Accession number :
- 38151016
- Full Text :
- https://doi.org/10.1016/j.molcel.2023.11.036