Acute multi-level response to defective de novo chromatin assembly in S-phase

Jan Dreyer, Giulia Ricci, Jeroen van den Berg, Vivek Bhardwaj, Janina Funk, Claire Armstrong, Vincent van Batenburg, Chance Sine, Michael A VanInsberghe, Rinskje B Tjeerdsma, Richard Marsman, Imke K Mandemaker, Simone di Sanzo, Juliette Costantini, Stefano G Manzo, Alva Biran, Claire Burny, Marcel A T M van Vugt, Moritz Völker-Albert, Anja GrothSabrina L Spencer, Alexander van Oudenaarden, Francesca Mattiroli*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Long-term perturbation of de novo chromatin assembly during DNA replication has profound effects on epigenome maintenance and cell fate. The early mechanistic origin of these defects is unknown. Here, we combine acute degradation of chromatin assembly factor 1 (CAF-1), a key player in de novo chromatin assembly, with single-cell genomics, quantitative proteomics, and live microscopy to uncover these initiating mechanisms in human cells. CAF-1 loss immediately slows down DNA replication speed and renders nascent DNA hyper-accessible. A rapid cellular response, distinct from canonical DNA damage signaling, is triggered and lowers histone mRNAs. In turn, histone variants' usage and their modifications are altered, limiting transcriptional fidelity and delaying chromatin maturation within a single S-phase. This multi-level response induces a p53-dependent cell-cycle arrest after mitosis. Our work reveals the immediate consequences of defective de novo chromatin assembly during DNA replication, indicating how at later times the epigenome and cell fate can be altered.

Original languageEnglish
Pages (from-to)4711-4728.e10
Number of pages29
JournalMolecular Cell
Volume84
Issue number24
Early online date5-Nov-2024
DOIs
Publication statusPublished - 19-Dec-2024

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