Arroyo, Maria ; Casas-Delucchi, Corella S. ; Pabba, Maruthi K. ; Prorok, Paulina ; Pradhan, Sunil K. ; Rausch, Cathia ; Lehmkuhl, Anne ; Maiser, Andreas ; Buschbeck, Marcus ; Pasque, Vincent ; Bernstein, Emily ; Luck, Katja ; Cardoso, M. Cristina (2024)
Histone variant macroH2A1 regulates synchronous firing of replication origins in the inactive X chromosome.
In: Nucleic acids research, 52 (9)
doi: 10.1093/nar/gkae734
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
MacroH2A has been linked to transcriptional silencing, cell identity, and is a hallmark of the inactive X chromosome (Xi). However, it remains unclear whether macroH2A plays a role in DNA replication. Using knockdown/knockout cells for each macroH2A isoform, we show that macroH2A-containing nucleosomes slow down replication progression rate in the Xi reflecting the higher nucleosome stability. Moreover, macroH2A1, but not macroH2A2, regulates the number of nano replication foci in the Xi, and macroH2A1 downregulation increases DNA loop sizes corresponding to replicons. This relates to macroH2A1 regulating replicative helicase loading during G1 by interacting with it. We mapped this interaction to a phenylalanine in macroH2A1 that is not conserved in macroH2A2 and the C-terminus of Mcm3 helicase subunit. We propose that macroH2A1 enhances the licensing of pre-replication complexes via DNA helicase interaction and loading onto the Xi.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Arroyo, Maria ; Casas-Delucchi, Corella S. ; Pabba, Maruthi K. ; Prorok, Paulina ; Pradhan, Sunil K. ; Rausch, Cathia ; Lehmkuhl, Anne ; Maiser, Andreas ; Buschbeck, Marcus ; Pasque, Vincent ; Bernstein, Emily ; Luck, Katja ; Cardoso, M. Cristina |
| Art des Eintrags: | Bibliographie |
| Titel: | Histone variant macroH2A1 regulates synchronous firing of replication origins in the inactive X chromosome |
| Sprache: | Englisch |
| Publikationsjahr: | 27 August 2024 |
| Verlag: | Oxford University Press |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nucleic acids research |
| Jahrgang/Volume einer Zeitschrift: | 52 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.1093/nar/gkae734 |
| Kurzbeschreibung (Abstract): | MacroH2A has been linked to transcriptional silencing, cell identity, and is a hallmark of the inactive X chromosome (Xi). However, it remains unclear whether macroH2A plays a role in DNA replication. Using knockdown/knockout cells for each macroH2A isoform, we show that macroH2A-containing nucleosomes slow down replication progression rate in the Xi reflecting the higher nucleosome stability. Moreover, macroH2A1, but not macroH2A2, regulates the number of nano replication foci in the Xi, and macroH2A1 downregulation increases DNA loop sizes corresponding to replicons. This relates to macroH2A1 regulating replicative helicase loading during G1 by interacting with it. We mapped this interaction to a phenylalanine in macroH2A1 that is not conserved in macroH2A2 and the C-terminus of Mcm3 helicase subunit. We propose that macroH2A1 enhances the licensing of pre-replication complexes via DNA helicase interaction and loading onto the Xi. |
| ID-Nummer: | pmid:39189450 |
| Zusätzliche Informationen: | Artikel-ID: gkae734 |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie 10 Fachbereich Biologie > Cell Biology and Epigenetics |
| Hinterlegungsdatum: | 02 Sep 2024 12:27 |
| Letzte Änderung: | 04 Nov 2024 13:07 |
| PPN: | 521060729 |
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