Apostolou, Z.* ; Venkatasubramani, A.V.* ; Kopp, L.C.* ; Kars, G.* ; Scacchetti, A.* ; Campos-Sparr, A.* ; Schauer, T. ; Imhof, A.* ; Becker, P.B.*
The Tip60 acetylome is a hallmark of the proliferative state in Drosophila.
Nucleic Acids Res. 53, 19:gkaf1087 (2025)
The acetyltransferase KAT5/Tip60 is an epigenetic regulator of transcription and the DNA damage response. In Drosophila, Tip60 acetylates histones as part of the DOM-A complex, but it is unclear whether it has other substrates. In this work, we comprehensively studied the functions of Tip60 in a Drosophila proliferative cell model. Depletion of Tip60 slows cell-cycle progression, but remaining viable cells resist mutagenic irradiation. The impaired proliferation is explained by reduced expression of critical cell-cycle genes. Tip60 binds their transcription start sites and Tip60-dependent acetylation of the histone variant H2A.V correlates with transcription activity. A potentially synergistic pathway for cell-cycle regulation involves the acetylation of proteins other than histones. The Tip60-dependent nuclear acetylome contains hundreds of proteins, many of which are involved in diverse aspects of cell growth and division, including replication, mitosis, gene expression, chromatin organization, and ribosome biogenesis. We hypothesize that Tip60 coordinates the proliferative state through histone and non-histone effectors. Reversible acetylation of diverse effector proteins bears potential for fine-tuning energy-intensive processes in response to stresses or nutritional shortcomings. Our study portrays the DOM-A/TIP60 complex as a general promoter of cell proliferation.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
Cell-cycle Progression; Acetyltransferase Complex; Lysine Acetylation; Chromatin; Gene; Protein; Roles; H2a.z; Nua4; Expression
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2025
Prepublished im Jahr
0
HGF-Berichtsjahr
2025
ISSN (print) / ISBN
0305-1048
e-ISSN
1362-4962
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
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Konferenzband
Quellenangaben
Band: 53,
Heft: 20,
Seiten: 19,
Artikelnummer: gkaf1087
Supplement: ,
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Verlag
Oxford University Press
Verlagsort
Great Clarendon St, Oxford Ox2 6dp, England
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0000-00-00
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Prüfer
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Veröffentlichungsdatum
0000-00-00
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0000-00-00
Anmelder/Inhaber
weitere Inhaber
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Begutachtungsstatus
Peer reviewed
POF Topic(s)
30204 - Cell Programming and Repair
Forschungsfeld(er)
Stem Cell and Neuroscience
PSP-Element(e)
G-506200-001
Förderungen
Deutsche Forschungsgemeinschaft
EMBO
Copyright
Erfassungsdatum
2025-11-10