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Disruption of Trrap causes early embryonic lethality and defects in cell cycle progression
journal contribution
posted on 2023-05-17, 02:59 authored by Herceg, Z, Hulla, W, David GellDavid Gell, Cuenin, C, Lleonart, M, Jackson, S, Wang, ZQThe transactivation/transformation-domain associated protein (TRRAP) belongs to the Ataxia-telangiectasia mutated (ATM) super-family and has been identified as a cofactor for c-MYC-mediated oncogenic transformation. TRRAP and its yeast homolog (Tra1p) are components of histone acetyltransferase (HAT) complexes, SAGA (refs. 2,4,5), P]CAF (ref. 3) and NuA4 (ref. 6), which are important for the regulation of transcription and cell cycle progression and also have a role in cell viability. Yet the biological function of this molecule and how it controls proliferation are still unclear. Here we show that null mutation of Trrap in mice results in peri-implantation lethality due to a blocked proliferation of blastocysts. We use an inducible Cre-loxP system to show that loss of Trrap blocks cell proliferation because of aberrant mitotic exit accompanied by cytokinesis failure and endoreduplication. Trrap-deficient cells fail to sustain mitotic arrest despite chromosome missegregation and disrupted spindles, and display compromised cdk1 activity. Trrap is therefore essential for early development and required for the mitotic checkpoint and normal cell cycle progression.
History
Publication title
Nature GeneticsVolume
29Pagination
206-211ISSN
1061-4036Department/School
Menzies Institute for Medical ResearchPublisher
Nature Publishing GroupPlace of publication
345 Park Ave South, New York, USA, Ny, 10010-1707Repository Status
- Restricted